Finding reliable RV water tanks is crucial for safe drinking water, kitchen and bath needs, and long trips off the grid. This guide highlights top options sized for a range of RV setups, from compact 16–20 gallon tanks to large 100 gallon reservoirs. Each pick is designed for durability, potable-safe materials, and adaptable fittings to fit common RV plumbing layouts. Use this overview to compare capacities, materials, and installation options before purchasing.
| Product | Brand | Capacity | Type |
|---|---|---|---|
| classAcustoms Combo Pack — 30 & 40 Gallon | classAcustoms | 30 + 40 Gallon | Fresh/Gray Water Tanks |
| Ameri-Kart 36 Gallon Fresh Water Tank | Ameri-Kart | 36 Gallon | Fresh Water Tank |
| Class A Customs 40/46 Gallon Combo | classAcustoms | 40 & 46 Gallon | Fresh/Gray Water Tanks |
| RecPro 100 Gallon RV Tank | RecPro | 100 Gallon | Fresh/Gray Water Tank |
| Ameri-Kart 20 Gallon Fresh Water Tank | Ameri-Kart | 20 Gallon | Fresh Water Tank |
Class Acustoms RV Fresh and Gray Water Tank Combo Pack — 30 & 40 Gallon
The combo includes one 30 gallon and one 40 gallon tank designed for RV fresh or gray water use. Manufactured with NSF-approved materials and suitable for drinking water in compliant applications. Tanks feature built-in fittings at two 1.5″ balloon-style NPT standard ports and two 0.5″ NPT ports. A note on operation emphasizes vented, non-pressurized use, preventing direct garden hose connections to avoid pressure-related damage.
Ameri-Kart 36 Gallon RV Fresh Water Tank
Designed for potable water storage in RVs, this 36 gallon tank is made in the USA from BPA-free materials. It supports multiple installation options with built-in fittings, including two 1.5″ and two 0.5″ NPT standard ports. The construction focuses on durability, leak resistance, and compliance with IAPMO standards for safe water storage in mobile living spaces.
Class A Customs — 40 & 46 Gallon Fresh/Gray Tank Combo
This pair uses NSF-certified MDPE resin with UV stabilization. The kit includes two 1.5″ balloon-style NPT fittings and two 0.5″ NPT fittings, enabling flexible installation in various RV configurations. The materials are designed to resist environmental factors while maintaining water compatibility for fresh or gray water storage.
RecPro RV Fresh Water Tank — 100 Gallon
With a 100 gallon capacity, this tank serves long trips and large RV setups where a steady water supply is essential. Made in the USA from polyethylene, the tank is designed for durability and reliability in mobile environments. It is intended for fresh or gray water use in RVs and trailers, featuring construction that supports long-term travel demands and rigorous use on the road.
Ameri-Kart 20 Gallon Fresh Water Tank
This 20 gallon RV water tank is made in the USA from BPA-free materials for potable water storage, including options for multiple installation locations. Built-in fittings comprise two 1.5″ balloon-style threaded NPT standard ports and two 0.5″ ports. The unit emphasizes durable, leak-proof performance and compatibility with standard RV plumbing fittings, with IAPMO standard compliance implied by the product build.
Buying Guide: Key Considerations For RV Water Tanks
- Capacity and usage pattern: Choose a size that matches your travel frequency, number of users, and typical trip duration. Larger capacities reduce refilling but require more space and weight management.
- Material and safety: Look for BPA-free materials and NSF or IAPMO standards to ensure potable water safety. MDPE or high-density polyethylene are common, offering chemical resistance and durability.
- Fittings and compatibility: Check the size and type of built-in fittings (1.5″ or 0.5″ NPT) and ensure they align with your RV’s existing plumbing and pump setup.
- Ventilation and non-pressurized use: Many RV tanks require venting and should not be connected directly to pressurized hoses. Follow manufacturer guidance to prevent tank damage.
- Portability vs. fixed installation: Some tanks are designed for flexible mounting or rotation to fit odd spaces, while others assume a fixed orientation. Consider your living space and mounting options.
- Maintenance and cleaning: Choose tanks with smooth interiors and reliable seals. Accessibility for cleaning and sanitation reduces contamination risk for potable water.
- Warranty and certification: Favor products with reputable warranties and certifications that back claims of safety and durability for long-term RV use.
When selecting an RV water tank, balancing capacity, installation flexibility, and safety certifications is essential. The options above span compact to high-capacity needs, with a focus on potable use, durability, and compatibility with common RV fittings. Review your vehicle’s dimensions, mounting space, and water system layout to choose the best fit for your adventures.