A key feature of Westminster, Calif.-based Blue-White Industries’ CHEM-FEED C-1100 series is the Heavy Duty Double Ball Valve Cartridge Head. The design of the head starts with Bullet Cartridge Valves constructed of Tough PVDF. Each valve has two ceramic ball checks and is double sealed with High Grade Viton O-rings. The double ball valve design ensures enhanced priming and the pump head is excellent for purging air and gas. The pump housing is constructed of attractive black Valox that offers true weather resistance.