Utilize the wasted space around your camper van rear wheel wells to add fresh water storage with our Ram Promaster 28-Gallon Wheel Well Water Tank (PM-C-28). The Ram Promaster 28-Gallon Wheel Well Water Tank (PM-C-28) is designed to fit any Ram Promaster van, snugly fitting against the wall and around the wheel wells. The Ram Promaster 28-Gallon Wheel Well Water Tank (PM-C-28) will also fit Mercedes Sprinter and Ford Transit vans but there will be a large gap around the top of the wheel well.
Ram Promaster 28-Gallon Wheel Well Water Tank (PM-C-28) fits on either side of the vehicle and accepts 1/2″ (black plugs) and 1-1/2″ (need to be drilled) NPT fittings.
Northwest Conversions manufactures the tanks with ports on both ends and the top to help meet your layout and plumbing needs. There are additional ports on top for filling or for installing a sensor to monitor the level.
This water tank is designed and fabricated by our friends at Northwest Conversions in Bellingham, Washington. Please allow 1 week for shipping as they are a one-man operation. Northwest Conversions will not ship water tanks to Canada.
All Northwest Conversions Camper Van Water Tanks are TEI Tested & RVIA Approved!
The RV Industry Association (RVIA) has adopted standards for the construction of RVs, including those falling under the ANSI, NEC, NFPA, and other national accreditation associations. Products are tested and verified by independent listing agencies – in this case, Testing Engineers International (TEI). This guarantees that member manufacturers such as Northwest Conversions build their products to conform to standards based on safety and quality, but also ethical and sustainable business practices and community engagement.
Purchasing your Northwest Conversions camper van water tanks from Nomadic Supply Company means that you’ll receive products you can depend on. Designed and built in the US according to the highest standards in the industry, Northwest Conversions provides the parts you need while helping to provide greater opportunities for safely exploring our wild lands now and in the future.
Ram Promaster 28-Gallon Wheel Well Water Tank (PM-C-28) Features:
- Water Tank has a 28-Gallon capacity
- Water Tank Accepts variety of universal fittings
- Water Tank works on either side of of the van
- Water Tank is centered over the wheel well
- Water Tank can be used on either driver or passenger side
- Water Tank has (2) 1.5” NPT ports (need to be drilled out) and (2)1/2” NPT ports on either end.
- Water Tank has (1) 1.5” NPT port (needs to be drilled out) on top or fill or level sensor.
- Water Tank is designed for non-pressurized systems. The tank must be vented.
- Water Tank is made from BPA Free Food Grade Plastic and can be used for fresh or grey water.
- Water Tank External Dimensions: 48” long, 14” deep, 20” tall
How to Install Our Camper Van Water Tanks:
The first step is to always orient the water tank so that our logo, NW Conversions, is facing up, on the top of the tank. The top of the water tank will also always have a 1.5 inch water level sensor location or water fill port. All of the water tank ports are 1.5″ and .5″. The .5″ ports will be provided with plugs in them. Use a 3/8″ T-handle Allen key tool to remove the plugs. Reinstall the plugs in unwanted ports along with using plumber’s tape to seal the threads.
The 1.5″ ports have a membrane that is water tight. To remove this membrane use a 1 3/4″ hole saw that is slightly smaller than the threads to drill your desired 1.5″ ports out. Make sure to clean all loose plastic particles out of the tank before installing the fittings. This is easiest to do with an air compressor or vacuum. Once again, use plumber’s tape or pipe sealant on all fittings.
How to Clean Our Camper Van Water Tanks:
Make sure you rinse the water tank before first use, as there can be plastic bits left in the tank from the manufacturing process.
Nomadic Supply Company recommends using our Lippert Floë Compressed Air Camper Van Fresh Water Flushing System throughout the year to keep your water system completely pristine. In addition to flushing your water system you can also use bleach or vinegar to clean our fresh water tanks, or you can one of our camper van fresh water tank cleaning solutions. To clean your tank with bleach or vinegar follow the instructions below.
Step 1: Drain the water tank completely
Step 2: Mix 4 oz bleach or vinegar with 1 1⁄2 gallons of hot water
Step 3: Pour bleach/vinegar solution into tank
Step 4: Fill tank with fresh water until its full
Step 5: Let sit for 12 hours
Step 6: Drain the water tank completely, refill with fresh water and drain completely again (you may need to repeat this rinse step a few times)
Camper Van Water Tank Venting:
Polyethylene camper van water tanks must be vented. These fresh water tanks are not designed to handle pressure or a vacuum. A vent is necessary because as the tank is filled or emptied of its liquid an equal proportion of air must be displaced simultaneously. Discharge of a water tank without a vent would cause a vacuum to occur. A generally accepted rule concerning vent size is that it should be the same size as the tank’s largest outlet.
WARNING: This product may expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to