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Adapter

Adapter

Cover

Cover

Gasket

Gasket

GB-250

(standard)

Upper clamp

Lower clamp

Lower clamp

Upper clamp

Cut location "C"

LR24 

(long riser)

(optional component)

Gasket

Upper Clamp

Lower Clamp

Cut location "B"

SR24 

(short riser)

(optional component)

Gasket

Lower Clamp

Upper Clamp

GB-35, GB-50, 

GB-75 & GB-125

(standard)

Adapter

Cover

Gasket

Upper clamp

Lower clamp

Finished floor

Figure 1

Riser Height

Adapter

Unit

Call Schier with questions or suggestions @ 1-800-827-7119  Customer Service Hours: 7AM-5 PM CST

Figure 2

Adapter

Riser

Riser  

Distance from step 5

4"

Cut

Mark

Figure 3

Adapter

Riser

exceed 4"*

Must be at least

2-1/2" and cannot

Gasket

Unit

Riser/Adapter

Upper Clamp

Lower Clamp

Figure 4

*3" for a GB-35 with 4" connections

5.  Adjust 

adapter

 upwards to reach 20" to 22" 

6.  Adjust 

adapter

 upwards to reach 35" to 37"   

Cut location "A"

Adapter

Cover

Adapter & Cover 

(standard component)

Tools included (with base grease interceptor unit(s))

7/16" Nut driver tool/bit

Silver permanent marker

Tools Needed:

Tape measure

Regular or cordless drill with 1/2" chuck

Tools needed if Riser(s) require cutting:

Jigsaw or

Cordless circular saw or

Reciprocating saw

Riser Assembly Instructions/Steps:

If unit is to be installed on grade (on-the-floor), there is no need for any adjustments.  

1.

Unit is ready to be put into service.

   

If unit is to be buried:  Once unit is set so that the pipe connections line up with 

2.

jobsite piping, measure total riser height needed from top of cover to finished 

grade.  Make sure you include any future tile work, etc. that may be installed 

in your finished grade measurements.  See figure 1. 

    

Select according riser(s) needed based off Table 1.

3.

   

If riser(s) is needed, remove cover(s) from adapter and remove adapter from main 

4.

unit by loosening upper clamp with included nut driver bit (lower band is factory

set do not adjust or remove).  On the floor near the unit, insert adaptor into first riser 

until it stops.  If needed, insert bottom of first riser into top of second riser until it stops.  

You may need to tighten upper clamps during this step to keep risers from shifting.  

Adapter and riser(s) should sit level with each other.  Removal of cover during this process 

will ease assembly.

   

From the top of the adapter, measure your needed total riser height downward to the 

5.

sidewall of the riser.  Then, add 

5”

 (for GB-35 or GB-50) or 

6”

 ( for GB-75, GB-125 or GB-250).  

For example, if you have a GB-250 and need a 15-1/2” extension, you would measure 

down from the top of the adapter 21-1/2” (15-1/2” + 6” = 21-1/2”).  See Figure 2.

   

Refer to Table 2, Table 3 or Table 3a to determine if, and where, any cuts need to be made.  

6.

If a cut needs to be made, make a circular line around the sidewall of the riser with the 

included silver marker at your riser height 

+dimension from step 5

.  Using a jigsaw, circular 

saw or reciprocating saw, cut along your line.  Discard/recycle the cutoff scrap.

   

Whether the riser needs to be cut or not, make another mark with the silver marker on the 

7.

sidewall of the riser a distance of 

4 INCHES

 (3 INCHES for a GB-35 w/ 4” connections) above 

the edge just cut.  If you did not make a cut (meaning your riser height 

+ dimension from 

step 5

 line was beyond the bottom edge of your riser), still mark the sidewall of the riser 

4 INCHES above where your riser height 

+ dimension from step 5

 line would have been.  

DO NOT cut this new line.  Once the riser is installed into the main unit, this new line will end 

up at the top of the gasket and will aid in re-assembly.  See Figure 3.

    

IMPORTANT:  Before the next step:

8.

Make sure both diffusers are installed inside the main unit at the appropriate locations 

1.

and check if there needs to be any flow control adjustment on the inlet diffuser.  Refer 

to sheet 2 of the installation instructions for flow control adjustment.

Refer to sheet 1 of the installation instructions for leak/water testing procedures.

2.

   

Take riser(s) and adapters apart to reduce the weight during installation.  Wipe all sidewalls and 

9.

inside of gasket with a damp cloth to remove jobsite dust/debris.  Install components into the main 

unit starting from the lowest (cut) riser and working your way toward the finished floor level.  Upper 

clamps at each gasket need to be loosened or removed to aid in assembly.  Once riser(s)/adapter 

is inserted into gasket, upper clamp can be tightened.

