Kohler Tub Faucet With Diverter: Step-by-Step Repair and Replacement Guide

By Caleb Morgan

Updated November 2026

A kohler tub faucet with diverter sends water either to the spout or up to a showerhead, and when it works properly you never think about it. When it doesn’t, you usually notice a drip from the spout while the shower runs, water that won’t switch over, or a diverter that feels stuck. This guide explains how the system works, how to figure out which Kohler valve you have, and how to diagnose and fix the most common problems yourself.

How a Kohler Tub Faucet Diverter Works

Most Kohler tub-and-shower setups use one of three diverter designs. The first is a pull-up diverter, a knob on the spout you lift to send water to the shower. The second is a push-button diverter, which you press in to switch. The third is a handle diverter, where a lever or the handle itself moves a small internal gate. In every case, the diverter is a valve that directs flow between two outlets. Inside the faucet body, a stem or gate slides across an opening, and a seal keeps water from leaking past it when it is in the closed position.

Shopping for one? See our guide: 6 Best Repair Tub Faucet Diverter Kits Compared (2026).

Because the diverter sits in the water path, wear in its seals or debris in its passages shows up as a specific symptom. Knowing which symptom you have narrows the repair considerably.

Identify Your Kohler Diverter Type and Valve

Before buying parts, confirm exactly what you have. Kohler has produced many valve families over the years, and a diverter from one line will not necessarily fit another. Look for the model number, which is usually printed on the spout body, on the valve body behind the trim, or on the installation sheet. If you still have the original packaging or the manual, that is the fastest source.

1. Remove the handle and check whether the trim is a single-handle or two-handle design.
2. Note whether the diverter is on the spout, on the handle, or built into the valve escutcheon.
3. Photograph the valve before you disassemble anything, so you can reassemble it in the right order.
4. Search Kohler’s published parts diagrams for your model number to see the exact cartridge, stem or gate names.

Kohler’s own documentation lists replacement parts by model, so matching against the diagram is more reliable than matching by appearance.

Tools and Supplies You Will Need

Most diverter repairs take between 30 minutes and an hour for a first-timer. Gather these before you start:

• Adjustable wrench or basin wrench
• Phillips and flat-blade screwdrivers
• Allen wrench set (many Kohler handles use a set screw)
• Plastic handle puller or a set of thin nylon pry tools
• Soft cloth and painter’s tape to protect the finish
• White vinegar, a soft brush and a small container for soaking parts
• Replacement O-rings, seals or the diverter component for your model
• Plumber’s silicone or Teflon-based lubricant (use only what the manufacturer specifies)

Step-by-Step: Fixing a Leaking or Stuck Diverter

Step 1: Shut Off the Water

Close the hot and cold supply valves under the tub or behind an access panel. Then open the tub faucet to relieve remaining pressure. If the valves do not fully close, you may need to shut off the main supply for the bathroom or the whole house.

Step 2: Remove the Handle and Trim

Pry off the decorative cap or unscrew the set screw, then lift off the handle. Some Kohler handles hide the screw under a small cap. Remove the escutcheon plate next, taking care not to scratch the finish. Lay all the small parts out on a towel in the order you removed them.

Step 3: Remove the Diverter Assembly

For a pull-up diverter, unscrew the spout body or unthread the diverter cap, then slide out the stem and gate. For a push-button or handle diverter, the component usually comes out after the trim is off and a retaining nut or clip is removed. Work slowly; old plastic can crack.

Step 4: Inspect and Clean

Look for three things: worn O-rings that are flattened, cracked or hardened; mineral scale on the gate or seat; and grit caught in the passages. Soak small parts in white vinegar for 20 to 30 minutes to dissolve scale, then rinse and dry them. Do not soak parts that have rubber seals longer than necessary, because prolonged acid exposure can degrade some elastomers.

Step 5: Replace Worn Components

If the seals are damaged, replace the full seal set rather than a single O-ring, since the others are likely near the end of their life too. If the gate or stem itself is scored, replace that component. Match part numbers against the Kohler diagram for your model. Lubricate new O-rings lightly with the lubricant specified for your valve before installing them.

Step 6: Reassemble and Test

Reinstall the components in the reverse order you removed them. Tighten retaining nuts snugly but do not overtighten, since that can crack plastic bodies. Restore the water, check for leaks at every joint, then test both diverter positions. Run the tub spout until the water is hot, switch to the shower, and confirm that the flow moves cleanly without dripping from the spout.

