How To Change a Shower Arm? A Step-by-Step Guide
Want to replace that rusty or outdated shower arm? This guide provides straightforward instructions on how to change a shower arm safely and efficiently, saving you time and money on professional plumbing services.
Why Change Your Shower Arm?
The shower arm, the short pipe extending from the wall that connects to your showerhead, is often overlooked. However, it plays a critical role in your showering experience and can be a source of problems. Knowing how do you change a shower arm is a valuable skill for any homeowner.
Here are a few reasons why you might need to replace your shower arm:
- Corrosion: Over time, shower arms can rust and corrode, especially in areas with hard water.
- Leaks: Damaged threads or loose connections can lead to leaks, wasting water and potentially causing water damage.
- Upgrading: You might want to replace your existing arm with a longer or angled one to improve water flow and showerhead positioning.
- Aesthetics: A new shower arm can instantly update the look of your bathroom.
Tools and Materials You’ll Need
Before you begin, gather the necessary tools and materials:
- New Shower Arm: Choose a replacement arm that matches your showerhead’s thread size (typically ½-inch NPT).
- Adjustable Wrench or Pipe Wrench: For loosening and tightening the shower arm. Pipe wrenches can cause damage if not used carefully.
- Teflon Tape (Plumber’s Tape): To create a watertight seal.
- Old Rags or Towels: To protect the surrounding surfaces and catch any drips.
- Penetrating Oil (Optional): To loosen stubborn, corroded threads.
- Gloves: To protect your hands.
- Bucket (Optional): To catch water.
Step-by-Step Guide: Replacing Your Shower Arm
Here’s a detailed guide on how do you change a shower arm safely and effectively:
- Turn Off the Water Supply: Locate the shut-off valve for your shower. It’s typically located behind an access panel in the wall or near the water meter. Turn it off to prevent water from spraying everywhere.
- Prepare the Area: Place old rags or towels around the shower arm to protect the shower wall and floor from scratches. Have a bucket nearby to catch any residual water.
- Remove the Old Shower Arm:
- If your showerhead is still attached, remove it first.
- Apply penetrating oil to the shower arm threads where it enters the wall fitting. Let it sit for 10-15 minutes.
- Using the adjustable wrench or pipe wrench, grip the shower arm as close to the wall as possible.
- Turn the wrench counterclockwise to loosen the arm. It may require some force. Be careful not to damage the surrounding tiles.
- Once loose, unscrew the arm completely by hand.
- Clean the Threads: Remove any old Teflon tape or debris from the female threads inside the wall fitting. Use a small brush or pick if necessary.
- Apply Teflon Tape: Wrap the male threads of the new shower arm with Teflon tape, wrapping in a clockwise direction (when looking at the end of the threads) several times. This creates a watertight seal.
- Install the New Shower Arm: Carefully screw the new shower arm into the wall fitting, turning it clockwise. Tighten it by hand until it’s snug.
- Tighten with a Wrench: Use the adjustable wrench to tighten the shower arm further, but be careful not to overtighten. You want it to be secure but not so tight that you damage the threads. Usually about 1-2 additional turns past hand tight is sufficient. The arm should be pointing in the correct direction for your showerhead.
- Reattach the Showerhead: Attach your showerhead to the new shower arm, tightening it by hand and then with a wrench, if needed. Again, avoid overtightening.
- Turn on the Water Supply: Slowly turn the water supply back on and check for leaks around the shower arm and showerhead connections.
- Tighten if Necessary: If you see any leaks, turn off the water supply again and carefully tighten the connections slightly more. Repeat the process until the leaks stop.
Common Mistakes to Avoid
Knowing what not to do is just as important as knowing how do you change a shower arm successfully.
- Overtightening: Overtightening the shower arm or showerhead can damage the threads, leading to leaks.
- Not Using Teflon Tape: Skipping the Teflon tape can result in leaks.
