Thanks for the input...I did end up putting a tankless water heater in and then added booster pumper after that. I had to add the booster pump anyway...city water pressure a lot of days under 40 psi...it would of cost dog owners about 3-4 extra dollars by the time the hot water hit the sprayer and with so little pressure to rinse their dog would of been extra. I wasn't satisfied using my own equipment the way it was so I bit The extra costs and set it up so it works well...it is a good thing after the fact...if I had the dog and carwash hooked up on the same hot water heater I would have run out of water on a daily basis. The car wash this time of year was running out of hot water on its own. I had to go to cold water rinse at the carwash these past 3-4 weeks due to busy season. No customers have complained as long as the soap and wax are warm they seem satisfied. I have to say dogwash has been open for about 10 days it went viral on fb. I sent a friend of mine a single picture she put it on Facebook and it has been shared by 174 people to date. Facebook is an incredible tool. I am working on creating a Facebook page but have to get the second unit up and running. Hoping it is operating by this weekend.