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INSTALLATION GUIDE
GB-250
100/200 GPM Great Basin
Indoor/Outdoor Grease Interceptor
™
Contents
Special Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Series Installations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Getting to Know the GB-250 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-11
LIFETIME GUARANTEED GREASE INTERCEPTORS
913-951-3300 | schierproducts.com
© Copyright 2023 Schier Products Company, 01/01/23
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Summary of Contents for Schier GB-250
- Page 1 Series Installations ......... . .3 Getting to Know the GB-250 ........4 Installation .
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Page 2: Special Precautions
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: Series Installations
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 to A concrete slab to finished grade with rebar is required when installing base units in above grade installations interceptor below grade. -
Page 4: Getting To Know The Gb-250
GETTING TO KNOW THE GB-250 200 GPM flow control cartridge (red) Inlet di user cover (white) Pickable cast iron cover (standard) 9. Inlet di user 18. Bolted composite cover (optional) 2. Cover gasket 10. Inlet di user retaining nut 19. Air relief/visual access 3. - 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. page 5 of 11 Schier | GB-250 Installation Guide...
- 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 di users. page 6 of 11 Schier | GB-250 Installation Guide...
- Page 7 Finished installation length and attach to top of cover using showing optional extension handle PVC primer/cement. Extension handle length should be about 12" shorter than total riser height. page 7 of 11 Schier | GB-250 Installation Guide...
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Page 8: Installation
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 11 Schier | GB-250 Installation Guide... - Page 9 In these situations Above Grade Support Kit model AGS1 is required to be installed to maintain GB-250 structural integrity. Wet or Air Test Piping Per Local Code Have a Leak?
- Page 10 Bring Covers Flush-to-Grade The GB-250 is ready for burial depth of 44" 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. Measure dimension X to determine riser height needed.
- Page 11 (including but not limited to tidal surge areas, floodplains and areas that receive storm water) the GB-250 must be installed with Schier model AK1 anchor kit. Model AK1 anchor kit Backfill and Finished Grade Backfill...
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