Schier BigFoot GGI-750 Instruction manual

SUBMITTAL
TeleGlide Risers
SR24 (x2) 5" – 23"
LR24 (x2) >23" – 38"
SR24 (x4) >38" – 43"
SR24 (x2) + LR24 (x2) >43" – 58"
LR24 (x4) >58" – 72"
APPROVAL:
This product is made-to-order and is not returnable.
This product is for below grade installations only.
Signature:
Date:
Company:
Specifying Engineer:
Engineering Firm:
page 1 of 5
OPTIONS:
H20 Load Rated Pickable
Cast Iron Covers
4" Plain End Inlet/Outlet
4" Male Thread Inlet/Outlet
6" Male Thread Inlet/Outlet
20"
(50.8 cm)
56½"
(143.5 cm)
76½"
(194.3 cm)
67½"
(171.5 cm)
75"
(94.0 cm)
19 ½ "
(49.5 cm)
5
7 "
(144.8 cm)
76
½ "
(194.3 cm)
68"
(172.7 cm)
81"
(205.7 cm)
GGI-750
Submittal | Special Precautions | Specifications | Installation
Gravity Grease Interceptor Technical Data
20"
(50.8 cm)
56½"
(143.5 cm)
21 ½ "
(54.6 cm)
5
5 "
(139.7 cm)
STANDARD: 6" plain end inlet/outlet | Capacities - Liquid: 750 gal.(2,839 L); Grease (Factory Rating): 5,336 lbs. (2,420.4 kg)@ 100 GPM /
3,628 lbs. (1,645.6 kg)@ 200 GPM; Solids: 75 gal. (284 L) | Highway traffic load rated, bolted, gas/water tight composite covers. (16,000 lbs.)
057-0880-03
9500 Woodend Road | Edwardsville, KS 66111 | Tel: [phone] | Fax: [phone] | www.schierproducts.com © Copyright 2019 Schier, All Rights Reserved
MODEL NUMBER:
GGI-750
DESCRIPTION: Polyethylene Gravity Grease Interceptor
100/200 GPM - 750 gallon capacity
PART #: 4350-001-04 DWG BY: B. Karrer DATE: 4/10/2019 REV: 5 11/8/2018 ECO:

page 2 of 5
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 150º F), a
drain water tempering valve (DTV) and approved backflow prevention assembly
must be installed. Most state and local plumbing codes prohibit water above
150º F being discharged into the sanitary sewer. Water above 150º 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 ( > 150º F)
approved backflow prevention assembly
DTV (drain water tempering valve)
directly connected indirectly connected
Interceptor
Interceptor
Interceptor
installation
instructions
057-0880-03
9500 Woodend Road | Edwardsville, KS 66111 | Tel: [phone] | Fax: [phone] | www.schierproducts.com © Copyright 2019 Schier, All Rights Reserved
MODEL NUMBER:
GGI-750
DESCRIPTION: Polyethylene Gravity Grease Interceptor
100/200 GPM - 750 gallon capacity
PART #: 4350-001-04 DWG BY: B. Karrer DATE: 4/10/2019 REV: 5 11/8/2018 ECO:

