Manufacturer of high quality brass check valves for industrial use. Made in Fort Wayne, IN since 1939. Available in sizes 3/8" - 3" NPT. Feature a unique fully-formed rubber poppet that is molded on a stainless steel stem, a more durable solution than o-rings. Various types of rubber poppets are available to suit any application. Strataflo also uses a proprietery stainless steel poppet, precisely machined for a fine metal-to-metal seal.