MEP001
Well-known member
A lot of you have probably never seen anything like this, but in the 70's and 80's many car washes used what was basically a well pump setup for low pressure delivery to the bays. It would have a pump, a bladder tank, a pressure switch to keep it pressurized, and there had to be a check valve to keep the pressure trapped in the tank. This was fine for foam brush, but some equipment manufacturers and operators started using the same setup for tire cleaner. Some of those used copper lines to the bays, and 1/4" soft copper has up to 5000 PSI burst pressure. I personally know of two operators who had a check valve in a bay fail and had the bladder tank burst and launched through the roof. One of them showed me where the tank crashed back down through the roof and back into the room. If you're a fan of Mythbusters, you know that a water heater tank will reach up to 750 feet when it explodes.