Diagnosing Common Symptoms

If you have a steady drip that keeps going after a new diverter seal, the problem may be in the main valve cartridge rather than the diverter. The steps for that are covered in our guide to Repair Tub Faucet Drip: A Step-by-Step Guide to Stop Leaks (2026), which walks through the same kind of isolation.

Common Mistakes to Avoid

• Buying parts before identifying the model. Kohler diverters vary by valve family, and a near-match often will not seal correctly.
• Over-tightening plastic components. Cracked diverter bodies are one of the most frequent repair-induced failures.
• Skipping the photos. Reassembly order matters for stems, springs and small washers.
• Using the wrong lubricant. Petroleum-based products can swell rubber seals. Use the type the manufacturer or parts package recommends.
• Replacing only one O-ring. The rest of the set is usually worn to a similar degree.
• Ignoring the cartridge. If the handle still drips after the diverter is fixed, check the valve cartridge before replacing more parts.

Tips for a Lasting Repair

• Flush the showerhead screen and the diverter passage once a year to limit mineral buildup.
• If your water is hard, consider a screen or filter upstream to reduce scale on internal parts.
• Keep the old parts until the repair is confirmed, so you can compare them to replacements.
• Note the model number and the date of repair on a card in your toolbox for future reference.
• Work with the water off and a towel down in the tub to catch dropped screws.

Recommended gear

A few inexpensive tools make diverter repair much easier, especially on finished trim.

• Plastic handle puller helps lift a stuck handle without scratching chrome or brushed finishes. View on Amazon
• Silicone faucet lubricant keeps O-rings supple and helps the diverter move smoothly. View on Amazon
• Basin wrench reaches the mounting nuts under the tub deck where a standard wrench cannot. View on Amazon
• Faucet O-ring assortment lets you replace seals in the correct sizes when you don’t have the exact kit on hand. View on Amazon

FAQ

How do I know if my Kohler tub faucet has a diverter?

Look at the spout and handle. A pull-up knob on the spout, a push button, or a lever that changes flow between the spout and shower all indicate a diverter. If you turn on the faucet and then move the diverter, you will hear and feel the change in flow direction.

Why does water come out of the spout when the shower is on?

This usually means the diverter gate is not sealing fully. Worn O-rings, scale on the seat or a small piece of debris are the most common causes. Clean and inspect the diverter first before replacing the full valve.

Can I replace the diverter without replacing the whole faucet?

In most cases, yes. Many Kohler tub faucets are designed so the diverter component or its seal set can be replaced individually. Confirm the part against the diagram for your specific model.

Do I need to turn off the main water supply?

You can often work with just the tub’s local shutoff valves closed. If those valves are old or leak, shut off the main supply for the building to be safe.

How often should a diverter seal be replaced?

There is no universal schedule. Replace seals when they show wear, flattening or cracks, or when the diverter starts leaking. Frequent use and hard water shorten their life.

What if the diverter is stuck and won’t move at all?

Mineral scale is the usual cause. Remove the component, soak it in white vinegar, and brush the track gently. Do not force a stuck diverter, because that can break the stem or the body.

When should I call a plumber?

If the valve body is cracked, if water is leaking inside the wall, or if you cannot identify the model or source the correct parts, a licensed plumber is the safer choice. Shutting off water properly and checking for hidden damage is worth professional help.

Is a diverter repair kit better than individual parts?

A kit is often more convenient because it includes the seals that wear together. Individual parts make sense if you know exactly which component failed and it is available for your model.

Conclusion

A kohler tub faucet with diverter is a simple valve system, and most problems come down to worn seals, scale or debris. Identify your model first, inspect the diverter before replacing parts, and match any replacements to the manufacturer’s diagram. With the water off and a few basic tools, most homeowners can restore clean diverting in an afternoon.

Related reading

• Delta Tub Faucet Diverter Review: Features and Performance
• 7 Best Tub Faucet Diverter Repair Kit Options for Common Leaks (2026)
• Kohler Simplice Pulldown Kitchen Faucet Review: Features and Performance
• Kohler Simplice Kitchen Faucet: Features, Fit and Fixes for Owners

About Caleb Morgan

Caleb Morgan is part of our editorial team and reviews and edits our kitchen faucets & sinks guides, checking product details against manufacturer specifications and owner feedback.