Step 1
Find the Kohler cold water supply line. It's made of copper and has a white tag around it that says “Cold.”
Step 2
Look on the opposite side of the white tag to find the product number (P/N). Kohler refers to the serial or model number of a faucet as the product number.
Step 3
Write down the Kohler faucet P/N, a combination of nine letters and numbers. Use the product number to access model information such as warranty or service specifics.