Seamless Compatibility: Designed to work effortlessly with both Seagull X-1F, X-1D, X-1B, X-1P systems and PurestOne TP-1, offering versatility and flexibility in water filtration solutions. Advanced Filtration Technology: Employ cutting-edge filtration mechanisms to effectively remove pullutants, heavy metals, and chemicals, ensuring the purity and safety of your water supply. User-Friendly Installation: Facilitate a straightforward installation process, enabling users to seamlessly integrate the water filter into their existing Seagull or PurestOne systems without the need for complex adjustments or modifications. Long-lasting Performance: Provide durable filter cartridges with an extended lifespan, reducing the frequency of replacements and maintenance tasks, while consistently delivering high-quality filtered water. Suggest to replace after running 1000 gallons of water through the system or reaching the 6-12 month threshold, whichever comes first. 2 Filter included. Dimension 4″D x 4″W x 4.2″H».