Pentair Pentair 274494 Adapter O-Ring Replacement Pool/Spa Filter, Heater and Valve

This adapter o-ring is designed to use with Pentair FNS, Nautilus, Nautilus Plus D.E. and TR100C, TR140C, Triton II, Triton C, Triton C-3 sand pool and spa filters and also compatible with Pentair Minimax NT STD, NT LN and NT TSI pool/spa heaters. Also fits Pentair HiFlow, FullFlow and Push Pull pool/spa valves. Measures 2-3/4-inch length by 2-3/4-inch height by 1/4-inch width.