This website requires Javascript for some parts to function propertly. Your experience may vary.

GB-50 | Indoor/Outdoor Hydromechanical Grease Interceptor

GB-50

Hydromechanical Grease Interceptor

GB-50

Online: $2,086.00

List: $2,980.00

Buy Now

Ratings
50 GPM / 439 lbs
75 GPM / 287 lbs

Indoor / Outdoor

65 GAL

Liquid Capacity

Product Description

50/75 GPM Hydromechanical Grease Interceptor

The GB-50 offers best-in-class certified grease capacity and 20% kitchen solids waste capacity. It can be installed above grade (on the ground) or buried below grade (compatible with FCR2 riser to bring system to grade), as well as indoor or outdoor. The triple outlet feature allows for installation flexibility, including the ability to connect an unused outlet for remote pumpout (PP3 compatibility).

More Features:

  • Rugged polyethylene tank body

  • No flow control required, first in the industry certified to Type D of the ASME standard

  • Safety Star® access restrictor prevents accidental entry

  • Fits through 36" doorways

Listed by IAPMO to ASME A112.14.3 and CSA B481.1.

Need Documentation?

Technical Information

Flow Rate/Grease Capacity
50 GPM (3.2 L/s) / 439 lbs (199.1 kg)
75 GPM (4.7 L/s) / 287 lbs (130.2 kg)

Solids Capacity 13 gal (49.2 L)

Liquid Capacity 65 gal (246.1 L)

Weight 148 lbs (67.1 kg)

Installation Location Indoor/Outdoor

GB-50 product image
The GB-50 is now dual rated!

On-Grade Perfection

Schier's cover adapters give 4" of vertical adjustability and up to a 5-degree tilt in any direction, helping to ensure covers are installed perfectly inline on the concrete pad.

GREAT BASIN® FEATURE

TRIPLE OUTLET

Three outlets available for installation flexibility and optional pumpout port connection.

On the tank

Product ID label with technical and certification details (also available inside the cover adapter)

"Made By" label featuring one of our product builders and the date your interceptor was built

.

Riser Options

Schier's FCR2 field cut risers are designed for easy modification in the field to reduce jobsite installation time and eliminate custom riser costs.

If using 24" corrugated risers (by others), you will need the CA2 riser adapters. You will not use a CA2 with an FCR2.

SHOP RISERS

Accessories

FCR2 product image
Riser for grease interceptors with 24" covers installed below grade.
PP3 product image
Pumpout Port Kit that converts an outlet into a pumpout port. Use with GB-50, GB-75, GB-250, GB-500.
AK1 product image
This anchor kit is recommended for installation in high water table conditions to prevent float out.
ATD1 product image
For securing covers to units in ABOVE GRADE INSTALLATIONS with increased head pressure conditions.
CA2 product image
Adapter for 24" Corrugated Pipe Riser
CC2 product image
For recessed and suspended units with 24" covers.
PLAIN-EA-24 product image
4" MPT - 2" Plain End Fitting.
PLAIN-EA-34 product image
4" MPT - 3" Plain End Fitting.
FPT-EA-23 product image
3" MPT - 2" FPT Fitting.
FPT-EA-34 product image
4" MPT - 3" FPT Fitting.

Frequently Asked Questions

Are the Great Basin® indoor/outdoor units traffic rated (H-20 load rate)?

These units are traffic rated if they are installed in accordance with our installation instructions. The unit will need the H-20 load-rated cast iron covers and a traffic-rated pad at grade per our installation detail.

Can corrugated pipe be used as a riser on the Great Basin® indoor/outdoor units?

A 24" double wall corrugated pipe can be used as a riser for these units. You will need to purchase Schier's adapter for 24" corrugated pipe riser (CA2).

Can the discharge from a food waste grinder be run through the Great Basin® indoor/outdoor units?

These units have solids capacity of 20% or more of the unit's liquid volume, but food waste grinders can quickly overwhelm a grease interceptor. If the food waste grinder is connected to the unit, we recommend a solids interceptor in front of the grease interceptor.

Can the Great Basin® indoor/outdoor units be installed above grade (on the ground)?

All Great Basin® indoor/outdoor models can be installed above grade. The the adapter tie down kit (ATD1) is recommended to ensure the adapters do not become unseated in the event of a downstream backup. A GB-500 installed above grade must also have the above grade support kit (AGS2).

Can the Great Basin® units be used with a dishwasher?

These units can be used with a dishwasher. If the dishwasher will have a discharge temperature higher than 150 degrees Fahrenheit, the system will require a drain tempering valve to reduce the water temperature.

Can you suspend the Great Basin™ indoor/outdoor units from the ceiling above?

These units can be suspended from above (with the exception of GB-1000 and GB-1500). The unit needs to be fully supported across the bottom with risers extending to the floor above. It is the responsibility of the specifying engineer or installer to design a support system appropriate for the weight of the unit with water. If suspending a GB-250, the unit must be installed with the above grade support kit (AGS1). If suspending a GB-500, the unit must be installed with the above grade support kit (AGS2).

Do the Great Basin™ indoor/outdoor units need to be installed inside a vault to be buried in a high-water table area?

If the units will be installed in an area where the water table will crest the inlet/outlet pipe, additional steps need to be taken to protect the unit from the extreme hydrostatic forces. The unit would need to be placed in a water tight vault or encased in concrete. If there is a possibility that ground water will come into contact with the unit, there needs to be a high-water/anti-flotation anchor kit installed (AK1, AK2, AK3).

Do the Great Basin® units require a fixture vent?

These units do not require a fixture vent. The internal design of the unit will ensure proper function without a fixture vent. Any venting to the piping connected to our unit is at the discretion of the local authority.

How much space is needed between units when they are installed in series?

There should be a minimum of 6" between the units when installed in series. In a buried application, this space will ensure there is enough backfill in between the units.

Our fixture has an air gap and discharges into a floor sink, which is overflowing. How can we fix this?

Due to the low head pressure in this scenario, the first solution is to remove the internal flow control. This low head pressure ensures the unit will not exceed its certified flow rate. If that doesn’t solve the issue, the next solution is to add a flow restrictor to the tailpiece of the fixture.

What are the minimum and maximum riser heights of buried Great Basin™ indoor/outdoor units?

The adjustable adapters that ship with these units offer up to 4" of built-in riser height. The maximum height for field cut risers is 94," which is equivalent to three FCR2 risers (sold separately). If the unit is suspended with risers to the floor above, they can use more than three if needed.

Scroll To Top