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SI-75 | Indoor/Outdoor Solids Interceptor

SI-75

Solids Interceptor

SI-75

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Ratings
109 gal

Indoor / Outdoor

125 GAL

Liquid Capacity

Product Description

Kitchen solids interceptor

In many cases of interceptor backups, solids are to blame. Solids tend to result in immediate clogs, whereas grease problems happen over time. While our indoor/outdoor Great Basin® models have solids capacity built in, a separate solids interceptor should be considered when using a concrete or steel interceptor (to slow corrosion and rust), for restaurants with known solids problems, with any grease interceptor that does not include rated solids capacity, or in any facility that has a food waste grinder that is attached to the grease waste line.

More features:

  • 109 gallons of solids capacity

  • Rugged polyethylene tank

  • Safety Star® access restrictor prevents accidental entry

  • Fits through 36" doorways

  • Triple outlet feature allows for installation flexibility, including the ability to connect an unused outlet for remote pumpout (PP3 compatibility)

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Technical Information

Flow Rate
4" - 125 GPM

Solids Capacity 109 gal

Liquid Capacity 125 gal

Weight 120 lbs

Installation Location Indoor/Outdoor

SI-75 product image

Cover adapters can be raised or lowered 2 ½".

Accelerate your installation

With our easy-to-use, stackable riser system, your buried tank installation will go faster than ever. No cutting, no tools – just stack, twist, lock and repeat.

Learn about Fast Pitch®

Refine your installation

Once your Fast Pitch risers are set, insert and adjust your cover adapter to match finish grade with no unachievable dimensions. Adjust the cover adapter up to 5” or tilt 5 degrees in any direction for a perfectly flush-with-grade finish cover.

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Finish covers

All tanks ship with a temporary cover that must be replaced with either a P24-GI pedestrian cover or a T24-GI traffic cover. Covers are sold separately.

Safety star®

Safety Star has been redesigned to meet the standards of our new Fast Pitch riser system. It includes better structure, a molded-in center nut to fasten the temporary and pedestrian covers, locking ramp and tank product identification.

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Looking for the old me?

The Great Basin® line was redesigned and launched in July 2025. To find information on the previous version of this model, visit our "Legacy" page.

See legacy products

INLINE INSTALLATION RECOMMENDED WITH

GB-250 product image
1,895 lbs at 100 GPM
1,196 lbs at 200 GPM
GB-250-B product image
1,560 lbs at 75 GPM at 99%
GB-500 product image
3,048 lbs at 100 GPM
GB-500-B product image
2,817 lbs at 100 GPM at 99%

Accessories

FP24 product image
5" tall Fast Pitch® Riser for grease interceptors with 24" covers installed below grade.
T24-GI product image
Cover, 24in Traffic Rated, Grease Interceptor System
P24-GI product image
Cover, 24in Pedestrian Rated, Grease Interceptor System
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.
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

When is a solids interceptor recommended?

Solids interceptors are only recommended when required by the authority having jurisdiction or for applications where an unusual amount of solids discharge is anticipated. Schier’s indoor/outdoor Great Basin® models provide up to 25% solids capacity to sufficiently capture the greases and solids that go down the kitchen drain line.

When do you need to use a high-water/anti-flotation anchor kit?

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).

What cover options are available for Schier solids interceptors?

The two cover options are the H-20 load-rated pickable cast iron cover (T24-GI) and the bolted, injection-molded polypropylene cover (P24-GI). If the unit will be installed outside of the building and/or in a vehicle traffic area, it needs the H-20 load-rated cast iron cover(s). If the unit will be installed inside the building and/or above grade, it needs the bolted polypropylene cover(s). All indoor/outdoor grease interceptors, solids interceptors and inspection ports are sold with a temporary cover, which must be replaced with one of these two cover options post-install.

How can I view legacy products?

If you're looking for legacy products, please visit the Legacy Products page

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