Do I need to turn off the water to replace a shower head?

No — this is one of the few plumbing jobs where you can leave the main water on, because you are working downstream of the shower valve. Just make sure the shower faucet itself is turned off. You are only unthreading the shower head from the fixed pipe stem (the shower arm) that comes out of the wall, and no water flows through it unless the shower is running. That is what makes this the most beginner-friendly plumbing task in the house.

What size is a standard shower head connection?

Almost every residential shower head in the US uses a 1/2-inch NPT (National Pipe Thread) connection, which is the standard the shower arm is threaded to. That universality means nearly any shower head you buy will thread onto your existing arm without an adapter. The exceptions are some handheld and European fixtures; if in doubt, the packaging states the thread size. You do not normally need to touch the shower arm itself — only the head that screws onto its end.

Why does my new shower head leak where it connects to the pipe?

You either skipped the thread tape or did not wrap enough. The threaded joint between the shower head and the arm seals on PTFE (plumber's) tape, not on metal-to-metal contact. Unthread the head, clean the old tape off the arm threads, and wrap three to four tight turns of fresh tape clockwise (the direction the head screws on) so it does not unravel as you tighten. Hand-tighten plus a gentle nudge with pliers is enough — overtightening cracks plastic fittings and does not fix a tape problem.

Should I replace the shower arm too?

Only if it is corroded, leaking at the wall, or you want a different reach or a rainfall drop. The shower arm is the curved or straight pipe that comes out of the wall, and replacing it means unscrewing it from the fitting inside the wall — a bigger job that risks disturbing the concealed connection. For a simple upgrade, leave the arm and just change the head. If the arm itself weeps at the wall escutcheon, that is when you replace it, wrapping fresh tape on the wall-side threads.

How do I remove a stuck or corroded shower head?

Grip the shower arm with one wrench or pliers to hold it steady, and turn the shower head counterclockwise with a second wrench — always brace the arm so you do not twist it and break the connection inside the wall. If it is seized by mineral scale, wrap a rag around the head to protect the finish, and apply penetrating oil or a white-vinegar-soaked cloth for 20 to 30 minutes to dissolve the scale before trying again. Steady pressure beats a sudden jerk.

How to Replace a Shower Head: A 10-Minute DIY Job

Written & researched by Priya Anand DIY & Tools Editor

Updated August 2026

Overhead view of a person's hands tightening a fitting under a kitchen sink with a wrench, in soft overcast light

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Replacing a shower head is the single easiest plumbing job in a house — about 10 minutes, $15 to $80 for the head, no shutoff, no permit and no plumber. You unthread the old head from the shower arm, clean the threads, wrap fresh plumber's tape, and hand-tighten the new head on. The only tools are pliers and a rag, and the one thing that goes wrong — a drip at the connection — is solved by wrapping the thread tape correctly. There is essentially no scenario where this needs a pro, unless the shower arm itself is broken inside the wall.

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How to Replace a Showerhead — The Home Depot

Tools and materials

The new shower head (1/2-inch NPT fits nearly every US shower arm).
PTFE thread tape — the one consumable that matters.
Adjustable pliers or two wrenches, and a rag to protect the finish and improve grip.
White vinegar or penetrating oil if the old head is scaled on. General plumbing tools cover the rest.

Wide view of a person's hands tightening a fitting under a kitchen sink with a wrench, in warm late-afternoon light

Step 1: Remove the old shower head

Make sure the shower is off. Wrap a rag around the connection nut to protect the finish. Grip the shower arm (the pipe from the wall) with one hand or a wrench to hold it steady, and turn the shower head counterclockwise with pliers. Bracing the arm is important — it stops you from twisting the concealed fitting inside the wall. If the head is stuck with mineral scale, soak the joint in vinegar or penetrating oil for 20 to 30 minutes and try again.

Step 2: Clean the threads

Peel off all the old thread tape and any hardened scale from the male threads on the end of the shower arm. The threads must be clean and dry for fresh tape to seal properly. A quick scrub with an old toothbrush and vinegar removes stubborn buildup.

Close-up detail of the material being worked in a diy plumbing project, in soft overcast light

Step 3: Wrap fresh thread tape

Hold the arm with the threads facing you and wrap three to four tight turns of PTFE tape clockwise — the same direction the head will thread on — so tightening the head pulls the tape snug rather than unraveling it. Press the tape into the thread grooves so it conforms. This is the entire secret to a drip-free connection; skip it and the joint will weep.

Step 4: Thread on the new head

Screw the new shower head onto the arm by hand, clockwise, until it is snug and you cannot easily turn it further. Then give it no more than a gentle quarter turn with rag-wrapped pliers if needed. Do not overtighten — most heads seal fully hand-tight, and cranking a plastic fitting cracks it. Aim the head to the position you want.

Low-angle view of a person's hands tightening a fitting under a kitchen sink with a wrench, in soft overcast light

Step 5: Test

Turn the shower on and run it for a minute. Watch the connection at the arm for any drip or spray, and check the spray pattern from the head. If a bead of water forms at the joint, shut off the shower, back the head off, and add another turn or two of tape. That is nearly always all it takes.

Common mistakes

Skipping the thread tape or wrapping it counterclockwise so it unravels — the cause of almost every leak.
Not bracing the shower arm, and twisting the hidden connection inside the wall loose.
Overtightening and cracking a plastic head or fitting.
Leaving old tape and scale on the threads, which prevents a clean seal.

When to call a plumber

There is almost never a reason to call a pro for a shower head. The only escalation is if the shower arm itself is corroded, leaking where it enters the wall, or snaps off inside the wall fitting — then you are into replacing the arm and possibly opening the wall to reach the drop-ear elbow, which some homeowners handle and others hand off. No permit is ever involved in changing a shower head. If your issue is weak flow rather than the head, check what psi home water pressure should be before blaming the fixture.

How to Replace a Shower Head