I wanted to share this picture of what I did with our Unity TB in adding an onboard pressure washer that I purchased from www.TheRoadWave.com . I like having a clean RV and a bug-free windshield and this is the perfect way to do it. I can foam up the whole Van and literally wash it down in 10 minutes. It uses the water on board our system so I can do it from anywhere. The Cost was about $1200 well worth it. I also added a stainless steel tray to the bottom that I made myself so that if water does get in there it drains out the back corner onto the ground. You can't see behind the hose real but I also have added an on board central vac.
Does RV Wave have a web site? Tried search no luck
Go to The Road Wave – 844.549.9283 info@theroadwave.com (http://www.theroadwave.com) . I purchased the "Elite" package. If a tray is needed I can make you one powder coated for $75.