Leak Search Level 01 Repairs Leak on 3/4" copper waterline supplying hot water for kitchen faucet and dishwasher. Opened cabinet under kitchen sink to locate leak. Cut out leaking section of copper. Installed new 3/4" copper, emergency stop for dishwasher and faucet. Installed new supply line on hot side for kitchen faucet. Tested, no leaks found at this time.