The Chemilizer HYDFG5003 diaphragm assembly is a genuine Hydro Systems replacement part designed for Chemilizer HN55 and CH9000-209 injectors. This diaphragm is the key component inside the water motor that drives the pump, ensuring reliable chemical injection and consistent dosing.
Though not often replaced, the diaphragm assembly is essential for restoring performance if the injector’s motor stops cycling correctly.
Product Specifications • Manufacturer part number: FG5003 • Weight: Approximately 0.34 lbs • Compatibility: Chemilizer HN55 and CH9000-209 Medicator/Injectors
How It Works Water flow powers the Chemilizer injector, moving the internal diaphragm assembly within the blue water motor. This motion drives the pump to accurately inject chemicals or medications into the water line—no electricity needed.
Keep your Chemilizer performing at peak efficiency with the durable, OEM HYDFG5003 diaphragm assembly.
