Pentair 400K Heater Heat Exchanger Kit [After Jan 2009] (474061) essexgroup Helps capture debris inside the

Helps capture debris inside the skimmer assembly

When selecting a replacement cartridge

For compatible insider return installations

OEM Hayward faceplate screw kit

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Pentair 400K Heater Heat Exchanger Kit [After Jan 2009] (474061) essexgroup Helps capture debris inside theThe Pentair 400K Heater Heat Exchanger Kit [After Jan 2009] (474061) is a replacement heat exchanger kit for compatible 400,000 BTU Pentair heater models manufactured after January 2009. The heat exchanger is one of the most important components in a pool or spa heater, transferring heat from the combustion process to the water moving through the system. When a heat exchanger is leaking, restricted, corroded, or otherwise damaged, heater performance