Penberthy 3/8 lifting steam injector 0021. This is a hard to find 3/8, 0021 steam injector, in very good condition. too often injectors were hammered to dislodge obstructions..not this injector, its in pristine condition, The smallest size penberthy injector, they do not become available often. It is a stock LB (left inlet back discharge) min operating pressure 25psi max 140psi with 20ft max lift, this injector is fitted with a relief valve to assist with starting at lower pressures.