Pool & Spa Filter Cartridge End Cap Guide
Use this guide to help identify the replacement cartridge end cap configuration for your pool or spa filter. Matching the correct end cap style is one of the key steps in finding the right replacement cartridge.
There are currently 36 common filter cartridge end cap configurations available on the market. Compare your existing filter cartridge to the images below and use the Filter Finder if you need help narrowing down the replacement.
Need help identifying your filter? Call us at 800-918-9143 during normal business hours and our team can help you compare measurements, part numbers, end caps and cartridge style.
Filter Cartridge End Cap Configurations
Search by end cap description or browse the complete visual guide below.
Open
Open With 12 Concentric Holes
Open With 12 Concentric Slots
Open With Raised Ring
Open With Lip Seal
Open With Beveled Edge
Open With Molded Gasket
Open With Molded O-Ring
Open With Slots
Open With Step
Open With Twist Lock
Semi-Circle Handle
Male Slip Fitting
SAE Thread
Male Thread (MPT)
Bar Handle
Castle
Castle With Cross Ribs
Closed
Closed With 2 in SAE Thread
Closed With Three Step Edge
Closed With Raised Ring
Closed With String Handle
Closed With String Loop
Closed With Y Stand-Offs
Hose Fitting
Injection Molded Cone Adapter
Injection Molded Knob Handle
Male Slip Fitting With Molded O-Ring
Male Slip Fitting With MPT
Molded Cone Handle
V-Groove Semi-Circular Handle
Injection Molded 1 1/2 in SAE Thread
2 in Female SAE
3 1/2 in Female Thread (FPT)
Dual Bar Handle
Helpful tip: When replacing a filter cartridge, compare more than the end cap style. Also confirm length, outside diameter, inside diameter, thread type, top and bottom cap configuration, manufacturer part number, and any cross-reference numbers before ordering.