I don't have an answer for you but I know there are some trailers with 'fancy' water fills that eliminate the gravity fill that I'm use to. Why do you need this?
The reason I ask is the only time I can think of absolutely needing this is to add water from an external tank if dry camping someplace. If you need to to add something for sanitation there are other methods....for instance I usually sanitize my water system at the "house end" of my fresh water hose by pouring the bleach into the hose prior to turning on the water and slowly fill the hose to somewhat let it mix and then sit in the hose for 30 minutes before connecting to the tank.
If off base, sorry just curious.
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JXNBBL (Jay)
Jackson, NH
2021 Keystone 330BHS
2023 Ram 3500 6.7L diesel, 3.73 ratio
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