OK--I'm not smart enough to know how to post photos to this site, but I did get an exterior shower installed! After two attempts to get a schematic through the HiLo suppliers, I decided not to chance cutting a hole in the side of my camper. My first thought was to cut through the rear wall where my sink is located and plumb a hot and cold line from the two sink lines--but my 2009 unit most probably has beams there for strength. After crawling under the unit, I decided to buy 2--1/2" Sea Tech "T" fittings and slide them over the two tubes extending through my floor from the factory. (designed to be used to drain the pipes for winter) I then stuck about 6-8" of flexible 1/2" tubing--found at any ACE store--on one end of the "T", then capped it with a Sea TEch shut off valve. The Sea TEch fittings cost about $6 each. On the other end of the "T" fitting, I connected sections of white 1/2" Pex pipe purchased at Lowes for $28 per 100'. I ran it both hot and cold lines with insulation through the open rectangular channel welded to the axle just inside my wheels, back along the undercarriage above the sewer drains, then attached them with plastic ties as I bent them toward the center of the rear bumper, where my spare tire bracket is bolted on. Previously, I took the spare tire off and welded a metal "T" bracket on top using 2" electrical unistrut channel, which houses spring nuts used to screw the shower box on to. A ten foot bar of unistrut costs $20, and the spring nuts and 1/4" bolts are cheap at any electrical supply place. The top member of my strut is 18" wide and the middle "T" portion is 18" tall. I can "tack" weld good enough to hold it in place and a can of black Rustoleum will make it match the existing spare tire bracket I welded it on top of. I attached the 1/2" Pex tubing with two female 1/2" Sea TEch elbows and drilled two 1/4" holes in the plastic shower box I purchased from Good Sams for $40. It comes with a key to open and close the lid. Mine is held in place by a piece of wire and the spare kept in the HILO. I can send photos to anyone wanting to do something similar if I have your cell number. E-mail me at
cole@pdq.net. My pex is also insulated with gray foam purchased from Lowes and I can drain it easily by keeping my inside valves open and controlling it with the ones I added to the flex tubing. It works for me!