Location of Fill Ports on Valterra RV Water Tank

Updated 07/27/2025 | Published 07/20/2025

Products Featured in This Question

Valterra RV Water Tank - Non-Toxic - ABS Plastic - 48" x 8" x 16" - 24 Gallons

(57)

$221.32

Front Runner Water Tank - Rectangular - 17.7 Gallons

(1)

$285.59

Question:

How can you fill this? I don’t see a fill port. Or does it require a pressurized water supply?

asked by: Elliott C

Expert Reply:

Hi Elliott; the Valterra RV Water Tank # R8048 has three 3/8" threaded fittings on each end of the tank. You can see them in the attached picture, one has a red plug. The tank is only designed to be gravity fed or used with a hand pump, not an electric water pump.

What are you using the water tank for?

expert reply by: Robin H

3/8" Threaded Fittings
(click to enlarge)

Elliott C.

7/27/2025

I want to put it in the back of my truck bed to use for camp cooking and showers. I was hoping it would have a large fill cap on top so I can fill it with a garden hose. Sounds like this is not a good fit. I guess you’d have to connect a fill hose and plumb it to a fill hole somewhere else, like in an RV.

Robin H.

7/27/2025

@ElliottC ah yeah, this is definitely designed for RV use. Something like the # FR52DJ would work and has a large fill port on top with a 1/2" barb fitting for a hose on the bottom. However, it has a smaller capacity at 17.7 gallons.