This is a Pentair 1/4 Inch Air Relief Strainer for Triton II, Triton C-3 Fiberglass Sand Filters Models TR100C, TR140C, TR100C-3, and TR140C-3. Measurements are: 1-1/4 inch Diameter x 7/8 inch Height. This air relief strainer is for filters manufacturer prior to 11-1-99.








