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The Premier Online Plumbing Supplier Since 1995

Large Capacity Grease Interceptors

by Zurn

zurn large capacity grease interceptor#Z1172

This large capacity grease interceptor features:
  • Perfect for restaurant use, these units help prevent grease from clogging waste pipes and sewer lines by intercepting grease from cooking and processing kettles, scullery sinks, and dishwashing machines
  • Designed with a dual compartment separation chamber, these large capacity grease interceptors allow for a large volume of grease to be collected, making them ideal for kitchens with large flow amounts
  • Flow rates from 75 to 500 GPM
  • Acid resistant coated interior and exterior
  • Fabricated steel construction
  • Includes internal air relief by-pass
  • Bronze cleanout plug can be used as a sampling port
  • Visible double wall trap seal with removable pressure equalizing/flow diffusing baffle
  • Gasketed non-skid secured cover has covered recessed lift handle and flow control fitting
  • Cover designed for foot and light traffic only
  • No-hub inlet and outlet in high position
  • Available with or without electronic grease level sensor and user notification system
  • Click for dimensional information for standard interceptor
  • Click for dimensional information for interceptor with user notification system

Z1172 Large Capacity Grease Interceptors

Part Number Inlet/
Flow Rate
Capacity Price & Quantity
Water Gal. Grease Lbs.
Z1172-900 3" 75 65 150 $11,085.34
Z1172-1000 100 110 200 $12,026.18
Z1172-1100 125 150 250 $12,626.40
Z1172-1200 4" 150 195 300 $13,333.76
Z1172-1300 200 270 400 $19,414.72
Z1172-1400 5" 250 465 500 $22,604.19
Z1172-1500 300 665 600 $26,459.67
Z1172-1600 6" 350 865 700 $29,533.43
Z1172-1700 400 1095 800 $31,058.77
Z1172-1800 450 1280 900 $35,155.78
Z1172-1900 500 1440 1000 $36,801.23

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zurn large capacity grease interceptor#Z1172-UN

Z1172-UN - Large Capacity Grease Interceptors
with grease sensor and user notification system

Part Number Inlet/
Flow Rate
Capacity Price & Quantity
Water Gal. Grease Lbs.
Z1172-UN-900 3" 75 65 150 $15,187.45
Z1172-UN-1000 100 110 200 $16,559.88
Z1172-UN-1100 125 150 250 $17,187.79
Z1172-UN-1200 4" 150 195 300 $17,919.86
Z1172-UN-1300 200 270 400 $23,971.29
Z1172-UN-1400 5" 250 465 500 $25,989.07
Z1172-UN-1500 300 665 600 $29,776.25
Z1172-UN-1600 6" 350 865 700 $32,698.73
Z1172-UN-1700 400 1095 800 $35,612.46
Z1172-UN-1800 450 1280 900 $39,262.38
Z1172-UN-1900 500 1440 1000 $41,278.23

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No-Hub Couplings for Grease Interceptors

no-hub couplings

Pipe Size Approx. OD
of pipe it fits
Price & Quantity
3" 3.35" o.d. $6.34
4" 4.38" o.d. $8.71
5" 5-1/4" o.d. $16.20
6" 6.3" o.d. $17.28

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Grease Interceptors Related Items

Frequently Asked Questions

Q. "How does the grease level sensor and user notification system work?"
A. The grease sensor, if properly installed and maintained, sends a signal to the user notification system based on the level of water and oil in the unit. A green light on the user notification system display box shows all is functioning within normal parameters, while the yellow light indicates that a cleaning is advised. The user notification system sounds an audible alarm and lights up a red light on the display box to announce the need to clean the grease interceptor right away. Please note that the interceptor must be cleaned out on a regular basis, with any grease removed from the sensor so it can function correctly.

Q. "Why does my grease trap back up and overflow? If I buy a new one from you will it backup and clog less?"
A. Grease traps back up either because they need to be cleaned or because of an outlet blockage. Buying a large unit would mean you'll need to clean it less often as there is more storage capacity of grease. But please understand that all grease traps will clog if you don't clean the grease regularly.

Q. "Yesterday I had our grease trap pumped clean and today the trap overflowed. Why did this happen?"
A. Hopefully you had it pumped before it was stopped up. Pumping the grease trap alone does not prevent stoppages down the line. While pumping grease, grease can get into your main line if the pumping is done wrong. Also, if you had it pumped because you had a stoppage and so assumed it was due to the grease trap, it might be that you had a partial stoppage already in your main line.

Q. "How does a grease trap work?"
A. A grease trap works by slowing down the flow of warm/hot greasy water and allowing it to cool. As the water cools, the grease and oil separate and float to the top of the grease trap. The cooler water (less grease) continues to flow down the pipe to the sewer. The grease is actually trapped by baffles, which cover the inlet and outlet of the tank, preventing grease from flowing out of the trap.

Q. "Does a grease trap prevent blockages and stoppages?"
A. Grease traps do help prevent stoppages after the trap but blockages can (and do) occur as a result of insufficient (not frequent enough) grease trap line maintenance. A grease trap or drain line which is not periodically maintained (you must take the grease out of the trap) will eventually clog.

Q. "My local governmental code wants to know how long the water stays in the grease trap?"
A. Basically the way some (many operate differently) health/safety/engineering departments figure the grease trap size needed is that they wish for you to keep the water in the trap for a certain period (length) of time. What that means is that if you have a 3 gallon per minute drain flow, and a 30 gallon grease trap, some agencies will consider the 3 gallons as having a 10 minute "hold" time. You figure this by dividing the gpm by the gallon volume of the trap.

Not all governmental bodies operate the same way so, please, contact them before you order a grease trap. Make certain that the size that you are ordering is the size that they will accept. Note that all grease traps have a maximum flow rate. Also note that for sanitation reasons, (all brands) grease traps are sealed and not open to the elements. Some brands of grease traps are difficult to open (not ours) but, in all cases, all grease traps are sealed. Again, generally (not always), the size of the grease trap versus the gallons per minute of your drainage is what determines the size that you are required to have. Please be certain of the size that is required by your local code or governmental regulatory agency because shipping is very expensive and we do not take them back. When in doubt, do not order these until you are certain of what you need.

The codes are designed to try to take the most grease out of the water. If you under size your grease trap then some of the grease could pass through and also you might need to pump out (take the grease out of) the trap quite frequently.

Q. "What connections come at the both ends of your grease trap interceptors?"
A. Both ends come with no-hub fittings. In other words, they come with a plain end. To adapt the ends to steel or plastic pipe you simply use a standard no-hub adapter.

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