3/4" In-line Ball Cone SoftSeat Check Valves Stainless Steel Viton-Seated NPT Threaded Apollo #62-504-01 Model CVSE343 4" In line Ball Cone SoftSeat Check Valves Stainless Steel Viton Seated NPT Threaded Apollo #62 504 01 The Apollo 62 500 series check valves are ideally suited for lower flow applications in tough industrial environments, since seat and soft seat are less prone to vibration. The stainless steel body and check provide lasting protection against reverse flow. FEATURES Sizes 1 4 to1 No radial alignment necessary Bubble tight shut off, ideally suited