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Installation Instructions for replacement <br /> or addition of PVC or FRP test ports <br /> Step 1) Remove failing fitting by using putty knife (chisel) and hammer - do not damage surround- <br /> ing sump wall. If you are adding a new port location drill a hole in the INTERIOR WALL ONLY. <br /> This will be the center point for the new port. <br /> surface after hole saw <br /> 3" Diameter sand area to cut & disc abrasion Dusting abraded area <br /> abrade wall around hole Use 1-1/4" stone grinder with shop brush <br /> to sand down interior <br /> Place fitting against wall centered on <br /> the hole and turn slowly a 1/4 turn in <br /> place. Then secure to wall and wait for <br /> Completely vacuuming out Apply adhesive to rough the Epoxy to fully cure. Pressure and <br /> hole & tapping walls to backside of fitting soap test the fitting according to sump <br /> dislodge fiberglass dust manufacturers recommendations. <br />