Product Overview The CMP Pool Defender Inline Zinc Anode 25810-400-050 is a compact sacrificial zinc anode and water bonding device designed to help protect pool equipment from galvanic corrosion and electrolysis. Installed inline with the pool plumbing and connected to the pool bonding wire, this device gives corrosive electrical current a preferred path to attack the replaceable zinc anode instead of valuable metal pool components. This compact Pool Defender model is especially useful for saltwater pools, where salt chlorine generators can increase the risk of corrosion to heaters, pumps, lights, ladders, rails, and other metal equipment. The clear, removable lid allows easy inspection and replacement of the zinc anode when it becomes depleted. Ideal For This inline zinc anode is ideal for pool builders, service technicians, repair professionals, and pool owners looking to add corrosion protection and water bonding to compatible pool systems. It is commonly used on saltwater pools, new pool builds, equipment pad upgrades, and systems with heaters or other metal components that need added protection. Key Features Compact Inline Sacrificial Zinc Anode Designed to install directly into the pool plumbing line to help protect metal components from galvanic corrosion. The zinc anode acts as the sacrificial component, corroding before more expensive pool equipment is affected. Helps Protect Saltwater Pool Equipment A recommended corrosion-protection accessory for salt chlorine generator systems. Saltwater environments can increase electrolysis and corrosion risk, making sacrificial zinc protection especially valuable. 2" or 2-1/2" Slip Plumbing Compatibility Designed for slip plumbing installations and commonly listed for 2" or 2-1/2" plumbing configurations. Always confirm plumbing size and installation location before purchase. Clear Removable Lid The clear lid allows visual inspection of the zinc anode without disassembling the full plumbing setup. The removable lid design also allows the anode to be replaced once depleted. Includes Copper Ground Wire The kit includes 4 feet of solid copper ground wire for connection to the pool bonding system. Proper bonding is required for safe and effective installation. Water Bonding Device The Compact Pool Defender is commonly listed as meeting NEC2008 680.26(C) standards as a water bonding device. It is also listed as complying with UL-1081, UL-1563, and CSA C22.2-218.1 standards. Benefits The CMP 25810-400-050 Pool Defender helps protect expensive pool components from corrosion caused by stray electrical current and galvanic activity. By sacrificing the zinc anode instead of metal pool parts, it can help extend the service life of heaters, pumps, light fixtures, rails, ladders, and salt system components. The compact inline design makes it practical for tight equipment pads, while the clear removable lid makes maintenance easier. For best results, inspect the zinc regularly and replace the zinc element once it is significantly depleted. Specifications Specification Details Product Type Inline Sacrificial Zinc Anode / Water Bond Brand CMP / Custom Molded Products Series Pool Defender Model / Part Number 25810-400-050 SKU 25810-400-050 UPC / Barcode 849640025246 Plumbing Compatibility 2" or 2-1/2" slip plumbing Application Galvanic corrosion protection and water bonding Pool Type In-ground and compatible pool plumbing systems Recommended Use Saltwater pools, pools with heaters, metal components, or bonding requirements Included Components Compact inline anode housing, sacrificial zinc anode, clear removable lid, 4 ft solid copper ground wire Approximate Zinc Life Commonly listed as approximately 3 years, depending on water chemistry and pool conditions Standards / Certifications Commonly listed as NEC2008 680.26(C), UL-1081, UL-1563, CSA C22.2-218.1 compliant Installation Type Inline plumbing and bonding wire connection Product Condition New Replacement Part Customer-Facing Q&A Q: What does the CMP Pool Defender Inline Zinc Anode do?A: It helps protect metal pool equipment from galvanic corrosion and electrolysis by using a replaceable zinc anode as the sacrificial component. Q: Is this good for saltwater pools?A: Yes. This is commonly recommended for saltwater pools because salt chlorine systems can increase corrosion risk to metal pool parts. Q: What plumbing size does this fit?A: It is commonly listed for 2" or 2-1/2" slip plumbing. Confirm your plumbing size before ordering. Q: Does this connect to the pool bonding wire?A: Yes. The inline anode connects to the pool bonding system and includes 4 feet of solid copper ground wire. Q: How do I know when to replace the zinc anode?A: The clear removable lid allows visual inspection. Replace the zinc when it is significantly depleted, commonly around half-eroded or according to manufacturer/service recommendations. Q: How long does the zinc anode last?A: It is commonly listed as lasting approximately 3 years, but actual life depends on water chemistry, salt level, electrical conditions, and pool usage. Q: Does this replace proper pool bonding?A: No. It must be installed as part of a properly bonded pool system according to applicable electrical codes and manufacturer instructions. Q: Should this be installed by a professional?A: Professional installation is recommended because this part involves both pool plumbing and bonding-system connection.
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