The Dwyer LPTK02 Low Pressure Gas Test Kit, 0 to 32 in w.c tests LP and natural gas lines and controls. The LPTK-02's gauge shows if proper pressure is present or if a leak exists. The LPTK-02 offers a gauge range of 0 to 32 in w.c and each gauge is 3% full scale accurate with an easy to use calibration screw on the back of the gauge. It is easier to use than a manometer, and includes a sturdy case for added durability and safe handling.