If the Ambient Temperature on the gauge (indicated by the pressure reading on the gauge) is close to the outside surrounding ambient temperature, there is liquid in the tank.  If the reading is materially lower, there is vapor in the tank and an interruption of service could have occurred or the tank could be too small to service the propane demand.

Simply remove the Presto-Tap® LDS/2000RV black UV Resistant cap and attach the # 6800-BH-90 Quick Coupler to obtain a pressure reading.  To perform a leak test, close the tank service valve after admitting full container pressure to the system, slightly open the Bleeder Valve releasing about 10 pounds of pressure and retighten, and observe the gauge pressure for any movement for 3 minutes (or time specified by your company policy).  A decrease in pressure indicates a leak downstream.  An increase indicates a faulty or damaged seat in the container valve (repair with appropriate bonnet replacement and re test).

Stainless Steel Case with Vent Plug Lever (to adjust to zero due to changes in temperature that affects pressure reading – maintain Vent Plug in CLOSED position or liquid will escape) – Ambient Operating Temperature (Glycerin Filled): -40°F to 160°F (-40°C to 71°C) U.S Patented & Canadian Patented.