Schier GB-500-500HF User manual

Contents
Special Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Getting to Know the GB-500-500HF . . . . . . . . . . . . . . . . . . . . . . . . .3
Buried Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6
On the Floor Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-8
Installation Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Part #: 4075-XXX-01
INSTALLATION GUIDE
GB-500-500HF 500 GPM Grease Interceptor for
Indoor/Outdoor Installation

Page 2 of 9
GB-500-500HF Installation Guide
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
for guidance. For detailed
guidance on indirect connections, go to:
webtools.schierproducts.com/Technical_Data/Indirect_Connections.pdf
Fernco or similar
rubber flow
restriction end cap
SPECIAL PRECAUTIONS
For 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. 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.
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.
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.
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 fittings.
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).
pipe supports
InterceptorInterceptor
concrete slab subject to hydrostatic pressure
watertight
concrete
vault
InterceptorInterceptor
concrete floor
suspended installation
InterceptorInterceptor
max water table height
for direct burial
deadman anchor
nylon strap
turnbuckle
InterceptorInterceptor
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.
installation
instructions
AGS2
Above Grade Installation Support
(for Model GB-500 Only)
The wet weight of the interceptor combined
with high temperature kitchen water
creates the potential for tank deformation
when installed above grade. Model GB-500
installed above grade must be installed
with Above Grade Support Kit model AGS2
to maintain structural integrity
DO NOT
COMPACT
BACKFILL
DO NOT AIR TEST UNIT OR RISER SYSTEM!

GETTING TO KNOW THE GB-500-500HF
1. Pickable Cast Iron Cover (standard)
2. Cover Gasket
3. Safety Star (x2)
4. Safety Star Tether (x2)
5. Cover Adapter (x2)
6. Cover Adapter Gasket
Assembly(x2) with Upper and
Lower Stainless Steel Band Clamps
7. Inlet Diffuser
8. Inlet Bulkhead Connection
(standard) 6" Plain End
9. Composite Cover Bolts
and Washers (x8)
10. Bolted Composite Cover (optional)
11. Air Relief/Visual Access
12. Outlet Diffuser
13. Outlet Bulkhead Connection
(standard) 6" Plain End
14. 7/16" Nut Driver Bit
1 9
10
2
3
4
11
5
12
13
6
2
3
5
7
8
6
14
4
Page 3 of 9
GB-500-500HF Installation Guide

Special Precautions
BURIED INSTALLATION
1a 1b
1c
Leak?
Call customer care at 913-951-3300
8a – 5p M – F CST
1Test tank for water tightness
Fill Line
Cap inlet and outlet Remove covers. For base unit testing fill with water to
just above the highest connection.
Inspect unit, connections and gaskets for leaks. Check
water level at specific time intervals per local code.
Max Water Level
Risers are not designed
to retain water
5
3 Risers (94") Max
4
InterceptorInterceptor
Install interceptor as
close as possible to
fixtures being served
1 3
Provide at least 16"
clearance above unit for
routine maintenance.
2
16" min.
Page 4 of 9
GB-500-500HF Installation Guide
ODOR ALERT!
Interceptor is not a
sewer gas trap.
All upstream fixtures
must be trapped
InterceptorInterceptor

Excavate hole at least 18" larger than interceptor on
all sides and 12" 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.
2a 2b
12" or more
18" 18"
12"
2 Excavate Burial Pit
BURIED INSTALLATION
Page 5 of 9
GB-500-500HF Installation Guide
4 Wet or Air Test Piping Per Local Code
Doing so may result in property damage, personal injury or death.
DO NOT AIR TEST UNIT OR RISER SYSTEM!
1Leak? Call customer care at
913-951-3300
8a – 5p M – F CST
3 Connect Piping
Lower unit into pit 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.
Outlet
Connection
2-Way
Cleanout Tee
Inlet
Connection

BURIED INSTALLATION
Page 6 of 9
GB-500-500HF Installation Guide
5 Bring Covers Flush-to-Grade
The GB-500-500HF is ready for burial depth of 49-1/2" from finished grade to bottom of tank (or 10-1/2" to centerline of inlet).
Deeper burials will require extending the Cover Adapters and possibly adding risers.
Measure dimension X to determine riser height needed.
5a
Install risers if required
(see instructions included with FCR2).
5b
Riser Height Risers
Needed Required
0" - 4" None (use adapter)
>4" - 34" FCR2 (x2)
>34" - 64" FCR2 (x4)
>64" - 94" FCR2 (x6)
If required, Cover Adapters
may now be tilted up to
10º in any direction using
gasket flexibility.
5f
Adjust Cover Adapter
heights as needed.
Maintain a minimum
2-1/2" insertion depth.
2-1
/
2" minimum
5d
Loosen the
Cover Adapter Upper
Band Clamp using 7/16"
Nut Driver Bit.
5c
Tighten Upper
Band Clamp to 5 -8 ft.
lbs. of torque using 7/16"
Nut Driver Bit.
5e
6 Backfill and Finished Grade
Fill unit with water for stabilization
and float-out prevention.
6a 6a
Vehicular Traffic Areas:
Minimum 8" thick concrete slab with rebar required.
Thickness of concrete around covers 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.
Pedestrian Traffic or Greenspace Areas:
Minimum 4" thick concrete slab with rebar required.
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.
TOP VIEW 18"
min
45º
18"
min
18"
min
18"
min
Concrete Slab
Rebar
Pour concrete slab to finished grade.
6c
6c1
Rebar

Special Precautions
ODOR ALERT!
Do not install air
gap on outlet side
of interceptor.
1Install interceptor as close as
possible to fixtures being served
3
Provide at least 16"
clearance above unit for
routine maintenance.
16" min.
4
ON THE FLOOR INSTALLATION
ODOR ALERT!
Interceptor is not a sewer gas trap.
All upstream fixtures must be trapped
2
1a 1b
1c
Leak?
Call customer care at 913-951-3300
8a – 5p M – F CST
1Test tank for water tightness
Fill Line
Cap inlet and outlet Remove covers. For base unit testing fill with water to
just above the highest connection.
Inspect unit, connections and gaskets for leaks. Check
water level at specific time intervals per local code.
Page 7 of 9
GB-500-500HF Installation Guide

Floor Below Installation Detail
3 Install AGS2 Above Grade Support Kit (sold separately)
ON THE FLOOR INSTALLATION
Mechanically couple inlet and outlet drainage lines
to unit. Do not solvent weld. Ensure all upstream
fixtures are trapped. Vent per local code.
4 Wet or Air Test Piping Per Local Code
Doing so may result in property damage, personal injury or death.
DO NOT AIR TEST UNIT OR RISER SYSTEM!
1Leak? Call customer care at
913-951-3300
8a – 5p M – F CST
The wet weight of the interceptor combined
with high temperature kitchen water
creates the potential for tank deformation
when installed above grade. Model GB-500
installed above grade must be installed
with Above Grade Support Kit model AGS2
to maintain structural integrity. Refer to
installation instructions included with AGS2.
Above Grade Support Kit - AGS2
2 Connect Piping
InterceptorInterceptor
vent per
local code
flexible PVC
couplings
Page 8 of 9
GB-500-500HF Installation Guide

deadmen anchors (by others)
INSTALLATION OPTIONS
1 High Water Table Installations, See Anchor Kit Model AK2
Page 9 of 9
GB-500-500HF Installation Guide
Deadmen Anchoring:
If the installation location is in a high
water table area or at risk are (including
but not limited to tidal surge areas,
floodplains and areas that receive storm
water) the GB-500-500HF must be
secured to concrete deadmen anchors
(by others) using Schier model AK2
anchor kit.