Kold-Draft GB-250 Installation Manual

GREAT BASIN GREASE INTERCEPTORS

(Models GB-15, GB-20, GB-25, GB-35, GB-50, GB-75 and GB-250)

GB-15

15 gpm, 16 gallons

Sheet Descriptions

Sheet #1 - Series overview and Warranty information
Sheet #2 - General installation guidelines and Operation/Maintenance guidelines
Sheet #3 - Below Grade installation guidelines (GB-35, GB-50, GB-75, GB-250)
Sheet #4 - Below and Above Grade installation guidelines (GB-15, GB-20, GB-25)
Sheet #5 - Multiple unit engineered grease interceptor installation guidelines
Sheet #6 - TeleGlide Riser installation guidelines (GB-35, GB-50, GB-75, GB-250)
Sheet #7 - TeleGlide Riser installation guidelines (GB-15, GB-20, GB-25)

Leak/Seal Testing
DO NOT AIR TEST UNIT OR TELEGLIDE RISER SYSTEM! Doing so may result in property damage, personal injury or death.

Base Unit: To perform a leak/seal test on the base unit, cap/plug all plumbing connections, remove the cover, and fill the unit with water just above the
highest connection. Inspect unit and connections for leaks. Check water level at specific time intervals per local code.

TeleGlide Riser System: If required by local code, the riser system may be leak/seal tested similar to the base unit. CAUTION: the riser(s) must be supported
before filling with water to keep from tipping over. Once riser system is in place and properly supported, cap/plug all plumbing connections on the main unit,
remove the cover from the top of the riser assembly and fill the unit and riser system with water to finished grade level. Carefully, as the riser(s) will be very
heavy from the weight of the water, inspect all gasket(s) and clamps (if applicable) for any leaks. Check water level at specific time intervals per local code.

Lifetime Warranty

Effective June 1, 2007 Schier Products Company (“Schier”) represents and warrants that HDPE and PP products (“Products”) will be free from any
and all defects in material and workmanship, including corrosion, during the lifetime of the plumbing system in which the Products were originally
installed and will, at its option, agree to repair, replace, or supply credit to the original purchaser.

74 lbs. grease capacity

GB-20

20 gpm, 22 gallons

109 lbs. grease capacity

GB-50

50 gpm, 52 gallons

249 lbs. grease capacity

GB-25

25 gpm, 22 gallons

75 lbs. grease capacity

75 gpm, 125 gallons

616 lbs. grease capacity

GB-35

35 gpm, 35 gallons

142 lbs. grease capacity

GB-75

This warranty does not cover damage caused by the Products’ normal usage, or wear and tear, nor does it cover damage from naturally occurring
phenomenon, including, but not limited to UV, freeze-related damage, or natural disasters. This warranty does not cover the purchaser’s cost of routine
maintenance including replacement of parts required in routine maintenance.

This warranty does not cover fabricated steel products, or any monitoring equipment. This warranty shall be effective if, and only if, the Products:
* Were installed in accordance with Schier’s notes, specifications and instructions, for installation, operation, and maintenance;
* Were installed in conformance with all applicable building and plumbing codes, and passed all applicable testing methods immediately following installation;
* Have not been subjected to misuse or abuse, whether negligent or intentional;
* Were never modified, repaired, or altered by any individual(s) not authorized by Schier.

This warranty is the purchaser’s sole and exclusive remedy, and acceptance of this exclusive remedy is a condition of the contract for thepurchase of these
Products. In no event shall Schier be liable for any incidental, special, consequential or punitive damages, or for any costs, attorney fees, expenses, losses or
delays claimed to be as a consequence of any damage to, failure of, or defect in any products including, but not limited to, any claims for loss of profi ts,
transportation, removal and installation charges. This warranty is exclusive and in lieu of all other warranties or conditions, written or oral, expressed or implied.

Certified Performance

Great Basin hydro mechanical grease interceptors are 3rd party performance-tested and listed by IAPMO to ASME #A112.14.3 grease
interceptor standard and CSA B481.1 greatly exceeding requirements for grease separation and storage. They are compliant to
the Uniform Plumbing Code and International Plumbing Code.

NOTES:

Schier grease interceptors are rated and manufactured with an internal flow control system already in
place. 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.

THE INFORMATION CONTAINED IN THIS DRAWING IS THE SOLE PROPERTY OF
PART OR AS A WHOLE WITHOUT THE WRITTEN PERMISSION OF

PROPRIETARY AND CONFIDENTIAL

SCHIER PRODUCTS

SCHIER PRODUCTS

IS PROHIBITED.

