Pleatco Cartridge [30 Sq Ft Coreless 3-3/8" T 4-1/2" B 8" 6-1/4" L 3oz] (PBF40) maytronics A drain plug is useful

A drain plug is useful because it helps seal the system during operation while still allowing the heater to be drained when service or seasonal maintenance is needed

so they may crack

Useful for ongoing use or higher-volume stocking needs

and this Perma Cast version is a brass cast design using the PE-8 reference

Supports secure attachment and easier cleanout

Pleatco Cartridge [30 Sq Ft Coreless 3-3/8" T 4-1/2" B 8" 6-1/4" L 3oz] (PBF40) maytronics A drain plug is usefulPleatco Cartridge [30 Sq Ft Coreless 3 3 8" T 4 1 2" B 8" 6 1 4" L 3oz] from Pleatco Filters is a practical replacement component for pool and spa service work where the correct fit, material, and part configuration matter. This part is intended to help restore dependable equipment operation while keeping repairs focused and efficient. Use the listed part number, PBF40, along with the product dimensions and system requirements to confirm compatibility