I am looking to put in a Exterior Wash Station on my fifth wheel next to the main door for the kids to wash the mud and sand off there feet there is a hot and cold water line stubbed down next to the steps Dose anyone have in suggestion or tips or tricks
Those stubs are likely the low point drains and you may want to put a tee in the line there so the drains can still be used. Other than that it sound like a feasible mod.
Buy some garden hose, a "y" fitting with shutoffs, and some barb type fittings.
Invert the "Y" hook up to the hot and cold low point drains with little hose pieces and some fittings. Then bring the hose with a spray end off the single end of the "Y" there you go. You have a hot and cold spray faucet at the door and you can just remove it when you leave. No holes or tools required.
I might just do this to mine although not in as accessible area as your is. But always good to have.
__________________ A rainy day camping is better than any sunny day at work
2004 F250 V10 SD Xcab 2011 Wildwood T26BHXL