Originally Posted by ThomasE
If I tow my trailer with the gray tank full or almost full, water sloshes up the drain into the shower pan. Will a Hepvo valve in the shower drain installed horizontally prevent that?
Yes. I got the parts from LHC a couple weeks ago and got rid of the torn p trap on our casita
. It also gets rid of the slide valve in the shower drain line, which on this model was outside. And I also did the fast grey drain mod which was well worth it. Good stuff.