@AdamPWC I have three custom made soft wash systems. 2 in the back of trucks, and one on a trailer. The truck systems have 100 gallon water tank, 60 gallon SH tank, 7 gallon soap tank, 2 12 volt pumps for applying and a booster pump to rinse with. I also have a generator mounted on the truck to run the booster pump. The trailer system is the same, but instead of 12 volt pumps, I have air pumps. And like the 12 volt system, there are 2 air pumps. This is just for back-up, in case there is a problem with a pump, you just switch a valve and continue.
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