Yeah, hook it up when the water is cold and let gravity feed the tankless WH.. Very interesting idea me thinks , no pressure but it will wet you body when it need it The only thing you need to worry about with a tankless heater is not having any water in it. It will burn up without water in seconds or minutes.I might have to hook up my Roadshower4 to a tankless water heater and see what happens
Actually I considered building one of these roof contraptions myself. It can be built for around $100 and is not a big challenging project for someone with basic skills or knowledge of a pressurized vessel and how it works. I watched several YouTube videos on this shower devise. Then one day I watched a Bob Wells video he made on how you can shower when on the road (His people live out there 24/7/365) . I watched and he offered 6-7 ways to do it all of which were economical and practical (some people could care less) . I liked that idea because off roading is not cheap and I live on a fixed income as do many off roaders, travelers, and OB'rs. I want my money to go as far as possible and if I can find a place to do it cheaply I will and spend the extra money for the more needed things (like new tires etc.) Anyway after watching Bob's video I said to myself, fool.. there is a cheaper way and maybe even better. I chose one of his methods and it works just fine and only cost me $19.95. My extra savings went towards buying my solar system that is far more important to me than a $500 Chinese made water tank on my roof rack that I don't have anyway.