Hayward H-Series Bulb Well After 6/1/01 (HAXTBW1930) pallighting A filter cartridge is useful

A filter cartridge is useful because it helps remove suspended debris from circulating water

The Magna Flow design helps preserve the intended seat character of the original setup

and general system response while keeping the spa feeling natural to use

A properly selected cartridge pack helps restore intended filtration support and contributes to a cleaner maintenance cycle

Hayward H-Series Bulb Well After 6/1/01 (HAXTBW1930) pallighting A filter cartridge is usefulDesigned for Hayward H Series heaters built after June 1, 2001, this bulb well provides the protective pocket needed for proper sensing component placement inside the heater assembly. It helps shield the sensing bulb from direct exposure while still allowing accurate temperature response, making it an important part when restoring dependable heater operation. A worn, damaged, or corroded bulb well can affect serviceability and should be replaced with