Originally Posted by kcarver
When the bypass valve is not activated (in the vertical position) no water comes out of the hot faucets. When it’s bypassed we get cold water out of the hot water faucets. The hot water heater works but just doesn’t want to come through the pipes. Any ideas how to fix?
No fix needed, what you describe is normal.
Both faucet valves share a common outlet, so unless the cold side is completely closed it will bleed through and allow water to come out the hotside.
I use this method to winterize by holding my hand over the faucet outlet , opening both valves with the pump on, thereby back flushing the hot water lines into the tank on which the drain is left open.
If you make sure that the hot side valve is closed you can even use the cold side with an empty hot water tank.