Product Overview

Protect valuable pool equipment from galvanic corrosion with the CMP 25810-400-950 Replacement Zinc Element. This genuine CMP replacement component is designed specifically for the Compact Pool Defender inline zinc anode system.

The zinc element acts as a sacrificial anode within the pool’s circulation and bonding system. When different metals are exposed to electrically conductive pool water, especially in saltwater pools, galvanic activity can cause vulnerable metal components to corrode. The zinc element is engineered to deteriorate before more expensive equipment, helping protect heaters, pumps, light niches, ladders, rails, and other bonded metal components.

As the zinc is gradually consumed, it must be inspected and replaced to maintain effective protection. Part 25810-400-950 allows the existing Compact Pool Defender housing to remain installed while only the depleted zinc element is replaced. This makes routine maintenance easier and more economical than replacing the complete assembly.

Key Features

Genuine CMP replacement component

Designed for the Compact Pool Defender system

Sacrificial zinc construction

Helps reduce galvanic corrosion

Protects bonded metallic pool components

Especially beneficial for saltwater pools

Reuses the existing Compact Pool Defender housing

Supports convenient periodic maintenance

Helps extend the service life of pool equipment

Replacement element only

Suitable for properly bonded residential and commercial pools

How the Zinc Element Works

The zinc element is intentionally more reactive than many of the metals used in pool equipment. When galvanic activity occurs, the zinc sacrifices itself by corroding first. This helps reduce the corrosion rate of more expensive bonded components.

The anode does not replace proper electrical bonding, grounding, water chemistry, or equipment maintenance. It works as part of a correctly designed pool system to provide an additional level of corrosion protection.

Specifications

CMP identifies 25810-400-950 as the replacement zinc element for the Compact Pool Defender models. It is not the replacement element used in the larger Deluxe Pool Defender assembly.

Package Contents

• One CMP Compact Pool Defender replacement zinc element

The inline housing, clear cover, O-ring, copper bonding wire, plumbing fittings, and complete Pool Defender assembly are not included.

Warranty & Compatibility

Compatibility

This replacement element is intended only for the CMP Compact Pool Defender system, including compatible compact assemblies such as:

• CMP 25810-400-050 with copper wire
• CMP 25810-350-050 without copper wire

It is not compatible with the CMP Deluxe Pool Defender, which uses replacement element 25810-200-950. Verify the existing housing model before ordering.

Inspection and Replacement

Turn off the circulation pump and relieve system pressure before opening the Pool Defender housing. Inspect the zinc regularly for excessive wear, mineral buildup, cracking, or significant material loss.

Replacement frequency depends on water chemistry, salt concentration, electrical conditions, pool use, and the number of bonded metal components. Replace the element when it is substantially consumed or no longer provides adequate exposed zinc surface.

Installation should be completed according to CMP instructions. Make sure the housing is properly sealed before restarting the circulation system, then inspect the assembly for leaks.

Warranty Information

Manufacturer warranty coverage is subject to CMP’s current terms, proof of purchase, correct product application, and proper installation. Normal zinc consumption is expected and is not considered a manufacturing defect.