TEEJET BRASS PRESSURE RELIEF VALVE - 3/4" NPT - 300 PSI - 878-681534300 Features: 6815 Series Pressure Relief Valve Bypasses excess liquid. Adjustable to maintain control of line pressure at any pressure within the valve’s operating range. Selected pressure setting firmly held in place by locknut. TechSpecs: Brand: TeeJet Connection: NPT Connection Size: 3/4 Inch Connection Specification: 3/4" Female NPT Material: Brass Max PSI Rating: 300 PSI Spray Valve Category: Pressure Regulating Valves Spray Valve Type: Manual Valves Interchanges: 68153/43815343008786815343003/4/68156815-3/451430346815-3/4-3005168752 68153/4 381534300 878681534300 3/4/6815 6815-3/4 5143034 6815-3/4-300 5168752 This is an aftermarket part.