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Schier GB-250-B Installation Manual

75 gpm 99% efficient great basin indoor/outdoor grease interceptor
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INSTALLATION GUIDE
GB-250-B
Contents
Special Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Series Installations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Getting to Know the GB-250-B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-12
75 GPM 99% E cient Great Basin
Interceptor
Indoor/Outdoor Grease
™
LIFETIME GUARANTEED GREASE INTERCEPTORS
© Copyright 2022 Schier Products Company, 11/21/22
913-951-3300 | schierproducts.com

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Summary of Contents for Schier GB-250-B

  • Page 1 Series Installations ......... . .3 Getting to Know the GB-250-B ....... .4 Installation .

  • 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-B

    GETTING TO KNOW THE GB-250-B Inlet di user cover (white) Pickable cast iron cover (standard) 10. 4" cleanout plug (x4) 19. Bolted composite cover (optional) 2. Cover gasket 11. Inlet di user cover (white) 20. Air relief/visual access 3. Safety Star® access restrictor (x2) 12.
  • 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 12 Schier | GB-250-B Installation Guide...
  • Page 6 Rotate di user toward chosen inlet and replace foot, ensure it points toward unit front wall. Hand tighten foot retaining nut. Insert di user into chosen inlet and hand tighten retaining nut. page 6 of 12 Schier | GB-250-B Installation Guide...
  • Page 7 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 7 of 12 Schier | GB-250-B Installation Guide...
  • Page 8 Finished installation using PVC primer/cement. showing optional Extension handle length should be extension handle about 12" shorter than total riser height. page 8 of 12 Schier | GB-250-B Installation Guide...

  • Page 9: 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 9 of 12 Schier | GB-250-B Installation Guide...
  • Page 10 Cover adapters must be secured to base units in above grade installations with increased head pressure conditions. Model GB-250-B uses (2) cover adapter tie-down kits model ATD1 (sold separately). Wet or Air Test Piping Per Local Code Have a Leak?
  • Page 11 Bring Covers Flush-to-Grade The GB-250-B 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 12 (including but not limited to tidal surge areas, floodplains and areas that receive storm water) the GB-250-B must be installed with Schier model AK1 anchor kit. Model AK1 anchor kit Backfill and Finished Grade Backfill...