CMP 25810-400-050 Pool Defender 2 in. compact sacrificial zinc anodeCMP Pool Defender 2 in. Compact Sacrificial Zinc Anode, 25810-400-050 In stock$8399
CMP 25810-400-050 Pool Defender 2 in. compact sacrificial zinc anode
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CMP Pool Defender 2 in. Compact Sacrificial Zinc Anode, 25810-400-050

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$8399
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Quick overview

  • Sacrificial by design The zinc corrodes in place of the metal parts in your equipment and pool.
  • Compact body The newer space saving design fits where a full size inline anode will not.
  • Bonding wire connection The inline anode connects to the pool bonding wire, and 4 ft of solid copper ground wire is included.
  • Meets NEC 2008 680.26(C) Inline Pool Defenders qualify as a water bonding device under that code section.
  • Listed to three standards Complies with UL-1081, UL-1563 and CSA C22.2-218.1.
  • Replace at half gone Swap the inexpensive zinc when about half of it has eroded, roughly every 3 years.
Full description and specifications ↓

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Product details

The CMP 25810-400-050 is the compact version of the Pool Defender, an inline sacrificial zinc anode that plumbs into 2 in. pipe. It ships with 4 ft of solid copper ground wire.

The problem it solves

A pool carries electrical current from several sources, and that current keeps flowing even when the pump is off. In salt water it is stronger still. Left alone it eats away at heaters, rails, fittings and anything else metal in the system. Building codes now expect that current to be controlled.

How it works

Zinc gives the current an easier path than your expensive metal components, so the anode corrodes and they do not. Bonded correctly, the inline Pool Defender helps protect the whole pool from galvanic corrosion, and the compact body fits in tighter equipment pads than a full size anode.

Service

Check the zinc as part of normal maintenance and replace it once about half of it has eroded, which typically works out to every three years or so. The replacement is inexpensive compared with the parts it protects.

Specifications
Brand CMP
Manufacturer part number 25810-400-050
UPC 849640025246
Type Inline sacrificial zinc anode
Model Pool Defender Compact
Plumbing size 2 in.
Connection Connects to the pool bonding wire
Included 4 ft of solid copper ground wire
Service life Approximately 3 years
Code Meets NEC 2008 680.26(C) as a water bonding device
Compliance UL-1081, UL-1563, CSA C22.2-218.1
Patent US 7,655,116 B1
Shipping weight 2.8 lb
Ships Parcel

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Questions and answers

What people ask about this product, answered by our pool techs.

What does a sacrificial anode actually do?
It gives stray electrical current an easier path to follow. The zinc corrodes instead of your heater, ladder, light ring and other metal parts, which is why it is called sacrificial.
Do I need one on a salt pool?
Salt water enhances the electrical currents already present in a pool, so the corrosive effect on metal parts is stronger. That is the situation these anodes are built for.
How often do I replace it?
Replace the zinc once about half of it has eroded. CMP puts the typical life at around 3 years.
Does it satisfy code?
Inline Pool Defenders meet NEC 2008 680.26(C) as a water bonding device, and the compact model complies with UL-1081, UL-1563 and CSA C22.2-218.1. Confirm local requirements with your inspector.
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