Gadren Machine Company manufactures Bronze and Stainless steel float valves in sizes from 3/8" to 3" NPT and also stocks stainless steel, copper and plastic floats as well as our own pressure reducing valves and vacuum re......Gadren Machine Company manufactures Bronze and Stainless steel float valves in sizes from 3/8" to 3" NPT and also stocks stainless steel, copper and plastic floats as well as our own pressure reducing valves and vacuum relief valves. Our Knox line includes air hose fittings, double bolt clamps and air shut off valves for the industrial services market. Our products are used in cooling towers and for the petroleum and chemical industries, in food processing and agriculture as well as in the plumbing and plant maintenance trade. Gadren Machine operates principally in North America, Latin America and the Caribbean but also services customers needs worldwide.