How To Fix Leaking Kitchen Sink. Worn Out Washer Can Cause a Leaking Kitchen Sink Drain Most common reason for a sink to leak. If this is the case you may just need to replace the sealant to repair the leak.
Drains are typically sealed with some kind of putty or sealant to keep it from leaking but this putty could have been put on too thin or it could dry out and crack over time. Replacing the O-ring should fix the problem. If everything looks okay and the sink is still leaking take the entire thing apart and inspect every part to see if its cracked or damaged.
Check for leaks then push the trigger and check again.
If this is the case you may just need to replace the sealant to repair the leak. A 30 second fix for the leaking kitchen sink with the shortcut methodQuality kitchen product. If theres a leak under the kitchen sink while the water is running but not draining then the leak is in your water supply. Replace any damaged parts then reinstall it.