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How to Replace a Bathtub Overflow Gasket and Caulk a Toilet Base

Home inspector and Finders Fixers host Tim Hockenberry shows how to remove and replace a bathtub overflow gasket, and how to properly caulk the base of a toilet with these instructions.

More in Plumbing

  • Time

    30 Minutes

  • Price Range

    $1 - $50

  • Difficulty

    Easy

Highlights:

Step 1: Remove the Overflow Drain Cap

First, remove the overflow drain cap using a screwdriver. Once it's open, remove the old drain seal using pliers.

remove overflow drain cap using screwdriver

Step 2: Put the Screws in Place

To replace the new gasket, put the screws in place to help push the drainpipe back. Be careful not to push too much to avoid cracking the plastic pipe.

push drainpipe back and secure

Step 3: Replace the Cap

Replace the cap back on with screws creating a tight hold between the gasket and the tub, and the drain tight to the gasket. Again, make sure not to over-tighten the screws to avoid breaking the plastic drain pipe.

place cap back on with screws

Step 4: Seal the Toilet

Use a common tube of bathroom caulk to seal the base of the toilet. This will seal the area from any overflow water flowing underneath the toilet. Start by drawing a bead of caulk around the base of the toilet. Use a wet finger to wipe along the bead caulk. This will help fill any gaps and clear away any excess.

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