The Pentair 1/16" x 1/2" Drain Plug O-Ring is a genuine OEM replacement part for Pentair Sand Dollar Filters, Pentair Tagelus Filters, Pentair Triton II Filters, Pentair EQ Series Commercial Plastic Pumps, Pentair IntelliFlo VF Pumps, Pentair IntelliFlo VS 3050 & VS + SVRS Pumps, Pentair WhisperFlo Pumps, Pentair Challenger High Flow Pumps, Pentair Challenger High Pressure Pumps, Pentair SuperFlo Pumps, Pentair Pinnacle High Flow Pumps, Pentair WaterFall Pumps, Sta-Rite IntelliPro VS + SVRS Pumps, Sta-Rite SuperMax Pumps, and Sta-Rite OptiFlo Pumps.