Forum Discussion
CarlGeo
Oct 24, 2014Explorer
nomad297 wrote:Turbo Diesel Dude wrote:
Toilets DON'T have "P traps" The water on top of the valve keeps the smell in. Only drains have the traps. That's why your household commode has the water I it. JMHO
It's not the water that keeps the smell in on an RV toilet. It is the seal on the valve that does that. Water standing in the RV toilet is only there because the rubber seal won't allow it to go by. Residential toilets do have traps -- just not p-traps -- they are s-traps.
I don't know of any RV toilets with traps.
Bruce
You state correctly that residential toilets do not have P traps, but S trap built into the toilet itself. The standing water in the toilet is the seal.
RV toilets have a rubber seal around the valve that keeps water in the toilet bowl, and that standing water is the vapor seal. Should the seal not hold water, you will have no vapor seal and you will get sewer gas into the coach.
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