The A2-H8FVL Perma-Loc flush valve reduces pressure on the drip system and allows drainage from 920/940 size solid tubing. The flush valve is designed to close on flow rate and to open on low psi as follows:
Open to Flush when pressure falles below 2 psi
Closes to Operate with flows of 0.7 gpm or greater
No leaks, easy to install and lasts the test of time!