      

Verify that the bottom of the lowest riser is protruding at least 2-1/2” but no more than 4” into 

10.

the main unit from the top of the gasket.  Your mark from step 7 should be at the top edge

of the gasket on the main unit.  If measurements were made correctly, this should happen 

automatically.  See figure 4.

   

If tilting of the adapter is required to be flush with finished grade, it must be done AFTER all 

11.

clamps have been tightened with riser(s)/adaptor in a vertical and level position.  Tilting is 

achieved by using the flexibility of the gasket.  If tilting is done before clamps are tightened, a 

perfect gasket seal may be compromised.  Schier recommends tilting only the adapter versus the 

entire riser assembly to make sure your riser height is maintained.

   

Tighten all clamps to a minimum of 5 and a maximum of 8 ft lbs. of torque.  Use the same torque 

12.

as you would tighten a rubber no-hub coupling.

   

The adapter must be adjusted 

upward

 to achieve certain extension heights.  See Table 2, 

13.

Table 3 or Table 3a.

   

If jobsite riser height conditions change after the above steps have been completed, there 

14.

may still be room for vertical adjustment in both directions.  As long as minimum and maximum 

overlaps are maintained (see Figure 4), the adapter/riser(s) can be adjusted/cut as many times 

as necessary.  Please follow these steps from the beginning to ensure the proper overlaps are 

maintained.

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.

1.  Adjust 

adapter

 upwards to reach 22" to 24" 

2.  Adjust 

adapter

 upwards to reach 37" to 39"   

3.  Adjust 

adapter

 upwards to reach 56" to 58"

4.  Adjust 

adapter

 upwards to reach 70" to 72"

7.  Adjust 

adapter

 upwards to reach 19" to 21" 

8.  Adjust 

adapter

 upwards to reach 34" to 36"   

TeleGlide Riser (24 Series) Installation Guidelines

(GB-35, GB-50, GB-75, GB-125, GB-250)

DATE: 

11/1/10

GREAT BASIN INSTALLATION, OPERATION 

AND MAINTENANCE GUIDE

Schier Products

9500 Woodend Rd

Edwardsville, KS 66111

Tel: 800-827-7119

Fax: 800-827-9664

www.schierproducts.com

Made in the U.S.A

DESCRIPTION:  

DWG BY: 

TEU

REV: 

3 - 11/07/11

SHEET NUMBER: 

6 of 7

MATL: 

PE

THE INFORMATION CONTAINED IN THIS DRAWING IS THE SOLE PROPERTY OF 

SCHIER PRODUCTS

. ANY REPRODUCTION IN 

PART OR AS A WHOLE WITHOUT THE WRITTEN PERMISSION OF 

SCHIER PRODUCTS 

IS PROHIBITED.

PROPRIETARY AND CONFIDENTIAL

Summary of Contents for GB-15

Page 1: ...oducts were originally installed and will at its option agree to repair replace or supply credit to the original purchaser 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...

Page 2: ...y 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 Dispose of gre...

Page 3: ...ons 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 approximately 3 4 size rock or sand with no fines When setting GB 75 2 GB 250 2 ...

Page 4: ...FILLING FINISHED CONCRETE SLAB Before backfilling and pouring of slab secure cover s to the unit s 1 Backfill using crushed aggregate material approximately 3 4 size rock or sand 2 with no fines 3 Place 6 aggregate base under slab INTERIOR ABOVE GRADE INSTALLATION INSTRUCTIONS GB 15 GB 20 GB 25 If concrete slab falls within body of unit reinforce with rebar extending 6 beyond footprint of unit to ...

Page 5: ...s follow installation instructions outlined in installation packet Units must be piped as shown above to ensure that the units work properly as the system is designed The units must be equally spaced to ensure the equal distribution of effluent flow For systems that are installed below grade it is recommended to install a two way clean out tee extended to finished grade before and after each unit ...

Page 6: ...led into the main unit this new line will end up at the top of the gasket and will aid in re assembly See Figure 3 IMPORTANT Before the next step 8 Make sure both diffusers are installed inside the main unit at the appropriate locations 1 and check if there needs to be any flow control adjustment on the inlet diffuser Refer to sheet 2 of the installation instructions for flow control adjustment Re...

Page 7: ...p edge of the riser down to the finished floor Make sure to account for any future tile work 5 in your measurment See Figure 2 Remove riser from ring Take measurement from step 5 from the BOTTOM of the riser upwards towards the top of the 6 riser Mark a line around the riser and cut with handsaw jig saw or reciprocating saw Remove debris from cut edge with scraper utility knife or gloves See Figur...

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