1597 & 1598 Liquid Withdrawal Valves consist of a service valve and an excess flow valve

A1597R Has a built-in "Tri-Gard" internal relief valve that bleeds product back to the tank when hose pressure exceeds tank pressure by 50 PSI. In this way hose life is extended and chance of hose rupture is reduced.

A1598P has a 1/4" FPT plugged side port which can be used for installation of a hydrostatic valve.