Why does my water pump have a bypass tube?
Why does my water pump have a bypass tube? Disconnect the lines going to and from the heater core, start the engine and the reasons for a bypass tube become immediately obvious. The water pump will continue to send a steady stream of coolant to the core, which will spray all over the engine bay. Can a bypass valve be opened on a water softener? If your water softener uses an external bypass valve (the lower plumbing design in our sketch), CLOSE the inlet and outlet valves and OPEN the bypass valve that in essence is a shunt that bypasses...