With a clear body, the movement of the check will indicate flow.  Excellent flow characteristics. Minimum pressure loss. Mount horizontally or vertically. The soft seat (4) and weight loaded (5) check  offer excellent performance.  Efficient at low working pressures.  

• Pressure rating:  150 PSI @ 68F
• ½" through 3"
• EPDM or Viton® Seals
• Solvent cement spigot end connection