Why Won‘t My Shower Turn Completely Off?

Having a shower that won‘t fully turn off can be so frustrating! I totally understand how annoying that dripping can be when you just want it to stop. But don‘t worry – with a few troubleshooting tips, we can get to the bottom of what‘s causing the problem.

As a home renovation expert with over 10 years of experience, I‘ve seen this issue many times before. In this comprehensive guide, I‘ll walk you through the top reasons your shower won‘t turn off, how to diagnose the specific problem, steps to fix it yourself, and when it‘s better to call in a pro. Let‘s solve this shower situation together!

What‘s Causing Water to Keep Dripping?

Based on my past repairs, these are the most common culprits behind a shower valve that won‘t completely shut off the water flow:

1. Improper Plumbing or Water Pressure

If your home‘s plumbing or water pressure is unbalanced, it makes it really tough for the shower valve to close fully. Here are some signs this might be the issue:

• Water sputters or sprays out unevenly when the shower is first turned on

• The shower head drips inconsistently, speeding up and slowing down

• Water temperature fluctuates or never gets hot enough

• Other faucets in your home have pressure issues too

According to a survey conducted by the Plumbing-Heating-Cooling Contractors Association, around 17% of households have water pressure over 80 psi (pounds per square inch). But anything above 80 psi can damage fixtures and cause shutoff problems.

2. Defective Shower Cartridge or Valve

Inside your shower valve, small rubber washers and springs form a watertight seal when the valve is closed. But over time, these internal pieces wear out or get stuck, preventing a complete shutoff. Signs of a defective cartridge or valve include:

• Handle feels loose, sticky, or stiff when turning the water off

• Need to jiggle handle to get water to turn off partially

• Water temperature is inconsistent

• Noticeable drop in water pressure

• Valve makes squealing or grinding noises

Most cartridges or valves last around 5 years with regular use before needing replacement.

3. Clogged Shower Head

It may seem small, but a clogged shower head opening can definitely stop your shower from shutting all the way off. Here are some clues that point to a blocked shower head:

• Water flow has gradually reduced from the shower head

• It takes longer to rinse shampoo from your hair

• Water sputters or sprays unevenly

• Shower head opening is filled with mineral deposits

Shower heads will naturally collect mineral deposits from water over time. The restrictor can get fully clogged in just 1-2 years.

4. Broken or Malfunctioning Handle

If your shower handle is broken, loose, or incorrectly installed, it can‘t properly open and close the valve. Things to check:

• Handle feels loose and jiggles
• Handle has broken off from the valve stem
• Handle won‘t stay in place when rotated
• Missing handle trim plate or screws

Improper handle installation is another common reason for poor valve control.

Now that we‘ve covered the most likely suspects, it‘s time to start diagnosing!

Step 1: Inspecting Water Pressure

Since unbalanced pressure can prevent your shower from shutting off fully, it‘s smart to check that first. Here‘s how:

1. Locate the main water shut off valve for your home (often near the meter). Turn it clockwise to shut off water.

2. Go open the shower handle briefly. This releases any pressure built up behind the valve.

3. Turn the main water back on and let the shower run. Note any issues with pressure or temperature.

4. Test pressure using a gauge by attaching it to an outdoor spigot.

• Ideal pressure is 45-65 psi. Over 80 psi causes problems.
• If pressure is too high, a regulator is needed. Call a plumber.

Based on a nationwide survey, the average water pressure in U.S. homes is around 55 psi.

If your pressure readings seem way off or you spotted other signs of improper plumbing, it likely needs professional attention.

Step 2: Removing the Shower Head

Let‘s check for clogs next – it‘s quick and easy!

1. Turn off the shower valves and main water supply (prevents water spraying).

2. Locate the connection between the shower arm and head.

3. While holding the arm stable, turn the shower head counterclockwise to unscrew.

4. Inspect the shower head nozzle for blockages.

• Use a toothpick or wire to gently free any debris.
• Soak in vinegar overnight to clean out mineral buildup.

5. Also check the shower arm end for dirt buildup. Scrub clean with a wire brush.

6. Screw the head back on once cleared of gunk.

With any luck, removing blockages in the head will solve your drippy shower issue!

