Hayward KNOB WASHER (SET OF 2) - Hayward 120 Sq Ft Star Clear Plus Cartridge Filter | CX900WPAK2 Hayward 200 Sq Ft Swimclear Single Element Cartridge Filter ✔ Clean the O-Ring Groove

✔ Clean the O-Ring Groove – Remove any debris or buildup to ensure a tight seal

preventing scratches and tarnishing

A mono-layer (one molecule thick) is formed on the water surface

Three easily interchangeable throats improve debris passage and suction performance

Lateral assembly for 200lb Hayward Pro Series filter

Hayward KNOB WASHER (SET OF 2) - Hayward 120 Sq Ft Star Clear Plus Cartridge Filter | CX900WPAK2 Hayward 200 Sq Ft Swimclear Single Element Cartridge Filter ✔ Clean the O-Ring GrooveHayward KNOB WASHER (SET OF 2) Part CX900WPAK2 The Hayward Knob Washer Set (Part # CX900WPAK2) includes two high quality washers designed for use with Hayward pool filter systems. These washers are an essential component for ensuring a secure, leak free connection between the filter lid and the locking knob, preventing leaks and helping to maintain optimal filtration system performance. Made from durable, corrosion resistant material, the CX900WPAK2