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Shower Diverter Valve Repair Guide

mediumHome Repair1 hr

This guide provides step-by-step instructions for homeowners looking to fix a leaking or malfunctioning shower diverter valve. You will learn how to safely remove the old diverter gate and install a replacement kit using basic hand tools. This quick repair ensures your water flows correctly from the tub to the shower head without wasting water.

Safety Warnings

  • Ensure the water supply is completely shut off before beginning to prevent flooding.
  • If you are unsure of your valve type or encounter severe corrosion, consult a professional plumber.

Tools Needed

Needle-nose pliers — standard
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Phillips #2 — Cross-head driver for tightening and loosening screws
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Flat-head screwdriver — standard
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Materials

Diverter repair kit — model-specific (e.g., Moen)(1 kit)
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Towel — absorbent(1)
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Steps

1
Place a towel over the bathtub drain to prevent small parts, such as the diverter gate or screws, from falling into the plumbing.
2
Identify the diverter valve. In tub-shower combos, this is typically the pull arm located on the bathtub faucet that redirects water flow to the shower head.
3
Remove the old diverter gate. Use needle-nose pliers or a flat-head screwdriver to pull the two legs of the gate apart or pry it away from the lift rod.
Diverter gate Lift rod Spout body Pry upward Use pliers to pry the diverter gate away from the lift rod and remove.
4
Inspect the gate for a seal. If the rubber seal is missing, degraded, or fallen out, it will prevent the valve from diverting water to the shower head.
5
Prepare the new gate by inserting the rubber seal from the repair kit. Ensure the flat side of the seal is facing out from the gate.
Diverter gate Rubber seal Flat side out Insert seal Insert the rubber seal into the gate with the flat side facing outward.
6
Insert the new gate into the tub spout, ensuring it slides underneath the two metal fins inside the spout.
Metal fins Diverter gate Tub spout slide under the fins Insert the new gate underneath the metal fins inside the spout.
7
Reattach the lift rod by inserting it from the top and snapping it into the notch of the gate. Use your fingers or needle-nose pliers to help snap the plastic pieces into place.
8
Turn on the water supply and test the functionality by pulling up on the lift rod to verify that water is successfully diverted from the tub spout to the shower head.

Pro Tips

  • Take the original diverter gate to the hardware store to ensure you purchase a repair kit that matches the specific size and shape of your valve.

When to Call a Professional

If water continues to leak from the tub spout or pressure remains low after replacing the diverter, contact a licensed plumber.

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