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Assemble the P-Trap — Make Final Connections

Beginner

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How to Replace a Bathtub Waste and Overflow Drain Assembly · Step 8 of 9

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Now that the offset fitting has corrected the alignment, you can assemble the rest of the P-trap. Attach the tailpiece extension to the bottom of the sink drain. Then, connect the J-bend (the U-shaped portion of the trap) between the tailpiece extension and the offset fitting. Ensure all washers are properly seated before hand-tightening the slip nuts to create secure, leak-proof seals.

Goal: Complete the P-trap installation by connecting all components

  • Hand-tighten the nuts first. If there are any drips after testing, use channel-lock pliers to give them a slight quarter-turn, but be careful not to overtighten and crack the plastic.

Used in this video

  • Channel-Lock Pliers (brand: Unknown, Tool Type: Pliers, Pliers_Type: Channel-Lock) · optionalFor final tightening of slip nuts if hand-tightening is not sufficient to prevent leaks.
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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.

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in the wall and then set up your p-trap as normal. I can guarantee you this is a thousand times more effective than that slinky garbage. That's it.

Auto-generated transcript. May contain errors.