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INSTALLATION GUIDE
GB-75-B
Contents
Special Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Getting to Know the GB-75-B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-10
Part #: 4045-042-01
Find these instructions online at: schierproducts.com/gb-75-b
50 GPM 99% Efficient Great Basin
Grease Interceptor
Indoor/Outdoor
™
913-951-3300 | schierproducts.com
© Copyright 2020 Schier Products Company, 09/14/2020
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Summary of Contents for Schier GB-75-B
- Page 1 Special Precautions ........2-3 Getting to Know the GB-75-B ......4 Installation .
- Page 2 SPECIAL PRECAUTIONS For Schier Grease Interceptor Installations - Failure to follow this guidance voids your warranty DO NOT AIR TEST UNIT OR RISER SYSTEM! Do not install this unit in any manner except as described in these instructions. Doing so may result in property damage, personal injury or death.
- Page 3 SPECIAL PRECAUTIONS For Schier Grease Interceptor Installations - Failure to follow this guidance voids your warranty Secure Cover Adapters Below Grade Installation Slab Requirements Cover adapters must be secured A concrete slab to finished grade with rebar is required when installing to base units in above grade interceptor below grade.
- Page 4 GETTING TO KNOW THE GB-75-B Inlet diffuser cover (white) Pickable cast iron cover (standard) 10. 4" cleanout plug (x2) 19. Outlet diffuser retaining nut 2. Cover gasket 11. Outlet bulkhead connection 20. Outlet diffuser (optional) 4" FPT (x2) 3. Safety Star® access restrictor 21.
- Page 5 Excavate hole at least 12" larger than interceptor on all sides and 6" deeper than tank bottom. Lay a level bed of well-packed, crushed aggregate (approximately 3/4" size rock or sand, with no fines) in the base of hole. Schier | GB-75-B Installation Guide page 5 of 10...
- Page 6 Cap unused connections(all configurations) Screw in provided 4" cleanout plugs using pipe thread sealant or tape approved for use with plastics. Do not cap the inlet or outlet connections attached to the diffusers. page 6 of 10 Schier | GB-75-B Installation Guide...
- Page 7 Before risers have been installed, cut pipe to length and attach to top of cover using PVC primer/cement. Extension handle length should be about 12" shorter than total riser height. Schier | GB-75-B Installation Guide page 7 of 10...
- Page 8 Place unit into final position and set level. Mechanically couple inlet and outlet drainage lines to unit. Do not solvent weld. Ensure all upstream fixtures are trapped. Vent per local code. Installation of 2-way cleanout tees to grade (by others) is recommended for buried installations. page 8 of 10 Schier | GB-75-B Installation Guide...
- Page 9 Hours 8am-5pm CST, M-F Bring Covers Flush-to-Grade The GB-75-B is ready for burial depth of 40" from finished grade to bottom of tank (or 13-1/2" to centerline of inlet). Deeper burials will require extending the cover adapters and possibly adding risers.
- Page 10 (including but not limited to tidal surge areas, floodplains and areas that receive storm water) the GB-75-B must be installed with Schier model AK1 anchor kit. Model AK1 anchor kit Backfill and Finished Grade...
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