Sorry, this is no longer available from the manufacturer. You may purchase the complete Rainbow RTL filter canister here.
Rainbow RTL / RCF Filter Canister Housing (also includes part # 8 - By-pass Assembly).
1.5 inch slip connectors (The O.D. of the flex hose that fits this canister is slightly larger than 1-7/8").
Fits Unicel C4326, C4625, C-4637 or C4950.