Commercial restaurant water heater repair. Leak on water heater piping. I replaced copper fittings and a section of 1 inch copper pipe. When I turned a heater pilot lite but main valve did not open check for voltage there is 24 volts at valve gas valve must have got wet it needed to be replaced. Install new gas valve and water heater is working. Also Don said no hot water at pre-rinse sink and hand sink, there is hot water now they had no hot water do to the heater gas valve not working. I also put a grey plastic tray over gas valve to protect it from water. Material in notes