Crispin Combination (Dual) Sewer Valve S/SL

Air & Vacuum Sewer Valves and Pressure Sewer Air Release Valves are piped together to perform a dual function at the high point on a line. After the Air & Vacuum Sewer Valve relieves the large volume of air in the line and seats, the Pressure Sewer Valve continues to release entrapped air and gas accumulations

Crispin Combination Sewer Valve Features S/SL series

Standard and high capacity series available

• Short body style available

Standard Materials

• Cast iron with Stainless Steel trim

• Backflushing attachment optional 


  • 2” thru 10” available

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