Deluxe Hot Tub Spa Filter 35 sq.ft.
This replacement hot tub filter is a compatible replacement for Pleatco PWW35L, Unicel 4CH-935 and Filbur FC-0170.
Top Hole: Handle
Bottom Hole: 1-1/2" FEMALE SAE Threaded (threads measure slightly larger inside diameter)
Brand: Pro Aqua by Magnum Filters
Please note: Unicel and Pleatco brands of this filter use threads on the bottom that are inside a raised hole. Magnum Filters have developed a new design for the bottom made with stronger ABS plastic, which leads to a more rigid filter and requires less threads to seat properly. The new ABS plastic ends are designed to last longer under the harsh conditions of spa water and though it looks a bit different is cross compatible with the older style threaded PWW50L and 4CH-949 filters.