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If you’re searching for a reliable grey water tank, you’re likely weighing capacity, portability, and durability. The Camco Rhino 36-Gallon Tote Tank stands out as the best overall for its large capacity and sturdy build, perfect for extended trips. The RecPro Combo Tank offers excellent value with versatile sizes, while the YITAMOTOR 40L Portable Water Tank excels in portability for smaller setups. The main tradeoffs involve balancing size with ease of transport and budget constraints. Continue reading for a detailed breakdown of these top options and what suits your needs best.

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11
compared
7
brands
Which grey water tank should you buy?
★ Top Pick
Camco Rhino 15-Gallon RV Porta
Best Overall for Portable Waste Management
Durable and UV-resistant construction for outdoor use
See on Amazon →
RV owners seeking an affordable, reliable dual water tank setup for travel and extended trips.
RecPro RV Fresh & Gray Water T
Durable and sturdy polyethylene construction
View on Amazon →
Outdoor adventurers needing a portable, rugged tank for freshwater or waste management during camping, hiking, or emergency prep.
YITAMOTOR 40L Portable Water T
Large wheels and handle for easy mobility
View on Amazon →
RV travelers who need a large, safe, and durable water tank for extended trips and long-term water storage.
36 Gallon RV Fresh Water Tank
Made from BPA-free, impact-resistant plastics
View on Amazon →
RV owners seeking a reliable, portable waste tank for regular use during longer trips or multiple-day stays.
Camco Rhino 21-Gallon RV Porta
Durable and UV-resistant construction
View on Amazon →
Pros & cons at a glance
Camco Rhino 15-Gallon RV Porta
✓ Durable and UV-resistant construction for outdoor use
✗ Heavy at 31.5 lbs, may be cumbersome for some users
RecPro RV Fresh & Gray Water T
✓ Durable and sturdy polyethylene construction
✗ Limited to RV and trailer use, not versatile for other applications
YITAMOTOR 40L Portable Water T
✓ Large wheels and handle for easy mobility
✗ Heavy when filled to capacity, affecting portability
36 Gallon RV Fresh Water Tank
✓ Made from BPA-free, impact-resistant plastics
✗ Does not include hardware or fittings, requiring additional purchase
Camco Rhino 21-Gallon RV Porta
✓ Durable and UV-resistant construction
✗ Heavy at 34.5 lbs, may be tiring to carry
16 Gallon RV Fresh/Gray Water
✓ Durable, corrosion-resistant polyethylene construction
✗ Requires venting due to non-pressurized setup
WT-3232 1.5" Grey Water RV Was
✓ Made in the USA from durable MDPE
✗ Hardware and fittings are not included
21 Gallon RV Fresh/Gray Water
✓ Durable, corrosion and rust resistant
✗ Requires venting due to non-pressurized design
Camco Rhino 28-Gallon Camper/R
✓ Heavy-duty, no-flat wheels for easy transport
✗ Heavy when fully loaded, at 43 lbs
RecPro 21 & 30 Gallon Fresh &
✓ High total capacity of 51 gallons
✗ No included mounting hardware or detailed instructions
Camco Rhino 36-Gallon RV Tote
✓ Large 36-gallon capacity reduces frequent dumping
✗ Heavy at 45 lbs, which can be difficult to lift when full

Key Takeaways

  • Capacity varies widely, so choose based on your typical usage and storage space.
  • Portable tanks with wheels offer easier handling but may compromise on size and durability.
  • Combo sets are ideal for versatile RV setups but may be more expensive upfront.
  • Materials like BPA-free plastics ensure safety for potable water, influencing choice for fresh vs gray water.
  • Heavy-duty construction and features like built-in valves enhance longevity and ease of maintenance.
2
RecPro RV Fresh & Gray Water T
Best Value for Dual Water Storage
1
Camco Rhino 15-Gallon RV Porta
Best Overall for Portable Waste Management
3
YITAMOTOR 40L Portable Water T
Best for Rugged Outdoor Use and Versatility

