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Seal and Install New Spout — Seal the Spout

Beginner3 hours

Part of project

How to Fix a Shower Diverter on a Tub Spout · Step 7 of 7

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In this video

Before installing the new spout, apply silicone caulk around the pipe where it exits the wall to create a primary waterproof seal. Next, wrap the exposed threads of the pipe nipple with new Teflon tape. Align the new spout and hand-thread it clockwise onto the pipe until it is snug against the wall and oriented correctly.

Goal: Install the new bathtub spout

  • Turn the new spout gently by hand to start the threads. Forcing it can cause cross-threading and damage the parts.

Used in this video

  • Caulk Gun (Caulk_Gun_Type: Manual)Applying silicone caulk
5.6K views685-10 minutes
Sam

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FAQs

Do I really need all the tools listed, like a torque wrench or patio furniture, for this project?

No, some listed tools are irrelevant for this specific project. You'll primarily need a utility knife or putty knife for caulk removal, a caulk gun for sealing, a rag/towel, and potentially an Allen wrench if your old spout has a set screw. Focus on plumbing-specific tools and materials.

What is the most important step to ensure a watertight seal for the new tub spout?

Thoroughly cleaning the pipe connection area is crucial. Remove all old caulk, debris, and corrosion before installing the new spout. After installation, apply a generous, continuous bead of silicone caulk around the base where the spout meets the wall to prevent water infiltration into the wall cavity.

How can I be sure to purchase the correct replacement tub spout?

First, determine if your existing spout is thread-on or slip-on by checking for threads inside the spout or a set screw underneath. Measure the pipe protrusion from the wall. Bringing your old spout or clear photos to the store will help ensure you get a new spout with the correct connection type and fit.

What should I do if water still drips from the tub spout when the shower is on after replacement?

If water still leaks, first re-examine your caulk seal for any gaps or imperfections. If the seal is good, ensure the new spout is fully engaged with the pipe connection; for threaded spouts, ensure plumber's tape was used and it's tightened properly. For slip-on spouts, verify the O-rings are seated correctly and the set screw is secure.