Best Potable Water Tanks With Pump for RVs and Mobile Use
The best potable water tank with a pump depends on how much water you need and how much installation space you have. The Class A Customs 21-gallon tank is best for compact setups, while its 35- and 50-gallon kits offer more capacity with a 12-volt pump and basic plumbing parts. For extended trips or higher demand, consider the 65-gallon kit. A separate 30-gallon Class A Customs tank also includes a pump, but requires careful venting during installation.
| Tank | Capacity | Best For | Pump Included |
|---|---|---|---|
| Class A Customs T2100BPK-P | 21 gallons | Smaller RVs and limited storage space | Yes |
| Class A Customs T3500BPK-P | 35 gallons | Balanced storage and included plumbing | Yes |
| Class A Customs T5000BPK-P | 50 gallons | Longer trips or greater water use | Yes |
| Class A Customs T6500BPK-P | 65 gallons | High-capacity RV water storage | Yes |
| Class A Customs T-3000-PUMP | 30 gallons | Buyers seeking a mid-size tank-and-pump setup | Yes |
Class A Customs 21-Gallon Tank Kit
This 21-gallon kit is best for a compact RV, camper, or tiny-house setup where storage space is limited and water use is moderate. It includes a 12-volt on-demand pump and a basic plumbing kit with fill hose, barbed fittings, a PVC drain adapter, and clamps.
The tank is made from NSF-certified food-grade medium-density polyethylene and has two 1.5-inch and two 0.5-inch female NPT ports. Its smaller capacity is the main trade-off: choose a larger tank if you need to go longer between refills. The listing describes it for potable water uses such as drinking, cooking, showering, and washing dishes.
Class A Customs 35-Gallon Tank Kit
Choose this 35-gallon option if you want a middle-capacity tank with the pump and basic plumbing parts bundled. It is intended for RVs, motorhomes, trailers, campers, food trucks, and tiny houses. The tank is made in the United States from NSF-certified food-grade materials.
Four threaded ports provide connection options, and the tank material is described as weather- and impact-resistant. The included plumbing kit is a starter kit, so check that its fittings and hose suit your planned installation. Its capacity is greater than the 21-gallon model but less than the 50- and 65-gallon kits.
Class A Customs 50-Gallon Tank Kit
The 50-gallon kit is best for buyers who need more reserve water for longer trips or frequent cooking and washing. It includes a 12-volt on-demand pump, fill hose, barbed fittings, a PVC drain adapter, and clamps. Its NSF-certified food-grade material is specified for potable water use.
Two 1.5-inch and two 0.5-inch female NPT ports support the plumbing layout. Before choosing this larger tank, measure the intended compartment and confirm that it can support a full tank’s weight. The supplied plumbing is described as basic, so additional installation parts may be needed for a particular setup.
Class A Customs 65-Gallon Tank Kit
This 65-gallon kit is best for high water demand, such as extended travel or a mobile setup serving multiple daily needs. It includes the same type of 12-volt on-demand pump and basic plumbing kit as the smaller kits. The tank is made from NSF-certified food-grade material and has four threaded connection ports.
Its main limitation is its size and filled weight, which require careful planning for placement and support. Choose this model only after confirming available space, access for filling and maintenance, and the load capacity of the installation area. A smaller tank may be more practical for a lightweight or space-constrained vehicle.
Class A Customs 30-Gallon Tank With Pump
This 30-gallon tank-and-pump option is best for buyers who want a capacity between the 21- and 35-gallon kits. The listing identifies it as a fresh and drinking-water-safe tank made from NSF-approved materials and includes a 12-volt water pump. Its stated dimensions are 34.5 by 12 by 17.5 inches, excluding fittings; it can sit on any side to change its orientation.
Installation requires special care: the tank is non-pressurized and must be vented so air can move in and out. The listing warns against connecting a garden hose as a sealed, pressurized fill line. Follow the supplied product directions and plan a gravity-fill method.
Buying Guide: How To Choose A Potable Water Tank With Pump
How much capacity do you need?
Estimate daily water use and the time between refill opportunities. A 21-gallon tank can suit a smaller setup, while 35 or 50 gallons offer more reserve. A 65-gallon tank is for buyers who have room and need greater storage. Capacity alone does not determine suitability; the filled tank’s weight and mounting support matter too.
Does the kit include the plumbing you need?
Compare the included pump, hose, fittings, drain adapter, and clamps against your planned layout. A starter plumbing kit can reduce the number of parts to source, but it may not cover every installation. Check port sizes and fitting types before purchasing, and avoid forcing or overtightening threaded connections.
Is the tank designed for potable water?
Look for clear material and intended-use information. The Class A Customs kits in this selection are described as made from NSF-certified or NSF-approved food-grade materials for fresh or drinking water. Keep the tank clean, use it for its stated purpose, and follow the manufacturer’s care instructions.
What should you check before installation?
Measure the available space, including room for fittings, hoses, filling, and maintenance. Confirm that the mounting area can support the filled tank. Also determine whether the tank requires venting; the 30-gallon T-3000-PUMP listing specifically says it must be vented and must not be sealed to a pressurized garden hose.
Frequently Asked Questions
Do these potable water tank kits include a pump?
The four BPK-P kits listed here include a 12-volt on-demand pump. The 30-gallon T-3000-PUMP listing also specifies a 12-volt pump.
Which tank is best for a compact RV?
The 21-gallon kit is the smallest option in this selection and is best suited to buyers prioritizing a lower-capacity tank for limited space.
Can a potable water tank be filled under pressure?
Do not assume that every tank is designed for pressurized filling. The 30-gallon model is explicitly non-pressurized, must be vented, and is described for gravity filling rather than a sealed garden-hose connection.
What is included with the BPK-P plumbing kit?
The listed starter kit includes a fill hose, barbed fittings, a PVC adapter for draining, and clamps, along with the 12-volt pump.