Hayward Star-Clear W3C500 50 SqFt Cartridge Filter 50 gpm. Star-Clear cartridge filters provide crystal clear water and have extra cleaning capacity to accommodate pools and spas of all types and sizes. For replacement or new pool installations, Star-Clear sets the standard of excellence and value.
 
Features 
 
Single locking knob securely fastens head to filter tank, eliminating bolts or clamps
Attractive, durable filter head may be rotated to conveniently position pressure gauge and manual air relief
Injection-molded filter tank for dependable, corrosion-free performance
Extra-large cartridge element with precision engineered core provides extra-strength and maximum flow
Elevated, filtered water collector and debris sump prevents accidental bypass of heavy debris to pool or spa when cartridge is removed for cleaning
1-1/2" or 2" FIP, or 2" SKT connections for plumbing versatility
1/2" FIP filter drain for fast draining of elevated spas and tubs. Also accepts standard spigot valve