If you have a leak under your kitchen sink, the sink strainer may be the cause
Fixing under-the-sink leaks is a project most homeowners can take on. These leaks are typically caused by a bad seal between the sink and the sink strainer. This guide will teach you the best way to fix the problem.
WHAT YOU NEED FOR THIS PROJECT
Tip: The sink strainer assembly has quite a few nuts, washers and gaskets. Keep the parts in order as you remove them, and keeping notes or take a picture to help with putting everything back together. You may also need an extra pair of hands to hold the strainer in place with needle-nose pliers when you reattach the locknut.
Loosen the slip nuts from both ends of the tailpiece with water-pump pliers. Next, remove the tailpiece.
Use a basket strainer wrench to remove the big drain locking ring under the strainer. If it won’t budge, loosen it by placing a screwdriver on the lugs and tapping the screwdriver with a hammer. Next, unscrew the locknut and remove the strainer assembly.
Use a plastic putty knife to scrape off the old putty on the drain opening. If you’re reusing the old strainer body, clean off the old putty under the rim of the strainer.
Apply a bead of putty to the underside of the drain flange then insert the drain into the sink.
From beneath the sink, place a rubber gasket and metal or fiber friction ring over the strainer. Secure the gasket and friction ring by screwing on the drain locking ring. Next, make sure the drain compression seal is seated properly in the drain locknut, then reinstall and tighten the drain locknut. Lastly, turn on the water and test for leaks.