- Using the Wrong Tools: Using the wrong tools can damage the shower arm or surrounding tiles. Pipe wrenches can easily mar finishes.
- Forgetting to Turn Off the Water: This is a recipe for a wet mess!
Troubleshooting
If you encounter any problems during the process, here are a few troubleshooting tips:
- Stubborn Shower Arm: If the old shower arm is stuck, apply more penetrating oil and let it sit for a longer period. You can also try using a pipe wrench with a cheater bar for added leverage, but be very careful not to damage the wall.
- Leaks: If you still have leaks after tightening the connections, try removing the shower arm and applying fresh Teflon tape. Make sure the threads are clean and dry before applying the tape. Check the showerhead washer or O-ring. It may be worn or missing.
- Cross-threading: This occurs if you don’t align the threads correctly when starting to screw in the new arm. Back it out and try again.
Frequently Asked Questions
Is it necessary to hire a plumber to change a shower arm?
No, in most cases, changing a shower arm is a relatively simple DIY project that you can easily handle yourself, provided you have the right tools and follow the steps carefully. However, if you’re uncomfortable working with plumbing or encounter any significant problems, it’s always best to call a qualified plumber.
What is the standard thread size for a shower arm?
The standard thread size for a shower arm in North America is ½-inch NPT (National Pipe Thread Tapered). This is a tapered thread that creates a watertight seal when tightened. Always make sure your replacement shower arm matches this size.
How do I remove a shower arm that is stuck due to corrosion?
Apply penetrating oil to the threads where the shower arm connects to the wall fitting. Let it sit for several hours or overnight. You can also try using a hair dryer or heat gun to gently heat the fitting, which can help loosen the corrosion. Be careful not to overheat the surrounding wall.
Can I reuse the old Teflon tape when installing a new shower arm?
No, you should always use fresh Teflon tape when installing a new shower arm. Old Teflon tape can become brittle and cracked, which can lead to leaks. Remove all traces of the old tape before applying new tape.
How much Teflon tape should I use on the shower arm threads?
Wrap the threads of the shower arm with 3-5 layers of Teflon tape, making sure to overlap each layer slightly. Wrap in the direction that tightens the connection. This will create a secure and watertight seal.
What if the shower arm breaks off inside the wall fitting?
This can be a tricky situation. You can try using a pipe extractor or internal pipe wrench to remove the broken piece. These tools are designed to grip the inside of the pipe and allow you to unscrew it. If you’re not comfortable using these tools, it’s best to call a plumber.
How tight should I tighten the shower arm?
Tighten the shower arm by hand until it’s snug, then use a wrench to tighten it another 1-2 turns. Avoid overtightening, as this can damage the threads and cause leaks. You want it to be secure but not forced.
What type of wrench is best for removing and installing a shower arm?
An adjustable wrench is generally the best choice for removing and installing a shower arm. It’s versatile and can be adjusted to fit the size of the shower arm. A pipe wrench can also be used, but it’s more likely to damage the finish on the shower arm.
How do I know if I’m cross-threading the shower arm?
If you’re cross-threading the shower arm, you’ll feel resistance and the arm won’t screw in smoothly. Stop immediately and back the arm out. Inspect the threads for damage and try again, making sure the threads are aligned correctly.
What should I do if the wall fitting is damaged?
If the wall fitting is damaged, you’ll need to repair or replace it. This is a more complex plumbing job that may require cutting into the wall. It’s best to call a plumber for this type of repair.
Is it okay to use plumber’s putty instead of Teflon tape?
No, plumber’s putty is not a substitute for Teflon tape on threaded connections like a shower arm. Plumber’s putty is designed to seal around drain fittings, not threaded pipes. Use Teflon tape for a secure and watertight seal.
How often should I replace my shower arm?
There’s no set timeframe for replacing a shower arm. However, you should consider replacing it if it shows signs of corrosion, leaks, or damage. Also, replacing it can be a quick aesthetic upgrade as well.