Replacement Type S1 Spa Filter Cartridge for Intex PureSpa models 28429E, 28403E, 28407E, 28443E, 28453E, 28421E, 28423E, 28413E Key benefits Effective filtration removes hair, leaves, dust, sediment, sand, and other debris to keep spa water clearer and extend pump life. Durable pleated fabric and a reinforced flow core maintain structure under load and support consistent water flow. Washable and reusable design reduces the need for frequent replacements and simplifies maintenance. Features and specifications Type: Replacement Type S1 spa filter cartridge Compatibility: Compatible with PureSpa models 28429E, 28403E, 28407E, 28443E, 28453E, 28421E, 28423E, 28413E Material: Pleated filter fabric with a reinforced flow core for durability and stable performance Function: Captures fine and coarse particles while allowing water flow through the pump Maintenance and cleaning Easy to clean: remove the cartridge from the filter pump, scrub with a filter cleaning tool, then rinse thoroughly with a pressure hose until clear. Reusable: after drying, the cartridge can be reinstalled for continued filtration. Practical use scenarios Routine spa maintenance: swap in a fresh cartridge during regular cleaning to maintain water clarity and pump efficiency. Seasonal reopening: or clean cartridges when preparing an inflatable spa for summer use to remove accumulated debris. After heavy use or outdoor exposure: clean or the cartridge following pool parties or windy, debrisprone weather to restore filtration. Why choose this cartridge Designed to fit specified PureSpa models for straightforward replacement Built to withstand repeated cleaning while maintaining filtration performance Simple removal and cleaning process helps reduce downtime and keeps your spa ready for use Compatibility reminder Intended for use with PureSpa models 28429E, 28403E, 28407E, 28443E, 28453E, 28421E, 28423E, 28413E.