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CapSpray Needle Packing(Sold in Single Qty)
If material leaks from around or through the packing nut, readjust the packing nut.
Once you have adjusted the nut, reconnect the air hose and the cup assembly. Squeeze the trigger to see if the leaking has stopped. If it has not, make sure the packing nut is a tight as possible, while allowing the needle to move freely. If adjusting the packing nut does not sop the leak, replace the packing.