Toilet bowl fills on water tank fill
  • Lisa's RV Experience
    69
    Greetings all,
    I have a Thetford Aqua-Magic Style II toilet in a Class A Winnebago and when I fill the fresh-water tank the toilet bowl fills up. At first I noticed that when I filled the fresh-water tank there was a couple inches of water in the bowl, the last time I used fresh-water tank fill the bowl was almost filled to the top! So I've been using the gravity fill without issue but it's a pain.

    I'd like to use the regular tank fill but I'm not sure how do fix the bowl-fill issue. Google looks like it's the toilet Water Module/Water valve but could it be the water pump? Any advise?

    Thanks in advance.
    Lisa's RV Experience Options
  • Ray
    1.3k
    ↪Lisa's RV Experience
    It sounds like the bowl fill valve on the toilet is getting weak/worn and needs to be replaced. Or sometimes, hard water deposits build up inside them.
    It may seal under normal use pressure, but when filling the fresh tank, there may be less pressure to seal the valve, and a little seeps by. That would be my guess. :)
    There are kits available to replace.
    Ray Options
  • Lisa's RV Experience
    69
    That's what I thought. Thanks Ray.
    Lisa's RV Experience Options
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