The R-3714-3000 1/4" X 1/4" X 1/4" Diode Restrictor Tee Provides through Line Low Volume Exhaust whenever Pressure to the Diode Branch is at a Lower Value than Pressure on the through Line. A Higher Pressure at the Diode Branch Closes the Diode and Allows Normal Operation in the through Line. Air can Flow out of the Bottom of the Tee causing a Slight Reverse Flow. This Tee is not Designed for Systems where the Reverse Flow through the Restrictor can be Trapped Between a Shut-off Device and an Actuator. The R-3714 is Designed for Inline Installation using 1/4" OD Flexible Tubing