Includes 25 sq. ft. filter cartridge. The Rainbow RDC 25 is designed for access under the spa cabinet or deck.
Fits 1.5 inch standard plumbing with slip connections. (The Oustide Diameter of 1.5 inch flex hose or hard pipe is slightly larger than 1-7/8".)
Measures approximately 18" high & the Outside Diameter of the lock ring is 7.5".