A shower diverter is a small but integral part of your bathroom plumbing system. It controls the flow of water between your bathtub faucet and showerhead, allowing you to switch between a bath and shower with ease. 

When it fails, it can disrupt your daily routine and‌ lead to water waste. This guide will walk you through the process of identifying, troubleshooting, and repairing common shower diverter issues, helping you restore your shower’s functionality and avoid costly professional repairs.

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Understanding Shower Diverters: Types and Functions

Before diving into repairs, you should know what a shower diverter is and the different types you might have in your bathroom.

What Is a Shower Diverter?

A shower diverter is a valve that controls the water flow in your shower system. It redirects water from the tub spout to the showerhead when you turn or flip it. This simple mechanism allows you to switch between taking a bath and a shower without the need for separate plumbing fixtures.

Common Types of Shower Diverters

There are three main types of shower diverters you might find in your bathroom:

• Three-valve diverter: Found in systems with separate hot and cold water knobs, plus a third that serves as the diverter.
• Tub spout diverter: This is common in bathtub/shower combos and older homes. A lever on the tub spout controls water flow.
• Two-valve diverter: This setup has one knob for water temperature and another that acts as the shower diverter.

Knowing the type of shower diverter you have will help you troubleshoot issues and make repairs. Identify your diverter type before attempting to fix it.

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Signs Your Shower Diverter Needs Repair

Recognizing the signs of a faulty shower diverter can help you address issues before they become more serious.

Difficulty in Operation

If the diverter is hard to pull up or doesn’t stay in position, it could mean there’s an issue with the internal components. This could be due to a worn-out washer or a damaged diverter stem, both of which are repairable issues.

Leaks and Drips

A leaky diverter handle or faucet is a clear sign that you need a repair or replacement. Worn-out washers, cracked components, or a loose diverter system can all cause leaks. Addressing these issues right away can prevent water damage and reduce water waste.

Water Flow Issues

If you notice reduced water pressure in your showerhead or water continuing to flow from the tub spout when the diverter is engaged, it’s likely time for a repair. These issues often mean there’s a problem with the diverter mechanism or mineral buildup within the system.

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Tools Needed To Repair a Shower Diverter

Before starting your repair, gather the below tools. You can fix most issues within your diverter with these basic tools and plumbing items.

• An adjustable wrench to loosen and tighten nuts and fittings within the diverter system.
• A screwdriver to remove screws and dig gunk out of a bathtub spout that may be blocking the diverter mechanism.
• Pliers to grip stubborn nuts or remove small components within the diverter system.
• Plumber’s tape to create a watertight seal around threaded connections within the shower system.
• Rags to plug up the drain hole in your tub or shower to prevent the loss of small components like nuts or bolts while making repairs.

You may also need replacement parts, such as a new washer or a repair kit. Bring any old pieces to the plumbing repair or hardware store to purchase an exact replacement.

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Step-by-Step Shower Diverter Repair

Follow these steps to repair your shower diverter. With proper preparation and careful execution, most homeowners can fix common diverter issues themselves without needing a professional plumber.

1. Turn Off the Water Supply

Locate the shutoff valves for your shower before starting work on the repair. These valves are usually situated beneath the faucet handle or behind an access panel faceplate. Turn the valves clockwise to stop the water from flowing into the shower.

2. Remove the Shower Spout

You can unscrew most tub spouts by turning them counterclockwise. If your spout isn’t moving or feels stuck, look underneath the spout for a set screw. Use an adjustable wrench or screwdriver to remove the screw. A little water may leak out when you loosen the set screw or remove the spout.

3. Inspect the Diverter

Once you remove the tub spout, you can find the diverter mechanism inside. Look for signs of wear and tear, cracks in the housing, or a lot of mineral buildup. Pull up the diverter stem to see if it moves up and down smoothly. If it doesn’t, you may need to replace it.

4. Replace or Clean the Diverter

How you fix your shower diverter will depend on the issue. Here are some common problems and how to resolve them.

• Broken diverter stem: If the diverter stem is bent, damaged, or otherwise broken, you’ll need to replace it. How you do this depends on your faucet model. However, many stems can be gently pried away from the bracket inside the tub faucet. If you aren’t sure how to do it, consult the manufacturer’s website for instructions. Once you’ve removed the broken stem, you can bring it to The Home Depot or another home improvement store to find an exact replacement.
• Mineral buildup: If you live in an area with hard water, mineral buildup is a common cause of broken shower diverters. Use a flat-head screwdriver to carefully scrape mineral buildup from the diverter housing, or take the diverter mechanism apart and soak the pieces in white vinegar for a few hours. Scrub them clean with warm, soapy water and a soft-bristled brush before reassembling and reinstalling the diverter.
• Worn-out washer: This is the most common type of diverter issue. Washers usually only last for about five years before they need replacing. Use pliers to remove the old washer. If the washer looks dirty but is otherwise in good condition, you may be able to wash it and put it back into the diverter. If there are cracks or other signs of wear and tear, it’s best to replace it. Bring the old washer with you to your local home improvement store so you can get an exact replacement. When you replace the washer, add a little grease to keep it moving freely within the diverter housing.

