Mazzei (MV-50 PP) 1/2" Metering Valve for 1" & 1.5" Injectors - PolypropyleneThe Mazzei MV 50 PP is a precision 1 2" metering valve engineered to regulate chemical flow into 1" and 1. 5" Mazzei venturi injectors. Built from durable polypropylene, this valve delivers reliable dosing control for agricultural, commercial, and industrial water treatment applications. SPECIFICATIONS Mazzei MV 50 PP Metering Valve Overview Model Number MV 50 PP Mazzei factory part Connection Size 1 2" Standard NPT threads Material Polypropylene