Our Top Grey Water Tank Picks

Camco Rhino 15-Gallon RV Portable Tote TankCamco Rhino 15-Gallon RV Portable Tote TankBest Overall for Portable Waste ManagementCapacity: 15 gallonsDimensions: 20 1/8″ (L) x 12 1/2″ (W) x 32 1/8″ (H)Weight: 31.5 lbsVIEW ON AMAZONSee Our Full Breakdown
RecPro RV Fresh & Gray Water Tank Combo, 21 & 30 GallonRecPro RV Fresh & Gray Water Tank Combo, 21 & 30 GallonBest Value for Dual Water StorageCapacity: 21 & 30 gallonsMaterial: PolyethyleneMade in: USAVIEW ON AMAZONSee Our Full Breakdown
YITAMOTOR 40L Portable Water Tank with Handle and Wheels, GrayYITAMOTOR 40L Portable Water Tank with Handle and Wheels, GrayBest for Rugged Outdoor Use and VersatilityCapacity: 10.6 gallons (40L)Material: PP and HDPEColor: GrayVIEW ON AMAZONSee Our Full Breakdown
36 Gallon RV Fresh Water Tank – Potable Water Storage for Campers, Trailers, Motorhomes36 Gallon RV Fresh Water Tank - Potable Water Storage for Campers, Trailers, MotorhomesBest for Safe, Long-Term Drinking Water StorageCapacity: 36 gallonsDimensions: 37 x 16 x 15 inchesMaterial: BPA-Free plasticVIEW ON AMAZONSee Our Full Breakdown
Camco Rhino 21-Gallon RV Portable Tote TankCamco Rhino 21-Gallon RV Portable Tote TankBest for Waste Disposal with Ease of TransportCapacity: 21 gallonsDimensions: 20 1/8″ (L) x 12 1/2″ (W) x 40″ (H)Weight: 34.5 lbsVIEW ON AMAZONSee Our Full Breakdown
16 Gallon RV Fresh/Gray Water Tank 24 x 15 x 10 BPA Free16 Gallon RV Fresh/Gray Water Tank 24 x 15 x 10 BPA FreeBest Compact Storage for Lightweight Gray Water NeedsCapacity: 16 gallonsDimensions: 24 x 15 x 10 inchesMaterial: PolyethyleneVIEW ON AMAZONSee Our Full Breakdown
WT-3232 1.5″ Grey Water RV Waste Holding Tank 32 GallonWT-3232 1.5" Grey Water RV Waste Holding Tank 32 GallonBest for Customizable RV Waste ManagementCapacity: 32 gallonsMaterial: Medium Density PolyethyleneInlet & Vent: CustomizableVIEW ON AMAZONSee Our Full Breakdown
21 Gallon RV Fresh/Gray Water Tank 39″ x 16″ x 8″ – BPA Free21 Gallon RV Fresh/Gray Water Tank 39" x 16" x 8" - BPA FreeBest for Versatile Fresh or Gray Water Storage in Small RVsCapacity: 21 gallonsDimensions: 39″ x 16″ x 8″Material: PolyethyleneVIEW ON AMAZONSee Our Full Breakdown
Camco Rhino 28-Gallon Camper/RV Tote Tank with Heavy-Duty No-Flat Wheels and Built-in Gate ValveCamco Rhino 28-Gallon Camper/RV Tote Tank with Heavy-Duty No-Flat Wheels and Built-in Gate ValveBest for Hassle-Free Waste Disposal on the GoCapacity: 28 gallonsDimensions: 14.5″ L x 24″ W x 44″ HWeight: 43 lbsVIEW ON AMAZONSee Our Full Breakdown
RecPro 21 & 30 Gallon Fresh & Gray Water Holding Tank ComboRecPro 21 & 30 Gallon Fresh & Gray Water Holding Tank ComboBest High-Capacity Dual-Tank System for Extended UseTank Capacity: 21 & 30 gallonsTotal Capacity: 51 gallonsMaterial: BPA Free polyethyleneVIEW ON AMAZONSee Our Full Breakdown
Camco Rhino 36-Gallon RV Tote TankCamco Rhino 36-Gallon RV Tote TankBest for Large-Scale Waste Disposal on the GoCapacity: 36 gallonsDimensions: 24 1/8″ (L) x 14 3/4″ (W) x 44 7/8″ (H)Weight: 45 lbsVIEW ON AMAZONSee Our Full Breakdown
Specs at a glance
grey water tankMaterialCapacityDimensions
Camco Rhino 15-Gallon RV PortaUV-stabilized blow-molded HDPE15 gallons20 1/8" (L) x 12 1/2" (W) x 32 1/8" (H)
RecPro RV Fresh & Gray Water TPolyethylene21 & 30 gallons
YITAMOTOR 40L Portable Water TPP and HDPE10.6 gallons (40L)
36 Gallon RV Fresh Water TankBPA-Free plastic36 gallons37 x 16 x 15 inches
Camco Rhino 21-Gallon RV PortaUV-stabilized HDPE21 gallons20 1/8" (L) x 12 1/2" (W) x 40" (H)
16 Gallon RV Fresh/Gray Water Polyethylene16 gallons24 x 15 x 10 inches
WT-3232 1.5" Grey Water RV WasMedium Density Polyethylene32 gallons
21 Gallon RV Fresh/Gray Water Polyethylene21 gallons39" x 16" x 8"
Camco Rhino 28-Gallon Camper/RUV-stabilized HDPE28 gallons14.5" L x 24" W x 44" H
RecPro 21 & 30 Gallon Fresh & BPA Free polyethylene
Camco Rhino 36-Gallon RV Tote UV-stabilized blow-molded HDPE36 gallons24 1/8" (L) x 14 3/4" (W) x 44 7/8" (H)

