BPV-31 Refrigerator Tap Valve Piercing Valve Kit is fit for 1/4 inch 5/16 in
BPV-31 Refrigerator Tap Valve Kit. ❗Before piercing, clean the pipeline to prevent debris from entering the refrigerant pipeline. Testing or inflation: Remove the cover, connect the inflation hose to open the valve, and use a hex wrench to turn the valve stem counterclockwise.