4 Inch Flanged Cast Iron Swing Flex Check Valve Built Tough For Water And Plumbing ASTM A126 250 PSI Max Cracking Pressure 0.25 PSI Horizontal Mount 11 Inch Long By 9 Inch Wide Heavy Duty Industrial Valve

4-Inch Flanged Cast Iron Swing Check Valve, 250 PSI
✔️ Each unit, 250 psi max, 0.25 psi cracking, 11 x 9 in

This 4 in. swing flex check valve uses cast iron (ASTM A126) with Buna N seat to prevent backflow in horizontal water and plumbing lines. It is compatible with residential, commercial, and light industrial piping where backflow protection is required.

✅ Size 4 in., Flanged connection, Cast Iron ASTM A126
✅ Max water pressure 250 psi
✅ Cracking pressure 0.25 psi
✅ Temperature range -70°F to 215°F
✅ Seat material Buna N; Horizontal mounting
✅ Flow up to 500 gpm; ANSI B16.1 Class 125

💡 What is a 4 inch cast iron swing check valve used for in water and plumbing applications? This device helps prevent backflow in horizontal piping and protects pumping equipment.
- Prevents reverse flow in water supply lines
- Fits 4 in flange connections for ANSI B16.1 Class 125 systems
- Uses Buna N seat for reliable sealing in hot and cold water
- Suitable for residential, commercial, and light industrial installations

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