More Details on Our Top Picks

  1. Camco Rhino 15-Gallon RV Portable Tote Tank

    Camco Rhino 15-Gallon RV Portable Tote Tank

    Best Overall for Portable Waste Management

    View on Amazon

    The Camco Rhino 15-Gallon Tote Tank stands out for its rugged build and user-friendly features, making it ideal for RV owners needing reliable waste disposal on the go. Unlike the smaller 21-gallon Rhino model, it offers a larger capacity, but at the cost of increased weight and storage requirements. Its UV-stabilized HDPE construction ensures durability against outdoor elements, while the large wheels and handle facilitate transport over uneven terrain. The inclusion of a tank rinser simplifies cleaning, a key advantage over less equipped models. However, at 31.5 lbs, it can feel heavy and awkward for some users, especially during frequent transfers. This pick makes the most sense for RV users who prioritize durability and ease of transport during outdoor trips, and who have space to store a larger tank.

    Pros:
    • Durable and UV-resistant construction for outdoor use
    • Large wheels and handle for easy transport over terrain
    • Includes comprehensive hoses and accessories for convenience
    • Built-in tank rinser simplifies cleaning
    Cons:
    • Heavy at 31.5 lbs, may be cumbersome for some users
    • Requires significant storage space when not in use
    • Designed specifically for waste disposal, limited versatility

    Best for: RV owners needing a durable, portable waste tank for outdoor adventures with reliable cleaning features.

    Not ideal for: Campers with limited storage space or those seeking a lightweight, compact solution for occasional use.

    • Capacity:15 gallons
    • Dimensions:20 1/8″ (L) x 12 1/2″ (W) x 32 1/8″ (H)
    • Weight:31.5 lbs
    • Material:UV-stabilized blow-molded HDPE
    Our verdict
    “This tank is best suited for RV owners who need a durable, portable waste solution with easy cleaning capabilities and ample capacity.”
  2. RecPro RV Fresh & Gray Water Tank Combo, 21 & 30 Gallon

    RecPro RV Fresh & Gray Water Tank Combo, 21 & 30 Gallon

    Best Value for Dual Water Storage

    View on Amazon

    The RecPro Water Tank Combo offers a practical solution for RV travelers who need both fresh and gray water storage in one package. Compared with separate tanks, this combo provides flexibility at a more affordable price point, especially for those who want to minimize setup complexity. Its sturdy polyethylene construction ensures durability, and available in 21 or 30 gallons, it suits various trip lengths. However, the lack of detailed installation instructions and limited use outside RVs make it less appealing for those seeking versatile or DIY setups. This model is better suited for RV owners who want reliable water storage with simplicity and cost-effectiveness, but it may frustrate users requiring detailed installation guidance or broader applications.

    Pros:
    • Durable and sturdy polyethylene construction
    • Available in 21 and 30-gallon capacities for flexibility
    • Made in the USA ensures consistent quality
    • Leak-proof and BPA-free for safe water storage
    Cons:
    • Limited to RV and trailer use, not versatile for other applications
    • No detailed installation instructions included
    • Potentially less suited for DIY or non-RV setups

    Best for: RV owners seeking an affordable, reliable dual water tank setup for travel and extended trips.

    Not ideal for: Campers needing detailed installation guidance or planning to use tanks outside of RV environments.

