Schier GB-1000 User manual

INSTALLATION GUIDE
Model #GB-1000 100 GPM Grease Interceptor
For Outdoor Use
Contents
Special Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
General Installation Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Field Cut Riser Installation Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Expanding Grease Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Part #: 057-0890-03
Find these instructions online at: schierproducts.com/pages/gb-1000

page 2 of 4
When Installing Interceptor Inside
If your dishwashing
sink(s) discharges
into a floor drain/
sink (drain), you
must regulate the
flow into the drain
to avoid an overflow
of water onto the
kitchen floor. This
can be done by
installing a valve or
flow restriction cap
on the sink piping that discharges into the drain. See drawing above for
guidance. For detailed guidance on indirect connections, go to:
hp://webtools.schierproducts.com/Technical_Data/Indirect_Connections.pdf
SPECIAL PRECAUTIONS
For All Schier Grease Interceptor Installations - Failure to follow this guidance voids your warranty
High Water Table Installations
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.
Models GB-50, GB-75, and GB-250 that are direct buried in high water
table scenarios must be installed with model AK1 anchor kit.
Interceptor
Interceptor
Interceptor
max water table
height for direct burial
model AK1 anchor kit
Fully Support
Base of Unit
Install unit on solid, level surface in
contact with the entire footprint of
unit base; for suspended installations
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
Installation Instructions
Installation instructions and additional
components are included with the
interceptor. Read all instructions prior
to installation. This interceptor is
intended to be installed by a licensed
plumber in conformance with all
local codes.
Interceptor
Interceptor
Interceptor
concrete floor
suspended installation
Fernco or similar
rubber flow
restriction end cap
Hydrostatic Slabs
(or Pressure Slabs)
When installed under a hydrostatic
slab (slab designed to withstand
upward lift, usually caused by
hydrostatic pressure) interceptor
must be enclosed in a watertight
concrete vault.
Interceptor
Interceptor
Interceptor
concrete slab subject
to hydrostatic pressure
watertight concrete vault
Support Inlet and
Outlet Piping
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 fiings.
Interceptor
Interceptor
Interceptor
pipe supports
High Temperature Kitchen Water
If water is entering the interceptor at excessive temperature (over 140º F), a
drain water tempering valve (DTV) and approved backflow prevention assembly
must be installed. Most state and local plumbing codes prohibit water above
140º F being discharged into the sanitary sewer. Water above 140º F will weaken
or deform PVC Schedule 40 pipe, poly drainage fixtures like interceptors and
erode the coating of cast iron (leading to eventual failure).
Interceptor
Interceptor
Interceptor
cold water supply line
high temperature effluent ( > 140º F)
approved backflow prevention assembly
DTV (drain water tempering valve)
directly connected indirectly connected
Interceptor
Interceptor
Interceptor
installation
instructions
057-0890-03

page 3 of 4
LEAK/SEAL TESTING
Cap/plug all base unit plumbing connections and remove covers. For base unit testing, fill with
water to just above the highest connection. For riser system testing (if required) fill with water
to finished grade level. CAUTION: Risers must be supported before filling with water to
prevent tipping. Inspect unit, connections and all gaskets and clamps (if applicable) for leaks.
Check water level at specific time intervals per local code. NOTE: All GB series tanks have
been wet tested for leaks prior to shipment from the factory.
EXCAVATION
1. Install unit as close as possible to fixtures being served.
2. Surrounding soil must be undisturbed soil or well compacted engineering fill.
3. Width and length of excavation shall be a minimum of 18" greater than the tank on all sides
and depth shall be 12" deeper than tank boom.
4. Set the tank level on a 12" deep layer of well-packed crushed aggregate material and
connect waste piping per General Installation Instructions.
INSTALLATION
Schier grease interceptors are manufactured with an internal flow
control system. They do not require an external flow control system or
air intake vent. Schier grease interceptors are not to be installed in any
other manner except as shown. Consult local codes for separate trapping
requirements, cleanout locations and additional installation instructions.
