LJAZ

I don't think you need to because the shower pan has a lip that runs up behind the wall so the water can't really go anywhere and if any...

CruiserRV and Heartland are both owned by Thor Industries so maybe they share resources for design and/or customer support

The image on the right is what you want. You'll need to able to turn that outside collar to attach it to you drinking water hose male...

I have the brochure from 2006 and the specs it lists are Lex said 38 for black & gray, 36 for fresh. Here's a copy.

Camping World has a pretty wide selection of parts and depending on where you live there may be an actual store nearby where you can...