Choosing a reliable 55 gallon poly tank is essential for durable water storage, agricultural needs, and on-the-go RV setups. This guide highlights top poly tanks that offer long-lasting UV resistance, easy cleaning, and practical fittings. Below you’ll find five strong options with different features to fit residential, commercial, or mobile requirements. A concise buying guide follows to help compare capacities, materials, fittings, and safety considerations.
| Product | Brand | Capacity | Type / Use |
|---|---|---|---|
| 55 Gallon Fresh Water Holding Tank (T-5500) | Class A Customs | 55 Gallons | Fresh Water / Drinking Water Safe |
| 55 Gallon RV Concession Fresh Water Holding Tank | classAcustoms | 55 Gallons | Fresh Water with 12V Pump |
| RV Fresh and Gray Water Tank Combo Pack | classAcustoms | 46 & 55 Gallons | Non-Pressurized, Fresh/Gray Water |
| 55 Gallon Square Refueling Tank | Aluminum Tank Industries | 55+ Gallons | Refueling/Industrial Use |
| 550 Gallon Poly Tank | RomoTech | 550 Gallons | Water & Non-Flammable Liquids |
55 Gallon Fresh Water Holding Tank By Class A Customs
This 55 gallon tank is manufactured with NSF approved materials, designed for fresh or gray water storage. The tank features two 1.5″ NPT fittings and two 0.5″ NPT fittings, all sealed and watertight when the membrane is in place. The dimensions are 37.5″ long (excluding fittings) by 17.5″ by 19.5″, with a thickness around 7/32″. It supports versatile placement, as it can be oriented in multiple directions. The kit includes carefully positioned fittings intended to withstand typical RV or off-grid usage when not under pressurized conditions. Use plastic adapters to connect hoses for best results.
Key considerations: verify compatibility with your plumbing setup, ensure proper venting for non-pressurized use, and confirm that the tank’s fittings align with your hose connections and mounting space. This option emphasizes safe, NSF-compliant materials suitable for potable applications.
RV Fresh and Gray Water Tank Combo Pack (46 & 55 Gallons)
The combo pack offers two tanks, a 46 gallon and a 55 gallon unit, both NSF approved for fresh or gray water. Each tank includes built-in fittings (two 1.5″ NPT and two 0.5″ NPT) and is designed as non-pressurized to avoid dangerous pressure buildup. The tanks require venting and are intended for gravity filling. This setup is ideal for RV enthusiasts who need to expand capacity or create separate lines for fresh and gray water. Proper installation and venting are essential for safe operation.
RomoTech 550 Gallon Poly Tank for Water & Non-Flammable Liquids
This large, durable polyethylene tank is UV-stabilized and rustproof, suitable for water and non-flammable liquids. It’s designed for long outdoor use in agricultural settings, irrigation, and off-grid storage. A wide fill cap and built-in drain facilitate quick refills and controlled emptying, while a molded bulkhead fitting supports fast siphoning or hose connections on-site. While not a typical shallow 55-gallon unit, its substantial capacity makes it a versatile option for bulk liquid storage and mobile setups requiring more volume.
RomoTech 50 Gallon Horizontal Square Reservoir
Although it’s a 50-gallon model, this UV-stabilized polyethylene tank is designed for non-flammable liquids and offers a large fill cap, integrated drain, and a molded bulkhead for easy attachment of hoses and siphoning. It’s well-suited for agricultural uses, temporary work sites, and RV water storage where a rugged, outdoor-ready reservoir is needed. The unit’s durable construction provides a good fit for environments that demand resilience against sun exposure and routine handling.
Buying Guide: Key Purchase Considerations
- Capacity and configuration: Decide whether you need a single 55-gallon tank, a combination of 46 and 55 gallons, or a much larger option like 550 gallons. Consider your space, mounting options, and whether you require horizontal or vertical orientation.
- Material quality and safety: Look for NSF-approved materials for potable water, UV-stabilized polyethylene to resist sun damage, and rustproof construction for outdoor durability. Non-flammable liquid compatibility is an added benefit for certain applications.
- Fittings and venting: Check the number and size of fittings (NPT sizes), whether fittings are sealed, and if the tank is designed for vented, non-pressurized use or pressurized connections. Plan for compatible hoses and plastic adapters to prevent thread damage.
- Maintenance and cleaning: A wide fill cap, built-in drain, and molded bulkhead fittings simplify cleaning and routine maintenance. Consider ease of access for sanitation in potable applications.
- Portability and installation: Consider the weight when full, the availability of mounting points, and whether the tank can sit on its side or require specific orientation. For RV and mobile uses, ensure compatibility with existing pumps and gravity-fill methods.
- Regulatory and safety considerations: For potable storage, confirm NSF/ANSI compliance and ensure the tank is rated for drinking water. Follow local codes for storage of chemicals or gray water in mobile setups.
Across these options, buyers should align product features with their specific needs—whether for safe drinking water in a mobile RV, bulk water storage on a farm, or robust storage for non-flammable liquids in harsh outdoor environments. The selected tanks emphasize durability, modular fittings, and versatility in both stationary and mobile configurations.
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