Home / Shop Spare Parts / Butterfly, Ball, & Knife Gate Valves / Safety Valves Product Description 1 1/2" Safety Valve Adjustable Pressure Release Valve for Vacuum Trucks and Vacuum Trailers Adjustment by loosening the hex socket bolt 1.5" Diameter, 250 CFM Adjustable from 4 to 22 psi. Non Code, Durable Brass Construction BSP Male Connection Compatible to PA7B2000 Specifications MPN S0150013 Product Code S0150013 Weight 1.2kg Customer reviews No reviews left yet Write A Review Sort byMost RecentTop Rated Delivery & Returns Customer Reviews 1 1/2" MZ Safety Valve Product Code S0150013 1.1/2" Safety Valve £66.40 £79.68 (inc. VAT)