Hayward FD Heater High Limit Kit | FDXLHLI1930 Pool Filter Parts mineral cartridge condition and general

mineral cartridge condition and general water clarity

Material: Heavy-duty resin construction

The Pentair Union Kit is an authentic OEM replacement part

maintaining the integrity of your pool automation system

seal replacements

Hayward FD Heater High Limit Kit | FDXLHLI1930 Pool Filter Parts mineral cartridge condition and generalHayward FDXLHLI1930 High Limit Switch Kit (135F) for Universal H Series Low NOx FD Heaters The Hayward FDXLHLI1930 is a genuine OEM high limit switch kit rated at 135F for Hayward Universal H Series Low NOx FD pool heaters. The high limit is a critical safety device that helps protect the heater by shutting it down if internal water temperature rises beyond a safe thresholdmost commonly caused by low water flow, restricted circulation, or scale