Hey Kid,Originally Posted by citykid
Turn the water off at the hot water heater. Open the farthest hot water faucet in the system to prevent a vacuum lock and drain off a few gallons from the water heater boiler drain, you do not need to drain it completely.
You may now replace the hot water shut off to the washer and after that you may install your new washer. After everything's installed turn the water back on and let the air bleed of out of the faucet you opened. When water comes out of the faucet the system's pressured up readyto use.
Good luck, Tom