    • Capacity:21 & 30 gallons
    • Material:Polyethylene
    • Made in:USA
    • Wall Thickness:1/8 inch
    Our verdict
    “This combo is ideal for RV owners who want cost-effective and reliable water storage without complex installation needs.”
  3. YITAMOTOR 40L Portable Water Tank with Handle and Wheels, Gray

    YITAMOTOR 40L Portable Water Tank with Handle and Wheels, Gray

    Best for Rugged Outdoor Use and Versatility

    View on Amazon

    The YITAMOTOR 40L Portable Water Tank offers a flexible solution for outdoor enthusiasts needing both freshwater and waste management in one container. Its 10.6-gallon capacity is smaller than larger RV tanks but makes it highly portable and easy to handle, especially with its large wheels and sturdy handle. Made from durable PP and HDPE, it withstands rough conditions and frequent movement. Multiple filling and draining ports add convenience for varied outdoor uses, from camping to emergency water supply. Still, its weight increases significantly when filled, and it might be bulky for storage in small vehicles or cabins. This tank suits those who prioritize mobility and rugged durability over maximum capacity, particularly for outdoor activities where space is limited.

    Pros:
    • Large wheels and handle for easy mobility
    • Durable construction for outdoor ruggedness
    • Multiple outlets for flexible filling and draining
    • Suitable for freshwater or sewage use
    Cons:
    • Heavy when filled to capacity, affecting portability
    • Bulky to store in small spaces or compact vehicles
    • Limited to 10.6 gallons, smaller than RV tanks

    Best for: Outdoor adventurers needing a portable, rugged tank for freshwater or waste management during camping, hiking, or emergency prep.

    Not ideal for: Users who require large capacity storage or have limited space for bulky equipment in small vehicles or cabins.

    • Capacity:10.6 gallons (40L)
    • Material:PP and HDPE
    • Color:Gray
    • Wheels:Large for easy mobility
    • Handle:Solid metal handle
    • Outlets:Multiple filling and draining ports
    Our verdict
    “This tank is perfect for outdoor lovers who need a tough, portable solution for water or waste management in rugged environments.”
  4. 36 Gallon RV Fresh Water Tank – Potable Water Storage for Campers, Trailers, Motorhomes

    36 Gallon RV Fresh Water Tank - Potable Water Storage for Campers, Trailers, Motorhomes

    Best for Safe, Long-Term Drinking Water Storage

    View on Amazon

    The 36-Gallon RV Fresh Water Tank is designed specifically for storing potable water safely during extended trips. Made from BPA-free, impact-resistant plastics, it offers a reliable, hygienic option for drinking, cooking, and cleaning. Its multiple fitting options facilitate straightforward installation, making it suitable for a range of RV setups. Compared to smaller tanks, its larger capacity supports longer travel periods without frequent refills. However, its lack of included hardware and the need for regular maintenance make it less convenient for quick setups or infrequent use. This tank is ideal for RV owners prioritizing long-term safe water storage, but those seeking a ready-to-install solution might prefer models with hardware included.

    Pros:
    • Made from BPA-free, impact-resistant plastics
    • Easy to install with multiple fitting options
    • Certified safe for potable water
    • Large 36-gallon capacity supports long trips
    Cons:
    • Does not include hardware or fittings, requiring additional purchase
    • Cannot be pressurized or hung by straps
    • Requires regular cleaning and maintenance

    Best for: RV travelers who need a large, safe, and durable water tank for extended trips and long-term water storage.

    Not ideal for: Campers seeking an all-in-one, ready-to-install solution or those with limited space for larger tanks.

    • Capacity:36 gallons
    • Dimensions:37 x 16 x 15 inches
    • Material:BPA-Free plastic
    • Made in:USA
    • Fittings:Two 1.5-inch balloon style threaded NPT, Two 0.5-inch threaded NPT
    • Impact-resistant:Yes
    Our verdict
    “This tank is best suited for RV owners who need a large, durable, and safe water storage solution for long-term use.”
  5. Camco Rhino 21-Gallon RV Portable Tote Tank

    Camco Rhino 21-Gallon RV Portable Tote Tank

    Best for Waste Disposal with Ease of Transport

    View on Amazon

    The Camco Rhino 21-Gallon Tote Tank offers a balanced combination of capacity and portability for RV waste management. Its UV-stabilized HDPE construction ensures durability, similar to the larger 28-gallon Rhino model but with less bulk, making it more manageable for those with limited storage. The large wheels and oversized handle facilitate movement, while the drain hole and tank rinser allow straightforward cleaning. Compared to the 15-gallon model, it supports longer trips without refilling, but its weight of 34.5 lbs can be tiring during frequent handling. This tank is ideal for RV owners needing a reliable waste disposal option that balances size and ease of transport, particularly when storage space is somewhat limited.

