Hayward FDXLBPK1930 Bypass Cartridge Kit – Universal H-Series Low NOx Heaters
Part Number: FDXLBPK1930
Description
This bypass cartridge kit is designed for select Hayward Universal H-Series Low NOx pool and spa heaters. It allows the heater to bypass the standard flow path when required, maintaining proper flow and operation while extending system life.
Compatibility & Fitment
- Fits Hayward H-Series “FD” model heaters (for example H150FDN, H150FDP, H200FDN, H200FDP, H250FDN, H250FDP) as originally specified.
- Recommended replacement when the existing bypass cartridge is worn, clogged, damaged, or the heater displays flow-related errors.
- Direct replacement for systems that list part number FDXLBPK1930.
Features & Specifications
- Bypass cartridge design optimized for the hydraulic requirements of Universal H-Series Low NOx heaters.
- Precision-engineered to maintain proper flow, pressure drop, and heater performance under varying conditions.
- Includes all cartridge components required for a full bypass assembly rebuild.
Installation Notes
Turn off heater system power and shut off gas supply. Drain or isolate the water flow through the heater and relieve system pressure. Remove the existing bypass cartridge assembly, inspect housing and seals for wear or damage, install the new FDXLBPK1930 kit ensuring proper orientation and seating. Restore water flow, purge air, power up the heater, and verify proper ignition and stable operation.
Maintenance Tip
Inspect the bypass cartridge during each annual heater service. If you detect debris buildup, restricted flow, scoring or wear on cartridge elements, replace with the FDXLBPK1930 kit to avoid flow faults, heater lock-outs or reduced efficiency.
