Hayward H-Series Pilot Tube (HAXTRK1930) marathonelectric A cartridge like this is

A cartridge like this is useful because it provides the filtering surface that helps capture suspended debris and supports cleaner circulating water

and this G & P Tools version is designed in a 3/16 inch size using the 99-366-1040 reference

Internal manifold components are essential to filter function because they help manage the flow path within the tank and support proper filtration performance

5 kW Spa Heater Assembly is designed for compatible 2 inch by 15 inch applications where the original heater has become inconsistent or has reached the point where replacement makes more sense than continued troubleshooting

Matching the correct 115 and 230 volt transformer helps preserve intended compatibility and supports cleaner electrical service

Hayward H-Series Pilot Tube (HAXTRK1930) marathonelectric A cartridge like this isThis pilot tube is a replacement part for compatible Hayward H Series heater assemblies. In gas heater systems, the pilot tube helps route gas to the pilot area and must remain in good condition for safe, dependable ignition service. It is commonly replaced during pilot, burner, or ignition related repairs. For compatible Hayward H Series gas heaters Routes gas to the pilot assembly area Useful during pilot or ignition system service Helps maintain