    Pros:
    • Durable and UV-resistant construction
    • Easy to transport with large wheels and handle
    • Includes hoses and accessories for quick setup
    • Drain hole and tank rinser for easy cleaning
    Cons:
    • Heavy at 34.5 lbs, may be tiring to carry
    • Requires designated storage space when not in use
    • Limited to waste disposal, not versatile for other uses

    Best for: RV owners seeking a reliable, portable waste tank for regular use during longer trips or multiple-day stays.

    Not ideal for: Casual users or those with very limited storage who prefer smaller, more lightweight options for occasional waste disposal.

    • Capacity:21 gallons
    • Dimensions:20 1/8″ (L) x 12 1/2″ (W) x 40″ (H)
    • Weight:34.5 lbs
    • Material:UV-stabilized HDPE
    • Made in:USA
    Our verdict
    “This tank is well-suited for RV owners needing a dependable, portable waste solution with manageable capacity for frequent trips.”
  6. 16 Gallon RV Fresh/Gray Water Tank 24 x 15 x 10 BPA Free

    16 Gallon RV Fresh/Gray Water Tank 24 x 15 x 10 BPA Free

    Best Compact Storage for Lightweight Gray Water Needs

    View on Amazon

    This 16-gallon tank is ideal for those seeking a lightweight and durable solution for gray or fresh water, especially when space is limited. Its seamless polyethylene construction offers excellent resistance to leaks and corrosion, making it comparable to larger tanks like the RecPro 21 & 30 Gallon Combo, but at nearly half the capacity. While it doesn’t include fittings or accessories, its versatile connections suit multiple installation configurations. The non-pressurized design requires venting, adding a step for proper setup. Compared to larger tanks like the Camco Rhino 28-Gallon Tote, this model is less cumbersome for small spaces but offers less capacity for extended use.

    Pros:
    • Durable, corrosion-resistant polyethylene construction
    • Seamless design minimizes leak risk
    • Compact size for tight spaces
    • Versatile connection points
    Cons:
    • Requires venting due to non-pressurized setup
    • No included fittings or accessories
    • Limited capacity for large or long-term use

    Best for: Owners of small RVs or boats needing a compact, reliable gray water tank that fits tight spaces.

    Not ideal for: Long-term campers or commercial operators needing high-volume tanks, as 16 gallons quickly run out under heavy use.

    • Capacity:16 gallons
    • Dimensions:24 x 15 x 10 inches
    • Material:Polyethylene
    • Connections:1.25-inch inlet, 3 x 3/8-inch NPT
    • Features:Seamless, non-pressurized, BPA free
    Our verdict
    “This tank suits users prioritizing portability and durability over capacity, especially in constrained spaces.”
  7. WT-3232 1.5″ Grey Water RV Waste Holding Tank 32 Gallon

    WT-3232 1.5" Grey Water RV Waste Holding Tank 32 Gallon

    Best for Customizable RV Waste Management

    View on Amazon

    This 32-gallon waste tank excels for RV owners who want a sizable and adaptable solution, especially compared with smaller tanks like the Camco Rhino 15-Gallon. Its durable MDPE material ensures longevity, while the customizable inlet and vent options allow tailored installation—though, unlike the RecPro combo, it doesn’t include fittings, which could add to initial setup costs. Its intended use strictly covers waste and gray water, making it unsuitable for potable water. Larger capacity means fewer dump trips, but proper venting and hardware are essential for leak-free operation.

    Pros:
    • Made in the USA from durable MDPE
    • Large 32-gallon capacity reduces frequent emptying
    • Customizable inlet and vent options
    • Suitable for various RV and camper configurations
    Cons:
    • Hardware and fittings are not included
    • Designed solely for waste and gray water, not potable use
    • Installation complexity due to customization needs

    Best for: Full-time RVers or campers who need a large capacity and flexible installation options for waste disposal.

    Not ideal for: Casual users or those with minimal space who prefer ready-to-install tanks with hardware included, as this one requires additional fittings.

