SPECIAL PRECAUTIONS
Design trapeze to support the wet
weight of the unit. Do not partially
support unit or suspend unit using
metal U-channel to create a
trapeze. The wet weight of the
interceptor combined with high
temperature kitchen water creates
the potential for tank deformation in
suspended installations. In these
situations Above Grade Support Kit
model AGS1 is required to be
installed to maintain GB-250
structural integrity.
Suspended Installations
Install unit on solid, level surface in contact
with the entire footprint of unit base
Fully Support Base of Unit
For above grade installations ensure
heavy inlet and outlet piping (such as
cast iron or long runs) is properly
supported or suspended during the
entire installation process to prevent
connection failure or damage to
bulkhead fittings.
Support Inlet and Outlet Piping
pipe supports
DO NOT
COMPACT
BACKFILL
For Schier Grease Interceptor Installations - Failure to follow this guidance
voids your warranty
Interceptors and risers are not
designed to withstand water table
height in excess of the top of the
unit when buried (see figure). If it is
possible for this to occur, install the
interceptor and risers in a
water-tight concrete vault or
backfill with concrete or flowable
fill (wet concrete and flowable
backfill should be poured in
stages to avoid crushing the
interceptor). At risk areas include
but are not limited to tidal surge
areas, floodplains and areas that receive storm water. Great Basin™
models that are direct buried in high water table scenarios must be
installed with an anchor kit. Models GB-50, GB-75, and GB-250 use model
AK1 anchor kit. Model GB-500 uses model AK2 anchor kit for use with
deadmen anchors. Models GB-1000, GGI-750 and GGI-1500 use model
AK3 anchor kit for use with deadmen anchors.
max water table height
for direct burial
model AK1
anchor kit
High Water Table Installations
InterceptorInterceptor
AGS1
InterceptorInterceptor
concrete floor
InterceptorInterceptor
page 3 of 14
GB-250-250HF Installation Guide
