Product: Replacement Pool Filter Cartridge — Compatible with Pure Spa (S1 29011E) Why you need this filter Restores proper water flow and filtration: replaces worn or clogged cartridges to keep water clear and maintain heater efficiency. Prevents debris buildup: captures hair, lint, dirt and other particles that reduce circulation and strain pump and heater systems. Simple, reliable compatibility: designed to fit Pure Spa pools using model S1 29011E and standard filter housings. Key features and specifications Compatibility: For S1 29011E filter cartridge — compatible with Pure Spa pools. Function: Replaces old or damaged cartridge to avoid debris buildup in pools and heater systems and to maintain flow. Maintenance guidance: Clean weekly; monthly or sooner for performance and clean water. Dimensions: Outer diameter 108 mm, inner diameter 43 mm, height 74 mm — fits standard housings. Performance and benefits Keeps circulation steady and reduces strain on pump and heater by restoring correct flow. Helps maintain water clarity and reduces time spent on manual cleaning. Predictable maintenance schedule (weekly clean, monthly replacement) simplifies care and helps prevent system damage. Practical use scenarios Regular home spa maintenance: Swap the cartridge during routine monthly upkeep to maintain water quality and heater performance. After heavy use or gatherings: the cartridge after events with many bathers to remove increased debris and restore flow. Seasonal checks or before storage: Clean weekly during peak season and install a fresh cartridge before leaving the spa unused for extended periods. What to expect A directfit replacement for Pure Spa S1 29011E applications that fits standard housings without modification. Clear maintenance guidance to get consistent results: weekly cleaning and monthly replacement or sooner when water or flow indicates clogging. If you own a Pure Spa using model S1 29011E, this cartridge restores filtration performance and protects your pump and heater by preventing debris accumulation.