    • Capacity:32 gallons
    • Material:Medium Density Polyethylene
    • Inlet & Vent:Customizable
    • Outlet Size:1.5 inches
    • Made in:USA
    Our verdict
    “This tank offers high capacity and customization for experienced RV owners focused on long-term waste management.”
  8. 21 Gallon RV Fresh/Gray Water Tank 39″ x 16″ x 8″ – BPA Free

    21 Gallon RV Fresh/Gray Water Tank 39" x 16" x 8" - BPA Free

    Best for Versatile Fresh or Gray Water Storage in Small RVs

    View on Amazon

    This 21-gallon tank balances capacity with ease of installation, making it a good choice for RV owners who need reliable fresh or gray water storage without bulk. Its seamless polyethylene build offers durability similar to the RecPro combo, but with a smaller footprint. Multiple connection points provide flexibility, yet the non-pressurized design mandates venting, which could complicate installation. Compared to larger tanks like the Camco Rhino 28-Gallon, it’s less suitable for extended trips but perfect for shorter camping excursions where space and weight matter.

    Pros:
    • Durable, corrosion and rust resistant
    • Seamless construction reduces leak risk
    • Multiple connection points for versatile setup
    • Resistant to stains and rust
    Cons:
    • Requires venting due to non-pressurized design
    • No included fittings or venting components
    • Limited capacity for heavy or extended use

    Best for: Small RV or marine users seeking a dependable, easy-to-manage water tank for intermittent use.

    Not ideal for: Heavy water users or long-term setups, as 21 gallons can be limiting over extended periods or in high-usage scenarios.

    • Capacity:21 gallons
    • Dimensions:39″ x 16″ x 8″
    • Material:Polyethylene
    • Inlet:1.25″ water fill inlet
    • Connections:3 x 3/8″ NPT
    • Features:Seamless, non-pressurized, stain and rust resistant
    Our verdict
    “This tank provides a compact, durable solution for short-term or space-conscious RV and boat needs.”
  9. Camco Rhino 28-Gallon Camper/RV Tote Tank with Heavy-Duty No-Flat Wheels and Built-in Gate Valve

    Camco Rhino 28-Gallon Camper/RV Tote Tank with Heavy-Duty No-Flat Wheels and Built-in Gate Valve

    Best for Hassle-Free Waste Disposal on the Go

    View on Amazon

    This 28-gallon tote tank is designed to simplify waste removal, especially for RV owners who park far from dump stations. Its heavy-duty, no-flat wheels and large handle make transport easier compared to smaller, portable options like the Camco Rhino 15-Gallon. The built-in gate valve streamlines waste discharge, while the UV-stabilized HDPE construction ensures durability against outdoor elements. However, the tank’s size and weight—43 pounds when full—may pose handling challenges for smaller users or limited storage spaces. Its bulkiness makes it less suitable for frequent, small-volume trips but ideal for extended or remote camping.

    Pros:
    • Heavy-duty, no-flat wheels for easy transport
    • Built-in gate valve simplifies waste dumping
    • UV-stabilized HDPE withstands outdoor conditions
    • Includes sewer hose and tank rinser
    Cons:
    • Heavy when fully loaded, at 43 lbs
    • Bulky size limits storage options
    • Designed only for waste, not potable water

    Best for: RVers needing a rugged, portable waste tank capable of handling large volumes with minimal hassle.

    Not ideal for: Users with limited storage space or those preferring smaller, more manageable tanks for occasional use.

    • Capacity:28 gallons
    • Dimensions:14.5″ L x 24″ W x 44″ H
    • Weight:43 lbs
    • Material:UV-stabilized HDPE
    • Features:No-flat wheels, gate valve, tank rinser
    Our verdict
    “This tote tank offers durable, portable waste management ideal for remote or high-volume use situations.”
  10. RecPro 21 & 30 Gallon Fresh & Gray Water Holding Tank Combo

    RecPro 21 & 30 Gallon Fresh & Gray Water Holding Tank Combo

    Best High-Capacity Dual-Tank System for Extended Use

    View on Amazon

    This dual-tank package provides a combined 51 gallons of fresh and gray water capacity, surpassing single-tank options like the 16-gallon model or the Camco Rhino 28-Gallon tote. Its seamless, BPA-free polyethylene construction ensures impact resistance and safety for potable water. The tanks are designed for easy plumbing, though the lack of detailed installation instructions and hardware may complicate setup for some users. Compared with smaller tanks, this setup is better suited for long trips or full-time RV living, but the total weight and space requirement might be a concern for those with limited storage.

