Install Overflow Assembly — Install the New Gasket
Part of project
How to Replace a Bathtub Overflow Drain Gasket · Step 5 of 7
In this video
Next, install the overflow assembly. Apply a bead of sealant to the back of the bathtub around the overflow opening. Also apply sealant to one side of the tapered overflow gasket and place it onto the overflow pipe fitting. Press the overflow assembly firmly against the back of the tub, aligning it with the hole. From inside the tub, place the chrome overflow cover plate and secure it by tightening the provided screw with a screwdriver. Do not overtighten. Once the overflow is secure, ensure all slip nuts on the PVC drain pipes are hand-tightened to secure the connections.
Goal: Seal and install the overflow assembly
- Hand-tighten the PVC slip nuts first, then give them a final quarter-turn with channel lock pliers if needed, but avoid over-tightening plastic threads.
Used in this video
- Screwdriver (Tool Type: Hand Tools, Power Source: Manual) — Tightening the screw that holds the overflow cover plate in place.
- Caulking Gun (Tool Type: Hand Tools, Power Source: Manual) — Applying sealant from a tube.
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FAQs
How difficult is replacing a bathtub overflow gasket, and what's a realistic time commitment for a beginner?
This is considered a beginner-level plumbing DIY project, primarily involving simple disassembly and reassembly. While the estimated time is 2 hours, allow yourself extra time, perhaps 3-4 hours, especially if the old gasket is stubborn or significant cleaning is required, to avoid rushing.
What should I do if my bathtub overflow still leaks after replacing the gasket?
First, ensure the new gasket is properly seated and the overflow cover plate screws are tightened snugly, but not overtightened, which can warp the plate. If the leak persists, carefully inspect the mating surfaces for any remaining debris, cracks, or imperfections on the tub itself or the overflow pipe that could be preventing a complete seal. You might need a thin bead of plumber's putty or silicone sealant around the edges of the gasket if the surface is uneven.
Do I need all the specific tools and materials listed, or are there acceptable alternatives?
The multi-screwdriver is essential for removing and reattaching the overflow plate. While specific brands are listed, any multi-purpose screwdriver with appropriate head sizes will work. For cleaning, an all-purpose cleaner and rags are crucial; the specific brand isn't critical, but a hydrogen peroxide-based cleaner is effective. The utility blanket is mainly for protecting surfaces, which can be substituted with old towels or cardboard.
What's the best way to remove an old, stubborn, or brittle overflow gasket without damaging the tub?
After removing the cover plate, carefully use a small, flat-head screwdriver or a utility knife to gently pry out the old gasket, working slowly around its edges. If it's very brittle, it might break into pieces, which is fine; just ensure all fragments are removed. Take extra care not to scratch the tub's finish or the overflow pipe's surface during removal.
Install Overflow Assembly — Install the New Gasket
Part of project
How to Replace a Bathtub Overflow Drain Gasket · Step 5 of 7
In this video
Next, install the overflow assembly. Apply a bead of sealant to the back of the bathtub around the overflow opening. Also apply sealant to one side of the tapered overflow gasket and place it onto the overflow pipe fitting. Press the overflow assembly firmly against the back of the tub, aligning it with the hole. From inside the tub, place the chrome overflow cover plate and secure it by tightening the provided screw with a screwdriver. Do not overtighten. Once the overflow is secure, ensure all slip nuts on the PVC drain pipes are hand-tightened to secure the connections.
Goal: Seal and install the overflow assembly
- Hand-tighten the PVC slip nuts first, then give them a final quarter-turn with channel lock pliers if needed, but avoid over-tightening plastic threads.
Used in this video
- Screwdriver (Tool Type: Hand Tools, Power Source: Manual) — Tightening the screw that holds the overflow cover plate in place.
- Caulking Gun (Tool Type: Hand Tools, Power Source: Manual) — Applying sealant from a tube.
Frequently Asked Questions
How difficult is replacing a bathtub overflow gasket, and what's a realistic time commitment for a beginner?
This is considered a beginner-level plumbing DIY project, primarily involving simple disassembly and reassembly. While the estimated time is 2 hours, allow yourself extra time, perhaps 3-4 hours, especially if the old gasket is stubborn or significant cleaning is required, to avoid rushing.
What should I do if my bathtub overflow still leaks after replacing the gasket?
First, ensure the new gasket is properly seated and the overflow cover plate screws are tightened snugly, but not overtightened, which can warp the plate. If the leak persists, carefully inspect the mating surfaces for any remaining debris, cracks, or imperfections on the tub itself or the overflow pipe that could be preventing a complete seal. You might need a thin bead of plumber's putty or silicone sealant around the edges of the gasket if the surface is uneven.
Do I need all the specific tools and materials listed, or are there acceptable alternatives?
The multi-screwdriver is essential for removing and reattaching the overflow plate. While specific brands are listed, any multi-purpose screwdriver with appropriate head sizes will work. For cleaning, an all-purpose cleaner and rags are crucial; the specific brand isn't critical, but a hydrogen peroxide-based cleaner is effective. The utility blanket is mainly for protecting surfaces, which can be substituted with old towels or cardboard.
What's the best way to remove an old, stubborn, or brittle overflow gasket without damaging the tub?
After removing the cover plate, carefully use a small, flat-head screwdriver or a utility knife to gently pry out the old gasket, working slowly around its edges. If it's very brittle, it might break into pieces, which is fine; just ensure all fragments are removed. Take extra care not to scratch the tub's finish or the overflow pipe's surface during removal.