Rebuildable & Adjustable OPV Over Pressure Valve – Stainless SteelRebuildable & Adjustable OPV Over Pressure Valve – Stainless Steel* Easy to adjust from 150 to 250 psi* Factory preset at 200 psi ( /- 10 psi)* All stainless steel construction with Viton O-rings* Machined Delrin cap protects the adjustment point* Compact relief valve releases pressure in the event of an over* pressurization of the first stage* Fits standard 3/8”-24 UNF MP regulator port*** Service Kit for AC396 *** (SKU : AC396K )