Installation Guide - ProSTEP Effluent Pump Packages

14Installation Manual: ProSTEP Effluent Pump PackagesAppendix 1: Grommet Installation InstructionsOrenco offers hole saws with pocket cutters in several sizes thatmake cutting grommet holes simple and easy. These RKHS holesaws cut away the ribs as the hole is cut, eliminating the need tonotch and break the riser ribs with an angle grinder and chisel.• RKHS100 for 1-inch grommets• RKHS125 for 1¼-inch grommets• RKHS150 for 1½-inch grommets• RKHS200 for 2-inch grommetsStep 1: To install grommets in the field, first mark the riser forlocation of the grommets. (For Perma-Loc risers, you shouldtry to avoid cutting through the pipe seam — the extra thick rib— unless it is unavoidable.)Grommet Hole Saw Sizing ChartGrommet Size (in.) Hole Size (in.) NOTE:½ 1 Grommet size = nominal¾1¼ (IPS) pipe size. For moreinformation about grommet1 1 9 ⁄16dimensions and actual pipe1¼1¾ O.D., see Orenco’s GrommetTechnical Data Sheet1½ 2 1 ⁄82 2¾ (NTD-RLA-PG-1), available3 3 from the Document Library7 ⁄8at www.orenco.com.4 5Step 2: Using the correctly-sized RKHS hole saw and a drill ofat least 18 volts, cut the hole and grind the ribs down until youhave a flat, smooth surface for installing your grommet. Donot grind too deeply into the riser — about 1 ⁄16 inch (1.6 mm) issufficient.Step 3: Use a wire brush to clean up the cut, then a deburringtool or knife to deburr the edges of the opening, being careful notto enlarge the opening.Step 4: Install the grommet in the riser. Apply a bead ofADH100 adhesive to the groove of the grommet prior to insertioninto the riser hole. This will make the grommet more secureand will overcome any imperfections in the drilled hole.12234Grommet (at 12 o’clock)Splice boxDischargeassemblyGrommet(at 3 o’clock)Support pipesBiotube pump vaultNIM-EPS-1Rev 2.4, 02/13© 2013 Orenco Systems ® Inc.