Install New Shower Arm and Flange — Prepare and Wrap the New Shower Arm

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How to Replace a Shower Arm · Step 5 of 7

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Before installing the new shower arm, wrap Teflon tape (plumber's tape) clockwise around the threads that will screw into the wall. This creates a watertight seal. Next, slide the new flange onto the shower arm. Then, carefully screw the shower arm into the wall fitting by hand, turning it clockwise until it is tight and positioned correctly, usually pointing downwards. Slide the flange flush against the wall.

Goal: Shower Arm Installation

Used in this video

New Shower Arm (brand: Delta) — Replacing the old shower arm.
New Flange (brand: Delta) — Covering the hole in the wall.

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steven lavimoniere

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FAQs

How long does it typically take to replace a shower arm, and what's the estimated cost for materials?

For a beginner, this project usually takes about 30-60 minutes, assuming no major complications like a stuck old arm. The cost primarily depends on your chosen new shower arm and shower head, ranging from $20-$100+ for materials, making it a very cost-effective DIY upgrade.

What are the most crucial tools and materials I need to ensure a successful, leak-free installation?

Beyond your new shower arm and head, essential tools include an adjustable wrench for tightening and a wire brush for cleaning old threads. Plumber's tape (Teflon tape) is critical for sealing the new arm's threads; don't skip it. Have rags ready for any drips.

Are there any important safety precautions I should take before starting, especially since it involves plumbing?

Absolutely. Always turn off the main water supply to your house or at least to the bathroom before starting to prevent accidental flooding. Also, protect your shower/tub surface from dropped tools or materials using a cloth or old towel.

My old shower arm is really stuck. What's the best way to remove it without damaging the wall fitting?

If your old shower arm is stuck, try applying some penetrating oil around the threads and letting it sit for a few minutes before trying again with an adjustable wrench. Turn counter-clockwise with steady, firm pressure. Be careful not to apply excessive force that could twist the pipe inside the wall, which would require professional help.

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Before you put your new shower arm into the wall, you should put a layer of plumbers tape or Teflon tape around the end that you're going to screw into the wall. Take the new flange, put it on to the end of the shower arm before you screw it into the wall. This way your flange is already close to the wall and you have less chance of scratching the finish on your shower arm when you're ready to move it into place. You also want to make sure that when you're screwing it in, you end up in a place where it's nice and secure in the wall, but also that it's straight facing downwards. This took a little bit of finagling, then gently push the flange up against the wall. In order to get the shower head onto the arm,

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