High Capacity Grease Interceptors - schier

1 NYC code compliance GuideHigh Capacity Grease InterceptorsNYCGIC-0318 Notifi cationPolicies can and do change over time requiring specifying engineers and installing contractors to verify that the information contained in this guide is current with NYC-DEP and NYC School Construction Authority requirements regarding Grease interceptor acceptance. The information contained in this guide is believed to be reliable and is off ered in good faith but without guarantee. schier Products and its representatives and distributors assume no responsibility or liability for the use of this information. No warranty, express or implied, is made of the information contained in this guide by schier Products or by its representatives or distributors.

2 This guide is subject to change and will be updated as In its 2010 publication Best Management Practices (BMP s) for Non-Residential Direct and Indirect Dischargers of Grease into the Public Sewer System (15 RCNY Section 19-11), the NYC department of environmental Protection (NYC-DEP), in cooperation with department of Buildings, requires Grease Interceptors to be certifi ed to ASME or PDI G101 and sized by fl ow rate and Grease Capacity . schier s Great Basin line of Grease Interceptors are certifi ed to ASME and, therefore, accepted for installation in New York City. Eff ective May 2016, NYC-DEP has accepted schier s GBHF-250-200, which has a factory-rating of 200 GPM with 400 pounds Grease storage Capacity .

3 In some cases, sizing per 15 RCNY Section 19-11(c) guidelines will require a unit with a fl ow rate higher than 100 GPM, and while the NYC-DEP requires compliance with either ASME or PDI G101, there are no Grease Interceptors certifi ed to ether standard with fl ow rates over 100 GPM. NYC-DEP does accept Grease Interceptors that have fl ow rates higher than 100 GPM from manufacturers who have PDI or ASME accepted Grease Interceptors with fl ow rates less than or equal to 100 GPM. The accepted devices with higher fl ow rates must use the same engineering principles as the lower fl ow rate devices and must be proportionately larger than the smaller PDI or ASME approved fi rst link below will take you directly to 15 RCNY Section 19-11 Best Management Practices which includes the requirements for acceptance, sizing, selection, installation and maintenance of Grease Interceptors .

4 The second link will take you to schier s Certifi cate of Listing as published on the IAPMO Product Listing Directory, which shows the models certifi ed to ASME department of environmental Protection GB1GB2GB3GB-15GB-20GB-2520/25 GPM 35/50 GPM 50/75 GPM 15 GPM 20 GPM 25 GPM GB-35 GB-50 GB-75 GB-250 GBHF-250-20035 GPM 50 GPM 75 GPM 100 GPM 200 GPMG reat Basin Models accepted by the NYC department of environmental Protection:15 RCNY Section 19-11 Best Management Practices htt Basin IAPMO Listing htt le_no=0005317 Find the Great Basin Series and technical data packages by clicking link 3 Table ITable IIMinimum Grease interceptor retaining Capacity for: pot sinks, food prep sinks, scullery sinks and fl oor drains which are used for washdown purposes onlyMinimum Grease interceptor retaining Capacity for.

5 Scraper sinks, woks, automatic dishwashers and any fi xture receiving discharge from soup and stock kett les*Recommended Model NumberRecommended Model NumberAggregate volume in cubic inches of all fi xtures listed in this tableAggregate volume in cubic inches of all fi xtures, vessels and receptacles listed in this tableup to 2,462 8 lbs 4 GPM GB1 up to 1,231 8 lbs 4 GPM GB1 2,462 to 4,312 14 lbs 7 GPM GB1 1,232 to 2,156 14 lbs 7 GPM GB1 4,313 to 6,160 20 lbs 10 GPM GB1 2,157 to 3,080 20 lbs 10 GPM GB1 6,161 to 9,240 30 lbs 15 GPM GB1 3,081 to 4,620 30 lbs 15 GPM GB1 9,241 to 12,320 40 lbs 20 GPM GB1 4,621 to 6,160 40 lbs 20 GPM GB1 12,321 to 15,400 50 lbs 25 GPM GB1 6,161 to 7,700 50 lbs 25 GPM GB1 15,401 to 21,560 70 lbs 35 GPM GB2 7,701 to 10,780 70 lbs 35 GPM GB2 21,561 to 30,800 100 lbs 50 GPM GB2 / GB3 / GB-50 10,781 to 15,400 100 lbs 50 GPM GB2 / GB3 / GB-50 30,801 to 46,200 150 lbs 75 GPM GB3 / GB-75 15,401 to 23,100 150 lbs 75 GPM GB3 / GB-75 46,201 to 61.

6 600 200 lbs 100 GPM GB-250 23,101 to 30,800 200 lbs 100 GPM GB-250 61,601 to 92,400 300 lbs 150 GPM GBHF-250-200 30,801 to 46,200 300 lbs 150 GPM GBHF-250-200 92,401 to 123,000 400 lbs 200 GPM GBHF-250-200 46,201 to 123,000 400 lbs 200 GPM GBHF-250-200 Sizing From Title a5 RCNY Section 19-11, the minimum size Grease interceptor is determined by aggregate volume, which is the maximum volume in cubic inches of all fi xtures, vessels and receptacles that may fl ow simultaneously through the interceptor. Depending on what fi xtures are being used, sizing will be based on Table I, Table II or a combination of both.

7 "NYC-DEP confi gured table I and table II by using Grease pounds to determine the size of Grease interceptor, but always intended that the fl ow rate of the interceptor was to be one-half of the Grease pounds listed. The NYC-DEP has clarifi ed the policy and will not allow a Grease interceptor to be sized based solely on its Grease storage Capacity if the Interceptors actual fl ow rate would be less than that indicated by taking the Grease pounds from Table I or Table II and dividing by two. For example, 20,000 cubic inches of aggregate volume in Table I would require 70 lbs. Capacity or a 35 GPM fl ow rate. While schier s GB1 can hold 70 lbs. of Grease its fl ow rate would only be 20 GPM and would therefore be incorrectly sized according to NYC-DEP requirements.

8 The proper size interceptor would be a schier GB2, which may be used at a fl ow rate of 35 GPM with a Grease Capacity of lbs. Excess Grease storage Capacity is accepted by the NYC-DEP but not a lower fl ow table below shows the alteration from Lbs. to GPM with the right recommended Great Basin Model:NYC department of environmental Protection NYCGIC-0318 4 Acceptance Eff ective April 2015, the NYC School Construction Authority now lists schier s Great Basin as an accepted Grease interceptor for on-the-fl oor, semi-recessed or recessed installations as accepted in Division 15 Plumbing and Drainage Section 15415. The following link will take you directly to this section:NYC SCA 15414 Drainage Grease InterceptorsNYC School Construction Authority also has design requirements for Grease Interceptors , which can be accessed under Section 6 Mechanical Services under Plumbing Grease Interceptors and Oil Separators.

9 The link below will take you directly to the design requirements for Grease Interceptors and Oil Separators:NYC SCA Grease Interceptors and Oil SeparatorsNYC School Construction Authority