Speck Model 433 Viton O-Ring, 57mm x 5.7mm (2920341276) atlasminerals A cartridge like this is

A cartridge like this is useful because it helps restore filtration performance while preserving the original larger-end design used by the filter housing

Helps convert pneumatic input into maintained electrical switching action

Useful when original heater assemblies are worn or failing

Supports proper compatibility and cleaner service work

Speck Model 433 Viton O-Ring, 57mm x 5.7mm (2920341276) atlasminerals A cartridge like this isSpeck Model 433 Viton O Ring, 57mm x 5. 7mm (2920341276) is a replacement sealing part for compatible Speck Pumps equipment. It helps create or restore a watertight seal at the matching connection point, reducing leaks and supporting proper equipment operation after service, disassembly, or component replacement. Seals, o rings, and gaskets should generally be replaced whenever the related assembly is opened or when the original part is flattened,