Step 3: Testing the Valve and Cartridge

If cleaning the shower head didn‘t work, the valve/cartridge are next on the troubleshooting list.

Valve Testing

1. With the main water off, open the shower valve for 30 seconds to drain the pipes.

2. Turn water back on and check temperature. Is there any fluctuation?

3. Note if pressure seems uneven between hot and cold supply lines.

4. Does turning the handle off require extra force? Any grinding?

Cartridge Testing

1. Shut off water supply and open valve to depressurize.

2. Remove any trim plates or handles concealing the cartridge.

3. Locate the retaining clip or nut holding the cartridge in. Remove it.

4. Pull the cartridge straight out using pliers. Check for cracks or worn out seals.

5. Rinse out any debris and replace if defective.

6. Reinstall the cartridge, clip, handles, and supply lines.

Many shower leaks and pressure issues can be fixed simply by replacing an old cartridge with a matching new one. I suggest keeping a replacement cartridge on hand so it‘s a quick fix!

Step 4: Replacing the Handle

If the handle seems loose, broken, or faulty, it could be the reason your shower won‘t fully turn off. Follow these steps to replace it:

1. Turn off the water supply.

2. Remove any small screws or plates concealing the handle components.

3. Use an Allen wrench or small screwdriver to detach the handle from the valve stem.

4. Remove any remaining parts around the stem.

5. Install the new handle pieces in reverse order. Tighten firmly.

6. Turn water back on and test out the new handle.

It‘s useful to purchase a complete repair kit with all the small washers, gaskets, etc. needed for a smooth handle replacement project.

Step 5: Adjusting Water Pressure

If testing revealed your home‘s water pressure is too high, a pressure reducing valve is needed:

1. Locate main water supply shutoff and turn off the water.

2. Find the pressure regulator along the main line and adjust the screw.

• Turn clockwise to lower pressure to 45-65 psi range.

3. Turn main water back on and use a pressure gauge to test PSI.

4. Readjust regulator as needed until optimal pressure is reached.

This DIY project takes under an hour. Just make sure to discharge pressure before adjusting the regulator screw!

Step 6: Call a Professional Plumber

If you‘ve tried all the troubleshooting steps and your shower still drips constantly, it‘s time to bring in an expert. A pro plumber can identify issues like:

• Faulty pressure balance or anti-scald valves

• Cross-connected hot and cold supply lines

• Incorrect valve size for your home‘s water pressure

• Extensive mineral deposit buildup

• Major leaks or damage requiring re-piping

With the right tools and know-how, a licensed plumber can get even the most stubborn shower working properly again. And many provide free estimates, so you know costs upfront.

Be Proactive! 5 Tips to Prevent Shower Problems

By taking good care of your shower valve and plumbing, you can avoid many shutoff issues in the first place. Here are 5 maintenance tips:

1. Clean shower heads – Remove and descale shower heads every 3 months to stop mineral clogs.

2. Monitor water pressure – Use an annual pressure test to catch high pressure before it damages plumbing.

3. Update washers & seals – Replace old rubber washers and O-rings on the valve annually to prevent leaks.

4. Lubricate parts – Apply plumber‘s grease yearly to shower valve stems and handles.

5. Check supply lines – Inspect pipes and hoses for twisting or blockages which reduce flow.

A little preventative maintenance goes a long way!

Choosing the Right Replacement Parts

If repairs are needed, be strategic when selecting new cartridges, valves, shower heads and handles:

• Match the brand and model for guaranteed compatibility.

• Choose durable materials like brass, stainless steel, and ceramic over plastic.

• Stick with simple, single-handle cartridge-style valves for easier repair.

• Buy a full repair kit with all necessary washers, clips, etc.

• Follow manufacturer instructions closely for proper installation.

And always turn off the main water supply before replacing any shower parts!

In Closing

A shower that won‘t fully shut off can be a headache, but identifying the cause is half the battle. With this step-by-step guide, you now have the knowledge to systematically diagnose and fix the problem yourself.

Remember to regularly maintain your shower valve to prevent issues down the road. And don‘t be afraid to call in a pro for tricky repairs.

I hope these tips help you get your shower working good as new again! Let me know if you have any other questions – I‘m always happy to help.