. ANY REPRODUCTION IN

DESCRIPTION:

GREAT BASIN INSTALLATION,
OPERATION AND MAINTENANCE GUIDE

SHEET NUMBER:
DWG BY:

N.EBERT

1 of 7

GB-250

100 gpm, 275 gallons

1,076 lbs. grease capacity

Schier Products

9500 Woodend Rd

Edwardsville, KS 66111

Tel: [phone]

Fax: [phone]

MATL:

03/25/2014DATE:

REV:

PE

4

www.schierproducts.com

Made in the U.S.A

GENERAL INTERCEPTOR INSTALLATION INSTRUCTIONS

(GB-250 SHOWN)

OPERATION

Schier Products offers a complete line of grease interceptor tanks to separate fats, oils, and grease waste
from the waste stream and stops it entering the public sewer system.
Influent passes through the built-in calbrated flow control, where it is diffused into the main chamber. Lighter
grease is forced upward, heavier solids are forced downward. Effluent flows through the outlet, free of
grease and food waste.

FLOW

Isometric View

Set unit on level solid surface as close as
possible to fixtures being served. If unit is
to be installed below grade refer to below
grade installation instructions. (sheet #3)

FLOW

A

C

Top View

(Inside Unit)

Connect outlet diffuser to the desired
outlet (A,B,C). Unit is shipped with outlet
diffuser in location B and sealing caps on
locations A and C.

Flow Plate

B

Top View

Connect inlet and outlet drainage lines to
unit. Mechanically couple pipes to
unit. Do not solvent weld. If connecting
multiple units for an engineered grease
interceptor system refer to multiple unit
installation sheet. (sheet #5)

Remove cover(s).1.
Remove all contents of the grease interceptor including grease, sediment and wastewater. For most 2.

thorough cleaning contact a professional pumper contractor.
To access the inlet and outlet lines for cleaning as needed:3.

a.) 4" connections: Remove the inlet and outlet diffusers (inside unit(s)) by hand loosening
green locking collars.
b.) 6" connections: Remove threaded clean-out plug from the back of the inlet and outlet diffusers.

Clean the drain lines, diffusers and air relief thoroughly of all debris before replacing diffusers to 4.
original positions or reinstalling threaded clean-out plug.

Run sinks to fill unit(s) with water.

5.
Inspect gasket for wear and tear. Replace cover(s).

6.

7.

Dispose of grease per local code.

PUMPING FREQUENCY:

MAINTENANCE

Frequency depends on the capacity of the interceptor and the amount of grease and sediment in the
wastewater.

Monitor each pumping to establish an adequate maintenance schedule based off actual kitchen variances.
Levels can be tested with core sampler. Schier Products recommends pumping frequency to exceed no more
than 90 days.

TROUBLESHOOTING TIPS:

Flow Plate

In the case of a clog, inlet and outlet diffusers may be removed for line cleaning. Slower than usual sink
drainage may indicate the need to pump/clean grease interceptor.

To maintain proper flow rate, when
interceptor is installed in a high flow or
increased head pressure application
keep calibrated flow plate installed.
Flow plate orifice calibrated to rated
flow (GPM) at 13 foot water column.

NOTES:

Schier grease interceptors are rated and manufactured with an internal flow control system already in
place. 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.

THE INFORMATION CONTAINED IN THIS DRAWING IS THE SOLE PROPERTY OF
PART OR AS A WHOLE WITHOUT THE WRITTEN PERMISSION OF

PROPRIETARY AND CONFIDENTIAL

SCHIER PRODUCTS

To maintain proper flow rate, when
interceptor is installed in a low flow or
reduced head pressure application
remove and discard calibrated flow
plate. Flow plate orifice calibrated to
rated flow (GPM) at 13 foot water
column.

DESCRIPTION:

SHEET NUMBER:

SCHIER PRODUCTS

IS PROHIBITED.

. ANY REPRODUCTION IN

DWG BY:

Always take proper care to ensure a safe and healthy environment while cleaning interceptor. For best
cleaning and maintenance service, call your local sewer and drain contractor.

Locking collar

Flow

GREAT BASIN INSTALLATION, OPERATION
AND MAINTENANCE GUIDE

N.EBERT

2 of 7

03/25/2014DATE:

MATL:
REV:

PE

4

Optional outlet

Cover

Inlet diffuser

GB-250 Shown

Schier Products

9500 Woodend Rd

Edwardsville, KS 66111

Tel: [phone]

Fax: [phone]

www.schierproducts.com

Made in the U.S.A

Adapter

Air relief
Locking collar

Flow

Outlet diffuser

Concrete Pad

must extend

18" outside

the unit footprint

2 1/2" Min.

