A barbed fitting with a three-sixteenths inch inside diameter hose and one-eighth inch national pipe thread male connection threads into a thirteen-thirty-seconds inch diameter hole in the duct wall. The pressure port is assembled tool-tight and sealed around the barbed fitting with room temperature vulcanizing silicone sealant.
DUCT WALL ⌀ 13/32" HOLE BARBED FITTING: 3/16" ID HOSE X 1/8" NPT/M (AFTER PRESSURE PORT IS ASSEMBLED TOOL-TIGHT, SEAL AROUND BARBED FITTING WITH RTV SILICON SEALANT)
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