We had a leak, so we had the water line and sewage line from the house to the street replaced. Now we have no water in the shower. Some debris most have clogged up the line coming into the shower. All the other lines are fine. My Dad is somewhat of a handyman and wants to fix the problem himself. If he takes the knobs off the faucet, water shoots out those pipes. If he hooks a water hose up to the faucet, water comes out the shower head fine. What is the easiet way to locate this problem or flush the debris out?