Replacing a shower head is the single most satisfying 15-minute upgrade in a bathroom. No plumber, no wall opening, and the difference between a scaled-up 20-year-old head and a new rain or handheld head is something you feel every morning. This guide covers removing the old head (including a stuck one), taping the threads so it never drips, installing fixed, handheld and rain heads, and what to do when the connection leaks afterwards.
Key takeaways
- Every shower head in North America uses the same 1/2" NPT thread on the shower arm. Any head fits any arm.
- You need a wrench, a rag, PTFE (Teflon) tape and 15 minutes. No water shut-off required.
- Wrap the tape clockwise 3–4 turns, looking at the end of the arm. Wrapped the wrong way it unravels as you screw the head on.
- A drip from the head after you shut off is a valve cartridge problem, not the head. A leak at the arm is a thread or washer problem.
- New shower heads sold in Canada flow up to 1.8 gpm (6.8 L/min). A rain head can still feel strong if it is engineered for the low flow.
Tools and materials
- Adjustable wrench or slip-joint pliers
- Old rag or a piece of leather to protect the finish
- PTFE tape (the white or pink plumber's tape)
- White vinegar and an old toothbrush
- Penetrating oil, only if the old head is stuck
- Your new shower head, plus a rubber washer (usually included)
Step 1: Remove the old shower head
- Hold the shower arm (the pipe coming out of the wall) firmly with one hand or with pliers wrapped in a rag. This is critical: if the arm turns instead of the head, you can loosen or crack the fitting inside the wall.
- Turn the shower head counter-clockwise. Many come off by hand; otherwise use the wrench on the flats of the connector nut, with a rag between the jaws and the finish.
- Once loose, unscrew it by hand and set it aside.
- Clean the threads on the arm: peel off old tape and scrape any pipe dope with a fingernail or plastic scraper. Scrub with vinegar and a toothbrush if there is scale.
If the head is stuck
- Wrap the connection in a rag soaked in white vinegar, tie a plastic bag around it and leave it for 1–2 hours. Scale is what usually locks it.
- Spray penetrating oil on the joint, wait 15 minutes, then try again with two wrenches: one holding the arm, one turning the head.
- Do not use excessive force. If the arm starts to turn, stop. It is threaded into a drop-ear elbow in the wall; snapping it means opening the wall.
- As a last resort, replace the shower arm too ($10–$30). Unscrew the arm from the wall counter-clockwise and install a new one with tape on both ends.
Step 2: Tape the threads
This is the step that decides whether the new head drips at the connection.
- Face the end of the shower arm. Hold the tape against the threads and wrap clockwise (the direction the head will screw on), so the tape tightens rather than unwinds as you thread it.
- Apply 3 to 4 full turns, pulling the tape snug so it conforms to the threads. Leave the first thread bare so no tape ends up inside the head.
- Tear the tape and press the end down.
Step 3: Install the new head
Fixed shower head
- Check that the rubber washer is seated inside the connector nut.
- Thread the head onto the arm by hand until snug.
- Give it a further quarter turn with the wrench, protecting the finish with a rag. Do not crank it; over-tightening crushes the washer and cracks plastic connectors.
- Adjust the ball joint to aim the spray.
Handheld shower head
- Thread the holder/bracket onto the arm exactly as above.
- Attach the hose to the bracket outlet, then the handheld to the hose. Both hose ends have washers; hand-tight is enough.
- If you want both a fixed head and a handheld, install a diverter bracket on the arm: it has one inlet and two outlets with a small lever to switch.
Rain shower head
- A wide rain head on a standard short arm will sit close to the wall and hit you in the back of the head. Most people install an extension arm (10"–16", angled or S-shaped) to bring it out and up.
- Unscrew the old arm from the wall, tape both ends of the new arm, and thread it into the wall elbow by hand plus a quarter turn, aiming the outlet down.
- Thread the rain head on. Support the weight of large heads with one hand while tightening.
- Ceiling-mount rain heads require a pipe in the ceiling and are a plumber job.
Step 4: Test for leaks
- Turn the shower on full. Watch the connection at the arm for 30 seconds.
- A few drops at first are normal as the threads seat. A steady drip means the tape was wrapped the wrong way or the washer is missing. Remove, re-tape and reinstall.
- Check the spray pattern. Some new heads spit for the first minute as air leaves the line.
Fixing a shower head that leaks or drips
| Symptom | Cause | Fix |
|---|---|---|
| Drips from the face of the head for hours after the shower is off | Shower valve cartridge is not sealing | Replace the valve cartridge (guide here). The head is not the problem. |
| Drips for 30–60 seconds after shut-off, then stops | Normal drainage of water held in the head and arm | Nothing needed. Large rain heads hold more water. |
| Water sprays from the connection at the arm while running | Bad tape job, missing washer or cracked connector | Remove, re-tape clockwise, check washer, reinstall |
| Water leaks from the wall behind the arm | Arm loose in the drop-ear elbow | Remove the arm, re-tape, reinstall. If the elbow itself leaks, call a plumber. |
| Water leaks between the head and its swivel ball | Worn O-ring in the swivel | Replace the O-ring, or the head |
| Weak or uneven spray, some nozzles blocked | Limescale | Soak in vinegar (guide here) |
Understanding flow rate in Canada
Since 2010, shower heads sold in Canada are limited to 9.5 L/min (2.5 gpm) federally, and Ontario's building code requires 7.6 L/min (2.0 gpm) for new construction. Most heads on the market today are rated at 1.8 gpm or less, and WaterSense-labelled heads are 2.0 gpm or lower with a spray-force test.
What that means for you:
- A low-flow head can still feel strong. Good ones use air induction or larger nozzles to make the spray feel fuller. Look at the nozzle design, not just the number.
- A 12" rain head at 1.8 gpm covers a wide area with a gentle rain. If you want pressure, pair it with a hand shower on a diverter.
- Removing the flow restrictor is illegal in some jurisdictions and voids the warranty. It also usually makes the spray uneven, because the head was engineered around the restrictor.
- Low water pressure in the house (under 40 psi) will make any head feel weak. A pressure test at an outdoor hose bib tells you where you stand.
Thinking bigger? Complete shower sets
If the valve is also old or you want a rain head, hand shower and slide bar together, a complete shower system replaces everything at once. These sets include the valve trim, arm, heads and hoses in a matching finish.
Upgrade the whole shower
Complete shower sets and systems from Kodaen, Lauretta and NLB, in chrome, matte black, brushed nickel and gold. Delivered across Ontario, free on orders over $600.
Frequently asked questions
Do I need to turn off the water to change a shower head?
No. The shower head is downstream of the valve. Just make sure the shower is turned off at the handle.
Will any shower head fit my shower?
Yes. All shower heads and arms in North America use a 1/2" NPT thread. Only ceiling-mount and some European heads differ, and adapters exist for those.
Why does my new shower head leak at the connection?
Almost always the PTFE tape was wrapped counter-clockwise and unravelled as the head was threaded on, or the rubber washer is missing. Remove, re-tape clockwise with 3–4 turns, check the washer and reinstall hand-tight plus a quarter turn.
Why does my shower head drip when the water is off?
If it stops within a minute, it is just water draining from the head. If it drips for hours, the shower valve cartridge is worn and needs replacing; the head itself is fine.
Can I install a rain shower head on a regular arm?
Yes, but it will sit close to the wall. An angled or S-shaped extension arm brings the head out and up so the rain falls over your whole body.
Should I use pipe dope or tape?
Tape is easier, cleaner and plenty for a shower head. Pipe dope is for permanent joints; it makes the head harder to remove later.