1. The flow control plate is not pre-installed on this unit and is
provided in a bag fastened to the neck of the unit. When the unit is
installed 13 feet or more below the fixtures being served, or a high
flow/increased head pressure condition exists (causing a flow rate
above 100 GPM), install the inlet diffuser flow control plate to
maintain proper flow rate.
2. Lower and center the unit into hole using straps around unit. Do not
use chains or accessways to move the unit. Ensure the unit tops are
level with finished grade.
3. Connect inlet and outlet drainage lines to unit. Mechanically couple
pipes to unit. Do not solvent weld.
4. Secure covers and risers (if necessary) to the unit. For unit with cast
iron covers, remove retainer clips prior to burial.
NOTE: Do not install below a hydrostatic slab.
BACKFILL
1. Preparation of sub grade per geotech recommendations.
2. Stabilize and compact sub grade to 95% proctor.
3. Fill unit with water before backfilling to stabilize unit and prevent float-out during backfilling.
Secure covers and risers (if necessary) to the unit.
4. Backfill evenly around tank using crushed aggregate (approximately 3/4" size rock or sand,
with no fines), or flowable fill. Do not compact backfill around unit. Work backfill under
the unit using a probe to ensure the unit is fully supported.
FINISHED CONCRETE SLAB
Slab must extend 18" minimum outside the footprint of the unit.
Pedestrian traffic or greenspace areas: 4" Thick reinforced concrete slab required.
Vehicular traffic areas: Minimum 8" Thick concrete slab with rebar required. Thickness of
concrete around cover to be determined by specifying engineer. If traffic loading is required the
concrete slab dimensions shown are for guideline purposes only. Concrete to be 28 day
compressive strength to 4,000 PSI. Use NO. 4 rebar (ø 1/2") grade 60 steel per ASTM A615:
connected with tie wire. Rebar to be 2-1/2" from edge of concrete and spaced in a 12" grid with 4"
spacing around access openings.
DEADMEN ANCHORING:
1. Deadmen anchors (by others) for high water table installation should be constructed
according to the American Concrete Institute (ACI) code at a size of 12" W x 12" H x 90" L.
2. Deadmen should have 3 anchor points with corrosion resistant turnbuckles (by others)
rated for a minimum load capacity of 7,500 lbs.
3. Lay the deadmen parallel with the unit and ensure that it is outside the shadow of the tank.
4. Connect nylon strapping (by others) to each anchor point. Nylon straps must have a
minimum load capacity of 7,500 lbs.
WARNING! DO NOT AIR TEST UNIT OR FIELD CUT RISER SYSTEM!
DOING SO MAY RESULT IN PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.
BELOW GRADE INSTALLATION ONLY! DO NOT INSTALL ABOVE GRADE!
Finished grade 4"
8"
TOP VIEW
ELEVATION VIEW
Rebar
18" 18"
18"
45º
18"
Rebar
Concrete Slab
CONCRETE SLAB DETAIL
FLOW CONTROL
PLATE DETAIL
Flow
control
plate
SIDE VIEW DETAIL
Risers
Nylon
strapping
Turnbuckles
Optional deadman anchor
Native soil
12" Sand/gravel
Finished grade
Riser
Crushed gravel
or sand
Turnbuckle
Optional
deadman anchor
EXCAVATION AND BACKFILL DETAIL
057-0890-03
INSTALLATION (1 of 2)

Rated Grease Capacites for
GB-1000 Units Piped in Series
No. of Units Removal Efficiency
in Series 98.8% 99%*
2 13,094 lbs. 12,474 lbs.
3 19,641 lbs. 18,711 lbs.
4 26,188 lbs. 24,948 lbs
FIELD CUT RISER (24 SERIES)
INSTALLATION GUIDELINES
Tools needed: 7/16" Nut driver tool/bit (included), marker (included), tape
measure and drill with 1/2" chuck. Jigsaw, circular saw or reciprocating
saw will be needed if risers need to be cut.
NOTE: To remove a component or adjust its position, the Upper Band
Clamp needs to be loosened or removed using nut driver bit. The
Lower Band Clamp is factory set and should not be removed. For
proper fastening ensure clamps are tightened to 5 - 8 ft lbs. of torque
(same as a rubber no-hub coupling) prior to installation.