    Pros:
    • High total capacity of 51 gallons
    • Durable, seamless BPA-free polyethylene
    • Impact and rust resistant
    • Made in the USA with quality standards
    Cons:
    • No included mounting hardware or detailed instructions
    • Installation may require additional fittings
    • Bulkier and heavier than single tanks

    Best for: Extended RV trips or food trucks that need reliable, large-scale water storage with flexible plumbing options.

    Not ideal for: Casual users or those with limited space who prefer smaller, ready-to-go tanks with included hardware and straightforward installation.

    • Tank Capacity:21 & 30 gallons
    • Total Capacity:51 gallons
    • Material:BPA Free polyethylene
    • Construction:Seamless, rotational-molded
    • Wall Thickness:1/8 inch
    • Inlet Diameter:7/8 inch
    Our verdict
    “This dual-tank system is ideal for users needing large, dependable water storage with customization potential for long-term use.”
  11. Camco Rhino 36-Gallon RV Tote Tank

    Camco Rhino 36-Gallon RV Tote Tank

    Best for Large-Scale Waste Disposal on the Go

    View on Amazon

    The Camco Rhino 36-Gallon RV Tote Tank stands out for its substantial capacity, making it ideal for extended trips where frequent waste disposal isn’t practical. Compared to smaller models like the Camco Rhino 15-Gallon Tote, this tank offers more than double the volume, reducing the need for multiple trips to the dump station. Its UV-stabilized HDPE construction ensures durability against outdoor elements, while large wheels and a sturdy handle make transportation across rough terrain manageable. However, at 45 pounds, it can be cumbersome to lift, especially when full, which may pose a challenge for users with limited strength or mobility. This model is best suited for RV owners who prioritize capacity and durability over ease of handling for occasional use. The included accessories, such as a tank rinser and gate valve, further streamline waste management, but the weight and bulk could be a drawback for those with limited storage space or physical constraints.

    Pros:
    • Large 36-gallon capacity reduces frequent dumping
    • UV-stabilized HDPE ensures outdoor durability
    • Oversized wheels and large handle facilitate transport over rough terrain
    • Includes useful accessories like a tank rinser and gate valve
    Cons:
    • Heavy at 45 lbs, which can be difficult to lift when full
    • Designed solely for waste, limiting versatility

    Best for: RV owners needing high-capacity waste disposal for extended trips or large families who generate significant waste.

    Not ideal for: Campers with limited storage space or individuals who prefer lightweight, easily portable waste tanks for short-term use.

    • Capacity:36 gallons
    • Dimensions:24 1/8″ (L) x 14 3/4″ (W) x 44 7/8″ (H)
    • Weight:45 lbs
    • Material:UV-stabilized blow-molded HDPE
    • Wheels:Oversized for rough terrain
    • Accessories:Tank rinser, gate valve
    Our verdict
    “This tank is best for RVers who prioritize capacity and durability over ease of handling, especially on long trips.”
grey water tank
What makes a great grey water tank
1
Capacity and Size
Estimating your grey water output helps determine the appropriate tank size.
2
Portability and Handling
Portability features such as wheels, handles, and lightweight materials can make a significant difference.
3
Material and Safety
Materials like BPA-free plastics ensure the tank is safe for grey water that includes potable water or food residues.
4
Ease of Maintenance and Features
Features such as built-in valves, easy-clean designs, and secure lids simplify maintenance and reduce spillage risks.
How to choose your grey water tank
1
How we picked
I evaluated each grey water tank based on key factors that matter to RV owners and campers: capacity, portability, build
2
Capacity and Size
Estimating your grey water output helps determine the appropriate tank size.
3
Portability and Handling
Portability features such as wheels, handles, and lightweight materials can make a significant difference.
4
Material and Safety
Materials like BPA-free plastics ensure the tank is safe for grey water that includes potable water or food residues.
5
Ease of Maintenance and Features
Features such as built-in valves, easy-clean designs, and secure lids simplify maintenance and reduce spillage risks.
Vetted grey water tank ·
The best grey water tank, compared
★ Winner Camco Rhino 15-Gallon RV Porta
Best Overall for Portable Waste Management
11compared

How We Picked

I evaluated each grey water tank based on key factors that matter to RV owners and campers: capacity, portability, build quality, ease of installation, and value. I prioritized tanks that balance size with mobility, especially for those needing to transport grey water over longer distances. Durability and material safety were also crucial, particularly for tanks used with potable water. The ranking reflects a combination of practical features, user reviews, and overall value, ensuring options suit a range of needs from casual campers to full-time RVers.
Everyday → specialist
Everyday & valuePremium & specialist
Which grey water tank fits you?
The everyday user
All-round, reliable
The enthusiast
Premium & high-performance
The gift-giver
Looks & craftsmanship

Factors to Consider When Choosing Grey Water Tank

Choosing the right grey water tank involves considering several factors beyond just capacity. Understanding how your RV setup, travel style, and maintenance preferences influence your choice can save you money and frustration. Here are key considerations to guide your decision.

