I have a leak coming from under my kitchen sink. I replaced the cartridge, but it is still leaking. It appears to be coming either from somewhere just below the cartridge, or from the connections to the cold water supply. What is the best plan of action?

Wrap tissue paper around each supply tube going up to the faucet... see if that isolates things!

Also, a flashlight and a towel go a long way here. Simply crawl in, dry everything up and then have someone turn the faucet on to both hot and cold water flow while you watch from underneath.

Try these things and if it helps you, please let us know what you find!

Mark