5. Reinstall the Shower Spout

Once you’ve repaired or replaced broken parts within the diverter, you can reinstall your shower spout. Start by wrapping a few layers of plumber’s tape around the threads of the spout where it meets the wall. Screw the tub faucet back onto the threads, then replace the set screw (if you removed one). Be careful not to overtighten the spout. You want it flush with the tile and pointing straight into the tub.

Turn the water supply back on and check for leaks around the tub spout or diverter. Turn the water on and test the diverter, moving it up and down a few times to check that it works correctly. If you are still experiencing issues, you may need to replace the entire tub spout or contact a handyperson for more suggestions.

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Troubleshooting Common Shower Diverter Problems

Even after repair, you might encounter some issues. Here’s how to address them.

Partial Water Diversion

When water still flows from the tub spout while showering, check for mineral buildup in the diverter or showerhead. Clean both thoroughly and reassemble to get it working again.

Persistent Leaks After Repair

If leaks continue after your repair, double-check all connections and make sure they’re tight. You may need to replace the entire tub spout or diverter mechanism if leaks keep happening.

Stuck or Unresponsive Diverter

If the diverter won’t move or stay in position, you might need to lubricate or replace it. Try applying plumbing grease to the mechanism. If this doesn’t work, you may need to replace the entire diverter assembly for optimal performance.

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Preventive Maintenance for Shower Diverters

Regular maintenance can help extend the life of your shower diverter and prevent future issues. To keep your shower system in good condition, clean your showerhead and tub spout regularly to prevent mineral buildup. Use a mixture of equal parts white vinegar and water to soak these components monthly. Gently scrub away any visible deposits with a soft brush for a clean finish.

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When To Call a Professional Plumber

While many shower diverter repairs are do-it-yourself (DIY)-friendly, some situations call for professional help. Here’s when we recommend hiring a plumber.

Complex Repairs Beyond DIY

If you’ve attempted repairs and the problem persists, or if you encounter issues within the wall behind the shower, it’s time to call a plumber. They have the tools and expertise to handle more complex plumbing issues safely.

Signs of Larger Plumbing Issues

If you notice sudden changes in water pressure throughout your home, hear unusual noises in your pipes, or see water stains on walls or ceilings, these could indicate larger plumbing problems that a plumber should inspect.

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Our Conclusion

Repairing a shower diverter is a manageable DIY project for many homeowners. By following this guide, you can diagnose common issues, perform basic repairs, and maintain your shower diverter. Regular maintenance and prompt attention to small problems can prevent more significant issues down the line.

Remember, if you’re ever unsure about a repair or face a problem beyond your skill level, don’t hesitate to hire a pro. They get your shower system repaired correctly and safely, giving you peace of mind and a fully functional shower.

For more bathroom repair articles, read our article on repairing a bathtub faucet.

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FAQ About Shower Diverter Repair

How do you fix a shower diverter that won’t stay up?

A shower diverter that won’t stay up is most likely caused by an issue with the rubber washer inside the mechanism. Remove the tub spout and gently pry out the old washer with pliers. Replace the washer and add a little grease to help it slide up and down freely.

What is the problem with the shower diverter valve?

The most common problems with a shower diverter valve are due to wear and tear, mineral buildup, or cracks in the diverter housing. You can unscrew the spout and inspect the diverter, removing any mineral buildup and replacing any broken parts. This will fix any issues with the valve in most cases.

Do you need to turn off the water to replace a shower diverter?

Yes, you need to turn the water off to replace a shower diverter. Locate the shut-off valve, usually under the faucet handles or behind an access faceplate, and turn the valves clockwise. Turning the water off will prevent unexpected water flow and reduce the risk of water damage.

How do you replace a plastic shower diverter?

To replace a plastic shower diverter, gently pry out the old one with pliers. Then, take the old one to your local home improvement store, purchase an exact replacement, and reassemble the mechanism.

Is it hard to replace a shower diverter?

It’s not hard to replace a shower diverter. Most homeowners with a little plumbing know-how can take on this home improvement task. However, if you’re unsure or uncomfortable about doing the work yourself, it’s best to contact a professional plumber.

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