Method 1: First check which faucet is causing the noise, and just change that pipe to a PVC pipe. Method 2: From now on, when you turn on the faucet, you should open it slowly and close it slowly. It will not make any sound when it is in the appropriate position. Just adjust the water inlet of the washing machine to a smaller size, so that it will not affect the use. Method 3: Turn down the main water valve.