This backflow prevention assembly test kit is designed for field testing of all brands of reduced pressure principle, double check and pressure vacuum breakers. • Test kit with five control valves • Accuracy: +/- .2 P.S.I.D. (descending) • Dial size: 4 1/2" round, 0 - 15 P.S.I.D. (descending) • Maximum working pressure: 200PSI