This part is a complete Waterway Pressurized Top Load Filter Housing that has 1 1/2" Slip glue in fittings in both sides that measure about 1 7/8" Inside Diameter... It is designed to mount in a niche so that the main body is under the shell of the spa, while the top is accessed from above the spa. This complete filter includes a niche lock ring (secures the body to the niche), lid lock ring (secures the lid), 50 sq. ft. cartridge, and lid w/o bromine feeder tube.
The diameter of the hole in the niche for this canister is 6-7/8"