8"

30"

45.00°

4"

Concrete Pad must extend

18" outside the unit footprint

Top View

4"

Rebar

60"

Finished Grade

INTERIOR OR EXTERIOR BELOW GRADE INSTALLATION INSTRUCTIONS

(GB-35 (INTERIOR ONLY), GB-50, GB-75, GB-250)

BELOW GRADE INSTALLATION INSTRUCTIONS

EXCAVATION

Install unit(s) as close as possible to fixtures being serviced.1.
Width and length of excavation shall be minimum 12" greater 2.
than the tank on all sides.
Depth of excavation shall be 6" deeper than tank bottom.3.
Set the tank in well-packed crushed aggregate material 4.

Rebar

GB-250
Shown

approximately 3/4" size rock, or sand, with no fines. When setting GB-75 (2),
GB-250 (2), GB-250 (3)and GB-250 (4) all units must be level.
Anchor kit is recommended for installations in high water table conditions to

5.
prevent float out. To be determined by specifying engineer. If necessary,
order optional "Anchor Kit" (see detail right).

BACKFILLING & FINISHED CONCRETE SLAB

Preparation of sub grade per geotech recommendations.1.
Stabilize and compact sub grade to 95% proctor.2.
Fill tank with water before backfilling to prevent float out during piping installation.3.
Before backfilling and pouring of slab secure cover(s) and riser/s (if necessary) to the unit(s) 4.
Backfill using crushed aggregate material approximately 3/4" size rock, or sand, 5.
with no fines.

6. Place 6" aggregate base under slab. Aggregate should be 3/4" size rock, or sand, with no fines.

7. 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.

8. Concrete to be 28 day compressive strength to 4000 PSI.

9. NO. 4 rebar (

10. Rebar to be 2 1/2" from edge of concrete.

11. Rebar spacing 12" grid. 4" spacing around access openings.

12. All pipe penetrations to be sleeved or have slip connections.

1/2") grade 60 steel per ASTM A615: connected with tie wire.

Stainless steel
anchor hook

Stainless steel
anchor strap

Stainless steel
Anchor plate

ANCHOR KIT INSTALLATION DETAIL

Stainless hardware

Clean out to grade
on inlet pipe of each
unit (by others)

Flow

Elevation View

CONCRETE SLAB DETAIL FOR TRAFFIC LOADING

(INTERIOR OR EXTERIOR)

(GB-250 Shown)

Risers to grade

Clean out to grade
on outlet pipe of each
unit (by others)

Flow

CONNECTIONS

1. Connect waste piping to the unit. When connecting GB-75 (2), GB-250 (2), GB-250 (3) and
GB-250 (4) see sheet #5 for multiple unit installation instructions.

Concrete slab

Native soil

Anchor Kit Installation Steps

Slide "Anchor Hook" over tie down point on end wall and1.
bolt to Anchor Strap.
Bolt "Anchor Strap" to "Anchor Plate" using provided hardware2.
For GB-50, Anchor Strap must be cut and shorteneed 3.
on-site to avoid piping.
Hold down force achieved by backfill weight acting on Anchor Plate.

4.
Anchor Plate may be bolted to concrete slab, if required, by using5.
holes provided in Anchor Plate.

2-Way cleanout
tee (by others)

Optional Anchor kit
see detail

2-Way cleanout
tee (by others)

Optional Anchor kit
see detail

SIDE VIEW DETAIL

For unit details see specification sheet for selected unit

(Connecting pipe and fittings by others)

NOTES:

Schier grease interceptors are rated and manufactured with an internal flow control system already in
place. 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.

Crushed aggregate
or sand

THE INFORMATION CONTAINED IN THIS DRAWING IS THE SOLE PROPERTY OF
PART OR AS A WHOLE WITHOUT THE WRITTEN PERMISSION OF

EXCAVATION AND BACKFILL DETAIL

(INTERIOR OR EXTERIOR)

DESCRIPTION:

PROPRIETARY AND CONFIDENTIAL

SCHIER PRODUCTS

SCHIER PRODUCTS

IS PROHIBITED.

. ANY REPRODUCTION IN

Optional Anchor kit
see detail

GREAT BASIN INSTALLATION, OPERATION
AND MAINTENANCE GUIDE

3 of 7SHEET NUMBER:

N.EBERTDWG BY:

DATE:

03/25/2014

MATL: PE

4REV:

Schier Products

9500 Woodend Rd

Edwardsville, KS 66111

Tel: [phone]

Fax: [phone]

www.schierproducts.com

Made in the U.S.A