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Versatile fuel compatibility: Works with both Natural Gas and Liquid Propane
Replacement cartridge identified by SKU FC-1226
Their UHS heater platform is widely used across residential pools
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Hayward Water Pressure and Flow Switch | HPX2181 Martillo Versatile fuel compatibility: Works withWhat This Part Is Used For The Hayward HPX2181 Water Pressure and Flow Switch monitors circulation in compatible Hayward heater systems. It verifies adequate water flow before allowing the heater to fire. Why This Part Matters Low flow conditions can damage the heat exchanger if the heater operates without sufficient circulation. A malfunctioning switch may cause nuisance shutdowns or prevent startup. Replacing a failed switch restores safe operation
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