Oldcastle Precast, Inc.
28499 SW Boberg Rd
Wilsonville OR, 97070-0323
Phone: (503) 682-2844
Fax: (503) 682-2657
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Skip Navigation LinksHome > Products > Environmental > Grease Interceptors

Grease Interceptors  

Note:  Please find our new line of Grease Interceptors below.  Pay careful attention to the Recommended Cleanout and Maintenance Procedures.

Oldcastle Precast grease interceptors are an effective solution for the removal of FOG (Fats, Oils, Grease), thereby decreasing maintenance costs and the deterioration of collection systems. Removing grease from waste effluent saves money and aggravation by protecting septic systems and sewage lines from plugging and failure.

As with other containment vaults, grease interceptors must be cleaned and maintained regularly to remain effective.

Oldcastle Precast offers standard sizes ranging from 1,000 to 5,000 gallon capacities.

We also offer an optional epoxy coated interior to prevent corrosion and extend the life of the tank.

Sizing Criteria:

The volume of the interceptor shall be determined by using Table 10-3, Section 1014.3.6 of the 2011 Oregon Specialty Plumbing Code. If "drainage fixture units" (DFU’s) are not known, the interceptor shall be sized on maximum DFUs allowed for the pipe size connected to the inlet of the interceptor. Refer to Table 7-5.

Catalog No. Max. Vol. (Gal) Max. DFU's Piping Size (inch)
 576-GA-1000  1,000  35  4
 5106-GA-1500  1,500  172  4
 612-GA-2000  2,000  216  4
 612-GA-2750  2,750  325  6
 816-GA-3000  3,000  342  6
 816-GA-4000  4,000  428  6
 816-GA-5000  5,000  576  6


 576-GA-CWS  1,000  35  4
 5106-GA-CWS  1,900  204  4
 712-GA-CWS  2,500  307  4
 816-GA-CWS  4,000  428  6

Our  new "CWS" style grease interceptors offer these benefits:

- larger inlet bay for increased FOG capacity (fewer cleanings)

- modified piping for improved FOG separation

- additional clearance above the water line (improves accessibility to waste lines for easier cleaning)

- 30" diameter access covers (instead of 24") for improved accessibility and easier cleaning

All grease interceptors are manufactured to the IAPMO/ANSI Z1001-2007 standard and are “IAPMO” listed,  http://pld.iapmo.org, file #4296.

We also have a product available for handling mixed wastes from alternate sources, the "Multi-Ceptor", http://multiceptor.com




Images Product Name Materials Docs
Grease Interceptor - Sizing Chart 1,000 - 5,000 Gallon Capacities, 35 - 576 Drainage Fixture Units pdf
Grease Interceptor Sediment Vault Vault Placed Upstream of Grease Interceptor to Improve System Efficiency Concrete pdf dwg
1000 Gallon - 576-GA-1000 1,000 Gallon, 35 DFU Concrete pdf dwg
1500 Gallon - 5106-GA-1500 1,500 Gallon, 172 DFU Concrete pdf dwg
2000 Gallon - 612-GA-2000 2,000 Gallon, 216 DFU Concrete pdf dwg
2750 Gallon - 612-GA-2750 2,750 Gallon, 325 DFU Concrete pdf dwg
3000 Gallon - 816-GA-3000 3,000 Gallon, 342 DFU Concrete pdf dwg
4000 Gallon - 816-GA-4000 4,000 Gallon, 428 DFU Concrete pdf dwg
5000 Gallon - 816-GA-5000 5,000 Gallon, 576 DFU Concrete pdf dwg
CWS 1000 Gallon - 576-GA-CWS 1,000 Gallon - Clean Water Services Specification Concrete pdf dwg
CWS 1900 Gallon - 5106-GA-CWS 1,900 Gallon - Clean Water Services Specification Concrete pdf dwg
CWS 2500 Gallon - 712-GA-CWS 2,500 Gallon - Clean Water Services Specification Concrete pdf dwg
CWS 4000 Gallon - 816-GA-CWS 4,000 Gallon - Clean Water Services Specification Concrete pdf dwg
Grease Interceptor - Cleanout & Maintenance Recommended Cleanout & Maintenance Procedures pdf
Grease Interceptor - Installation Instructions CWS CWS Installation Instructions pdf
Grease Interceptor - Installation Instructions Standard GA Standard GA Installation Instructions pdf
Vault-Sampling Vault Placed Downstream of Separator for Sampling Effluent pdf dwg

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