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
Place the thick foam gasket over the threads of the overflow elbow. From behind the bathtub, insert the overflow elbow assembly through the overflow hole. From inside the tub, thread the overflow elbow nut onto the elbow. Hand-tighten the nut only until it is snug and the gasket is slightly compressed against the back of the tub to create a seal without cracking the tub.
Goal: Mount the overflow
- Hand tighten only. Over-tightening can damage the bathtub or the plumbing components.
- If there isn't enough room for the thick gasket, use the alternative thin gasket provided in the kit.
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FAQs
What's the most crucial step to ensure the new gasket creates a truly watertight seal?
The most crucial step is thoroughly cleaning the mating surfaces where the gasket sits. Remove all old caulk, soap scum, and debris using isopropyl alcohol and a putty knife to ensure a smooth, clean surface. This allows the new gasket to adhere perfectly and prevents leaks immediately after installation.
What should I do if the old overflow cover plate screws are stripped, rusted, or won't come out easily?
If the screws are stripped, try using a screw extractor kit or needle-nose pliers to grip and turn them. For rusted screws, apply penetrating oil and let it sit for a while before attempting removal. If all else fails, you may need to carefully drill out the screws and replace them with new ones when installing the overflow plate, which often comes with a new kit.
Can I just apply silicone caulk around the overflow plate instead of replacing the internal gasket?
While caulk might offer a temporary cosmetic seal, it is not a substitute for a properly functioning internal gasket. The gasket creates a flexible, internal watertight seal against the tub wall, which caulk cannot replicate effectively for the long term. Always replace the gasket for a durable and reliable seal from the inside out.
How can I confirm that the new gasket is properly sealed and won't leak after everything is reassembled?
After re-installing the overflow cover plate, fill the tub with water past the overflow opening. Let it sit for at least 15-30 minutes, periodically checking underneath the tub (if accessible) and around the overflow plate for any drips or moisture. This crucial 'Test for Leaks' step confirms your work is watertight.
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
Place the thick foam gasket over the threads of the overflow elbow. From behind the bathtub, insert the overflow elbow assembly through the overflow hole. From inside the tub, thread the overflow elbow nut onto the elbow. Hand-tighten the nut only until it is snug and the gasket is slightly compressed against the back of the tub to create a seal without cracking the tub.
Goal: Mount the overflow
- Hand tighten only. Over-tightening can damage the bathtub or the plumbing components.
- If there isn't enough room for the thick gasket, use the alternative thin gasket provided in the kit.
Frequently Asked Questions
What's the most crucial step to ensure the new gasket creates a truly watertight seal?
The most crucial step is thoroughly cleaning the mating surfaces where the gasket sits. Remove all old caulk, soap scum, and debris using isopropyl alcohol and a putty knife to ensure a smooth, clean surface. This allows the new gasket to adhere perfectly and prevents leaks immediately after installation.
What should I do if the old overflow cover plate screws are stripped, rusted, or won't come out easily?
If the screws are stripped, try using a screw extractor kit or needle-nose pliers to grip and turn them. For rusted screws, apply penetrating oil and let it sit for a while before attempting removal. If all else fails, you may need to carefully drill out the screws and replace them with new ones when installing the overflow plate, which often comes with a new kit.
Can I just apply silicone caulk around the overflow plate instead of replacing the internal gasket?
While caulk might offer a temporary cosmetic seal, it is not a substitute for a properly functioning internal gasket. The gasket creates a flexible, internal watertight seal against the tub wall, which caulk cannot replicate effectively for the long term. Always replace the gasket for a durable and reliable seal from the inside out.
How can I confirm that the new gasket is properly sealed and won't leak after everything is reassembled?
After re-installing the overflow cover plate, fill the tub with water past the overflow opening. Let it sit for at least 15-30 minutes, periodically checking underneath the tub (if accessible) and around the overflow plate for any drips or moisture. This crucial 'Test for Leaks' step confirms your work is watertight.