Quick view Superlok Superlok Inline Relief Valve, 1/2" O.D. Tube, Angle Pattern, Low Pressure, 300psi, 10 to 250psi adjustable range, 316SS - SS-RL4S8 This Superolok adjustable relief valve fitting is a bore through connection, allowing a pipe to pass MSRP: Was: Now: $385.00 Add to Cart