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The LSB400 has a very large barb to allow for a higher flow of water. The barb is too big to fit into 1/2" tubing and can only be used with 3/4" or larger tubing or 1" or larger rigid pipe.
Use the PU400NEW punch to make the proper size hole for the large barb on this fitting.
This fitting allows a flow of 160 GPH at 10 PSI.
If installing into PVC pipe or rigid poly tubing the .400" Grommet (GROM) must also be used. Drill a 9/16" hole in 1" or larger pipe, insert the grommet into the hole then insert the fitting into the grommet.