Model TK-99D Delta Lite Backflow Preventer Test Kit is an advanced hand-held instrument designed to test pressure vacuum breakers, spill resistant vacuum breakers, double check valve assemblies, double check detector assemblies, reduced pressure zone backflow assemblies, and reduced pressure detector assemblies. In addition to its high impact housing, the test kit has an LCD display with oversized differential characters and a separate supply pressure readout gauge. This lightweight compact test kit features .25% full scale accuracy in addition to a low battery indicator and an automatic shutdown feature. Maximum Working Pressure: 200psi (13.79 bar).