Our N71 series interchange with Snaptite 71-3 and 71-2 (except 1" size). These are a unique, flush face, push-to-connect, coupling designed specifically for rugged, "high impulse" applications. For high impulse applications, the rated working pressure of these couplings is reduced to about x.60 of the below static working pressures. The couplers have large, high flow chambers for a low pressure drop. The maximum recommended connect/disconnect pressures are: 300 psi for 1/4", 150 psi for 3/8"-3/4", 75 psi for 1". Standard parts have a Buna seal and plated steel body.