Riser Assembly Instructions/Steps
1. Set unit so the pipe connections line up with job site piping and
measure riser height needed from top of cover to finished grade.
See Table 1 to select risers needed.
2. Remove covers from adapters. Remove adapters from main unit. On
a level surface, pre-assemble the risers and adapters, adjusting the
components upwards or downwards to achieve the riser height
needed. Make sure to maintain minimum and maximum insertion
depths as shown in Figure 2. If components are too long, make a
circular line around the sidewall with marker and cut with a power
saw. The lowest cut line on the riser assembly will be 6" beyond the
riser height needed to allow for ideal insertion depth (See Figure 1).
An alignment mark should be drawn 2" beyond the riser height
needed which will align with the top of the base unit gasket. DO NOT
cut the alignment mark. The Adapters and risers should sit level with
each other. Tighten upper clamps to keep riser/adapter assembly
from shifting. Make alignment marks on the sidewalls at the top of all
riser gaskets to aid final assembly.
3. IMPORTANT: Before the next step, make sure both diffusers are
installed inside the main unit at the appropriate locations. Check if
there needs to be any flow control adjustment at the inlet diffuser
(see general installation instructions).
4. Take apart riser assembly and clean all sidewalls and insides of
gaskets to remove dust/debris. Install components into the main
units starting from the lowest riser and work your way up to finished
grade. Ensure that riser will not interfere with diffuser, allow min. 1"
clearance. Maintain minimum and maximum insertion depths for all
components (see Figure 2). Tighten Upper Clamps to specified
torque after correctly positioning components. Riser assembly may
need to be supported during backfill.
5. If tilting of the adapter is required to be flush with grade, do so
AFTER all clamps have been tightened with riser(s)/adapter in a
vertical and level position. Tilting is done using gasket flexibility.
Tilting before tightening clamps may ruin a perfect gasket seal.
Schier recommends tilting only the adapter versus the entire
riser assembly to make sure your riser height and proper tank
access is maintained.
6. If riser height conditions change after completing above steps,
there may be room for adjustment. As long as minimum and
maximum insertion depths are maintained (see Figure 2), the
adapters/risers can be adjusted/cut as many times as neces-
sary.When riser system installation is complete, see Leak/Seal
Testing procedure if required.
SERIES INSTALLATION OF
MULTIPLE GREASE INTERCEPTORS
For lower flow rates and higher grease storage requirements.
For below grade installations it is recommended to install a two-way
cleanout tee extended to finished grade before the inlet of the first
unit, after the outlet of the last unit and in between units (if there is a
long run of pipe between units) for line cleaning purposes.
NOTE: When the flow control plate is required, it should only be
installed on the first unit in the series.
Units piped in series are certified to ASME A112.14.3
(Type C) and CSA B481.1 and include an internal flow
control. External flow control with vent not required.
Top View of 4 GB-1000
Units Piped in Series
Table 1
Riser Height Needed Risers Required
0 - 3-1/2" None (use adapter)
5" - 23" SR24 (x2)
>23" - 38" LR24 (x2)
>38" - 43" SR24 (x4)
>43" - 58" SR24 (x2) + LR24 (x2)
>58" - 72" LR24 (x4)
Riser
Height
Needed
Adapter
Riser
Cut Line
Alignment Mark
Figure 1 - Riser Measurements
Field Cut Riser
Components
6"
2"
4"
LR24
Long Riser
Adapter
SR24
Short Riser
Adapter (shown)
or Riser
Cover
Gasket
Upper Band Clamp
(
field adjustable)
Lower Band Clamp
(
factory set - do not
adjust or remove)
GB Unit (shown)
or Riser
Figure 2 - Insertion Depths
SERIES INSTALLATIONS
2-1/2" Minimum Insertion Depth
4" Maximum Insertion Depth
(into GB unit only)
page 4 of 4
057-0890-03
INSTALLATION (2 of 2)