OUTLET END VIEW
SECTION A-A
TOP VIEW
SPECIFICATIONS
page 3 of 5
AA
Engineered inlet and outlet
diffuser with inspection ports
Baffle with
flow holes
67-1/2" Inside
81"
19-1/2"
57"
55"
12" 12"
76-1/2"
Reinforced
end walls
C
Lof 6" inlet
C
Lof 6" outlet
ø 24-1/2"
ø 66" Inside
ø 68"
21" 21"39"
Adapters with up to
3-1/2" of adjustability
Highway traffic load rated,
bolted, gas/water tight
composite covers.
(16,000 lbs.).
NOTES
1. 6" plain end SCH. 40 inlet/outlet
2. Unit weight - w/composite covers: 1,200 lbs.; w/cast
iron covers: 1,360 lbs.
3. Maximum operating temperature: 140º F continuous
4. Capacities
Liquid: 750 gal.;
Grease (Factory Rating):
5,336 lbs. @ 100 GPM / 3,628 lbs. @ 200 GPM;
Solids: 75 gal.
ENGINEER SPECIFICATION GUIDE
Schier Big Foot ™ grease interceptor model # GGI-750 shall be
lifetime guaranteed and made in USA of seamless, molded
polyethylene with minimum 3/4" uniform wall thickness.
Interceptor shall be furnished for below grade installation
with field adjustable riser system. Interceptor flow rate shall
be 100 or 200 GPM. Interceptor grease capacity shall be
5,336 lbs. @ 100 GPM or 3,628 lbs. @ 200 GPM. Cover shall
provide water/gas-tight seal and have minimum 16,000 lbs.
load capacity.
057-0880-03
9500 Woodend Road | Edwardsville, KS 66111 | Tel: [phone] | Fax: [phone] | www.schierproducts.com © Copyright 2019 Schier, All Rights Reserved
MODEL NUMBER:
GGI-750
DESCRIPTION: Polyethylene Gravity Grease Interceptor
100/200 GPM - 750 gallon capacity
PART #: 4350-001-04 DWG BY: B. Karrer DATE: 4/10/2019 REV: 5 11/8/2018 ECO:

SIDE VIEW DETAIL
EXCAVATION AND BACKFILL DETAIL
Finished grade 4"
8"
TOP VIEW
ELEVATION VIEW
CONCRETE SLAB DETAIL
Rebar
18" 18"
18"
45º
18"
Rebar
Concrete Slab
INSTALLATION (1 of 2)
page 4 of 5
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!
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 81" 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.
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 support-
ed 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 GGI 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. Measure the width and length of the tank and excavate a hole that is a minimum of
4. After the excavation is complete create a well compacted support layer of sand/-
gravel mixture so that ground supporting tank is a minimum of 12" above native soil.
UNIT INSTALLATION
1. Lower and center the unit into hole using straps around unit. Do not use chains or
accessways to move the unit.
2. Ensure the unit tops are level with finished grade.
3. All pipe penetrations to be sleeved or have slip connections.
4. For units with cast iron covers, remove retainer clips prior to burial.
5. Fill unit with water before backfilling to stabilize unit and prevent float-out during
backfilling.
BACKFILLING AND FINISHED CONCRETE SLAB
1. Before backfilling and pouring of slab, secure covers and risers (if necessary) to the
unit.
2. Backfill evenly around tank using crushed aggregate (approximately 3/4" size rock
or sand, with no fines), or flowable fill. Work backfill under the unit using a probe to
ensure the unit is fully supported.
3. 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. Slab must
extend 18" outside the unit footprint.
5. 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
BELOW GRADE INSTALLATION ONLY! DO NOT INSTALL
ABOVE GRADE!
Risers
Nylon
strapping
Turnbuckles
Optional deadman anchor
057-0880-03
Native soil
12" Sand/gravel
Finished grade
Riser
Crushed gravel
or sand
Turnbuckle
Optional
deadman anchor
9500 Woodend Road | Edwardsville, KS 66111 | Tel: [phone] | Fax: [phone] | www.schierproducts.com © Copyright 2019 Schier, All Rights Reserved
MODEL NUMBER:
GGI-750
DESCRIPTION: Polyethylene Gravity Grease Interceptor
100/200 GPM - 750 gallon capacity
PART #: 4350-001-04 DWG BY: B. Karrer DATE: 4/10/2019 REV: 5 11/8/2018 ECO:

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.
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
2-1/2" Minimum Insertion Depth
4" Maximum Insertion Depth
(into GB unit only)
INSTALLATION (2 of 2)
page 5 of 5
057-0880-03
9500 Woodend Road | Edwardsville, KS 66111 | Tel: [phone] | Fax: [phone] | www.schierproducts.com © Copyright 2019 Schier, All Rights Reserved
MODEL NUMBER:
GGI-750
DESCRIPTION: Polyethylene Gravity Grease Interceptor
100/200 GPM - 750 gallon capacity
PART #: 4350-001-04 DWG BY: B. Karrer DATE: 4/10/2019 REV: 5 11/8/2018 ECO: