The Waterway 570-0525-07 Crystal Water Cartridge Filter is a replacement water cartridge filter that combines high technology and has an easy-to-service design. This filter has a fiberglass reinforced polypropylene body for superior strength and offers an extraordinary choice for easy maintenance and crystal clear, sparkling clean water. The Waterway Crystal Water Cartridge Filter has 2-1/2" internal piping, improving flow and reducing system noise when using 2 -1/2", 2" or 1 -1/2" plumbing. This water filter cartridge is perfect for new and replacement installations.

Specifications:

• Brand: Waterway
• Model Number: 570-0525-07
• Internal piping: 2 1/2"
• Valve Bulkhead Unions (includes 2″ and 1 1/2″ reducers): 2 1/2″ 

Resources:

Waterway Crystal Water Cartridge Pool Filter Review