Check Valve

The Evac check valve prevents the backflow of waste water after a discharge cycle. The check valve is a 2 inch in diameter, full port, vacuum-rated, flapper style valve.


  • Prevents backflow of waste water to vacuum piping
  • Provides a clean vacuum source to activator in gang lift configuration


The check valve is normally installed in the overhead piping of a two-stage lift to eliminate the possibility of fallback waste water.

The flapper inside the valve seals off the vacuum piping during normal or idle condition. When vacuum is applied by the activator, the waste water pooled in a reform pocket rushes through and momentarily opens the flapper.

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