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CMP 1-inch spa diverter valve three-piece O-ring kit

CMP 1-Inch Diverter Valve O-Ring Kit

$8.99

Three-piece aftermarket O-ring kit for compatible CMP 1-inch top-access spa diverter valves. Replaces the two valve-stem O-rings and larger sealing O-ring used inside one compatible valve.

  • For select CMP 1-inch plumbing diverter valves
  • Includes three replacement O-rings
  • Services one compatible valve
  • May help correct leaking or stiff valve operation
  • Independently sourced and assembled by EZ Hot Tub Parts

CMP and Waterway valves use different stem O-rings. Identify the valve manufacturer before ordering.

Have a Waterway valve instead? View the Waterway 1-Inch Diverter Valve O-Ring Kit.

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Repair the seals inside a compatible CMP 1-inch spa diverter valve without replacing the complete valve.

This three-piece aftermarket O-ring kit is assembled by EZ Hot Tub Parts for compatible CMP 1-inch top-access diverter valves. It replaces the two valve-stem O-rings and the larger sealing O-ring used inside the valve.

Replacing worn O-rings may help correct water seepage around the diverter, stiff handle movement and other sealing problems caused by O-rings that have become flattened, cracked, stretched, swollen or brittle.

This is not an OEM CMP-packaged kit. EZ Hot Tub Parts independently sources and assembles the replacement O-rings included in this kit.

What Is Included?

  • Two valve-stem O-rings selected for compatible CMP 1-inch diverter valves
  • One larger sealing O-ring
  • One complete three-piece kit for servicing one compatible valve

The diverter handle, cap, stem, internal gate and valve body are not included.

CMP and Waterway Kits Are Different

CMP and Waterway 1-inch diverter valves can look very similar from above, but they use different valve-stem O-rings. The CMP and Waterway kits are not interchangeable.

Look for a manufacturer name or marking molded into the cap, stem or another valve component. If no marking is visible, compare the original valve components with the product images or send us clear photos before ordering.

Understanding the 1-Inch Valve Size

The 1-inch designation refers to the valve’s plumbing size. These smaller diverter valves should not be confused with substantially larger 2-inch plumbing diverter valves, which commonly have a palm-sized handle approximately 4–5 inches across.

Do not identify the valve by spa brand or model year alone. Spa manufacturers may use CMP, Waterway or other valve designs during the same production period.

Common Signs the O-Rings May Need Replacement

  • Water seeping from underneath the diverter handle or cap
  • A diverter handle that has become unusually stiff
  • Flattened, cracked, stretched or swollen O-rings
  • Visible damage to the existing valve-stem seals
  • A valve that operated correctly before the seals deteriorated

If the cap, stem, internal gate or valve body is cracked or damaged, replacing the O-rings may not correct the problem. A complete valve or additional replacement components may be required.

Installation Notes

Shut off power to the spa before opening or servicing the diverter valve. Remove the original O-rings carefully and clean the sealing surfaces before installing the replacements. Avoid twisting, stretching or cutting the new O-rings during installation.

Use only a lubricant specifically approved for spa and pool O-rings. Do not use petroleum jelly or another petroleum-based lubricant, as it may damage compatible sealing materials.

CMP 1-Inch Diverter Valve O-Ring Kit FAQs

No. This is an aftermarket replacement kit independently sourced and assembled by EZ Hot Tub Parts for compatible CMP 1-inch diverter valves. It is not manufactured or packaged by CMP.

The kit includes two valve-stem O-rings and one larger sealing O-ring. It contains the three O-rings needed to service one compatible CMP 1-inch diverter valve. The handle, cap, stem, gate and valve body are not included.

No. CMP and Waterway 1-inch diverter valves use different valve-stem O-rings. The kits may look similar, but they are not interchangeable. Select the kit that matches the manufacturer of your valve.

No. CMP has manufactured multiple valve sizes and designs. This kit is intended for the compatible CMP 1-inch plumbing diverter valve shown in the product images. It is not intended for a larger 2-inch plumbing diverter valve.

No. The 1-inch designation refers to the nominal plumbing size of the diverter valve. It does not describe the diameter of the handle, stem or individual O-rings.

They may correct water seepage caused by worn valve-stem or internal sealing O-rings. New O-rings will not repair a cracked cap, broken stem, damaged internal gate, cracked valve body or a separate plumbing leak beneath the spa shell.

It may help when stiff operation is caused by swollen, damaged or deteriorated O-rings. The sealing surfaces should be cleaned during installation, and the new O-rings should be lubricated only with an O-ring lubricant approved for spas and pools.

Inspect the cap, valve stem and other removable components for a CMP name or molded marking. Because spa manufacturers may use more than one valve supplier, do not rely on the spa brand or model year alone. Send us clear photos if you cannot identify the valve.

✅ Not Sure It Fits? Verify Before Ordering

CMP and Waterway 1-inch diverter valves can look similar but use different valve-stem O-rings. The spa brand or model year alone does not settle it: identify the valve manufacturer and match the internal components.

To help us identify the correct replacement, please send clear photos of:

  • The complete diverter handle and cap from above
  • The underside of the removed cap
  • The valve stem and existing O-ring locations
  • Any CMP name, logo or number molded into the valve parts
  • Your spa serial number sticker, if available

EZ Hot Tub Parts can help confirm fitment before you order and help reduce costly returns.


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