1", Inline Jar Top Valve With Flow Control, Male NPT x Barb Threaded, Fast & Easy Servicing, Flow Control Allows For Precise Adjustment After Installation, Manual Internal/External Bleed, Full Stainless Steel Metering System, Rugged, Double Beaded Santoprene Diaphragm Provides Leak-Proof Seal, Encapsulated Solenoid.