Capacity and Size

Estimating your grey water output helps determine the appropriate tank size. Larger tanks reduce the frequency of emptying but can be heavier and less portable. Smaller tanks are easier to handle and fit in tight spaces but require more frequent disposal. Think about your typical trip duration and available storage space when selecting capacity to strike a balance between convenience and practicality.

Portability and Handling

Portability features such as wheels, handles, and lightweight materials can make a significant difference. Tanks with built-in wheels or ergonomic handles are ideal for frequent travel or long distances to disposal sites. However, these features often add to the cost and may impact durability. Consider how often and how far you’ll need to move the tank before prioritizing portability over capacity.

Material and Safety

Materials like BPA-free plastics ensure the tank is safe for grey water that includes potable water or food residues. Durability is also key; heavy-duty plastics resist cracking and UV damage. If you plan to use the tank for fresh water or sensitive applications, investing in high-quality, chemical-resistant materials can extend the lifespan and safety of your setup.

Ease of Maintenance and Features

Features such as built-in valves, easy-clean designs, and secure lids simplify maintenance and reduce spillage risks. Tanks with accessible drainage points make regular cleaning straightforward. Consider whether you prefer models with additional features like gauge indicators or compatibility with hoses and fittings, which can make routine tasks more manageable.

Budget and Value

Prices for grey water tanks range widely based on size, features, and brand reputation. While investing in a more durable, feature-rich tank can pay off in longevity, budget options may suit temporary or infrequent use. Focus on balancing cost with essential features that meet your specific needs, avoiding overspending on extras you won’t utilize.

Frequently Asked Questions

How often should I empty my grey water tank?

The frequency of emptying your grey water tank depends on its capacity and your water usage. For typical RV use, a 20-30 gallon tank might need to be emptied every few days during heavy use, while larger tanks can last longer. Regular monitoring and planning your routes to disposal sites can prevent overflows and ensure proper sanitation. Always empty the tank before it reaches capacity to avoid unpleasant odors and potential damage.

Can I use the same tank for grey water and black water?

No, it’s generally not recommended to use the same tank for both grey and black water. Black water contains sewage and requires specialized treatment and disposal, whereas grey water is less contaminated. Mixing them can create sanitation issues and complicate disposal procedures. Using dedicated tanks for each type ensures proper hygiene and compliance with waste management regulations.

What features should I look for in a portable grey water tank?

Key features include sturdy wheels and handles for easy transport, secure lids to prevent spills, and drainage valves for quick emptying. Material quality matters too; BPA-free plastics are safer and more durable. Additional features like built-in gauges or compatibility with hoses can make maintenance simpler. Prioritize these based on how often and how far you’ll need to move the tank.

Is a larger capacity always better?

Not necessarily. Larger tanks reduce the number of times you need to empty them but tend to be heavier and bulkier, which can complicate handling. If your vehicle or storage space limits you, a smaller, more manageable tank might be preferable. Consider your typical usage patterns and physical capabilities before opting for maximum capacity.

How do I clean and maintain my grey water tank?

Regular cleaning with water and mild detergents helps prevent buildup and odors. Many tanks have dedicated drainage valves or removable lids for easy access. Using tanks made of smooth, BPA-free plastic simplifies cleaning, and some models include built-in cleaning ports. Always rinse thoroughly and dry the tank after emptying to prolong its lifespan and maintain sanitation standards.

Conclusion

The best overall choice for most RV owners is the Camco Rhino 36-Gallon Tote Tank, offering a balance of capacity and durability. Those seeking the best value might prefer the RecPro Combo Tank for its versatility and cost-effectiveness. Beginners or occasional travelers should consider smaller, lightweight options like the YITAMOTOR 40L Tank for easier handling. For users prioritizing high capacity and rugged construction, the Camco Rhino 28-Gallon Tote Tank delivers robust performance. Ultimately, your selection depends on your travel habits, storage space, and budget, but these options cover a broad range of needs effectively.

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