Pleatco Pool Filter Cartridge Replacement for American Quantum CM, RPM 125/500, Waterway Crystal Water 425 | PCC105-EC Standard 2.5" This housing unit accommodates a

This housing unit accommodates a side‑feed 1

water features

5" MPT connection for easy compatibility with standard plumbing

they are different in size as 2 of the screws are long

Pleatco Pool Filter Cartridge Replacement for American Quantum CM, RPM 125/500, Waterway Crystal Water 425 | PCC105-EC Standard 2.5" This housing unit accommodates aTheir filters have been designed to meet high quality standards and outperform all other filters in the market. Pleatco filters are engineered to meet or exceed OEM specifications for pool and spa water filtration. The Pleatco Advanced filtration fabrics have been uniquely designed to have the highest fiber count in the industry and deliver the most advanced filtration technology available. For Filters: Pentair Clean & Clear Plus 420, 520 (pre 1998)