Step 1 · Shut Off the Water Supply
Locate the main water shut-off valve for your house. This is typically a lever or wheel-style valve found in the basement, a crawlspace, or a utility closet near where the water line enters the house. Turn the valve handle clockwise until it is firmly closed. To confirm the water is off and to relieve pressure in the pipes, go back to the shower and turn the faucet to the 'on' position. Also, open a sink faucet nearby. Let any residual water drain out completely until the flow stops.
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