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Test for Leaks — Dry-Fit the New Assembly

Beginner

Part of project

How to Replace a Bathtub Waste and Overflow Drain Assembly · Step 6 of 9

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After the tub is in place, turn on the water using the faucet to fill the tub. Allow some water to accumulate. Test the pop-up drain and the overflow to ensure they function correctly. Critically, check for any leaks around the base of the tub where the tailpiece connects to the floor drain before finishing the installation.

Goal: Verify a leak-free installation

  • It's better to find and fix a leak now than after the tub has been permanently caulked to the floor.
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FAQs

How long should I expect this bathtub drain replacement project to take, especially if I'm a beginner?

For a beginner, plan to dedicate 3-5 hours for this project, including preparation and clean-up. Accessing the old drain and ensuring proper sealing of the new one can take time, so don't rush the process to avoid potential leaks later on.

What are the most common mistakes beginners make that lead to leaks after installing a new bathtub waste and overflow?

The primary cause of leaks is inadequate sealing. Ensure you apply a generous amount of plumber's putty (like Oatey 14 oz. Plumber's Putty) under the drain flange and correctly position and tighten the overflow gasket. Always perform a thorough leak test before re-enclosing any access panels.

Do I need special tools to remove a stuck or corroded old drain flange, or will standard tools suffice?

While a screwdriver and tongue-and-groove pliers (Channellock 430/440) are often sufficient, a severely corroded flange might require a specialized drain wrench or carefully using a hacksaw (Husky 10 in. Close Quarters Hacksaw) to cut the crossbars. Avoid excessive force to prevent damaging the tub's finish.

What are the most important safety precautions I should take during this bathtub drain replacement?

Always turn off the water supply to the bathtub before starting to prevent accidental flooding. Wear safety glasses to protect your eyes from debris, and ensure good ventilation if using plumber's putty or sealants. A drop cloth (TRIMACO Stay Put Canvas Plus) will protect your bathroom floor and catch any spills.