Oil interceptor sizing

The purpose of a grease interceptor is to trap and store the suspended grease from the water passing through it. They are usually connected to kitchen sinks , floor drains, and any other plumbing fixtures in restaurants, hotels and institutions that discharge grease laden waste water. A correctly sized grease interceptor reduces maintenance costs for restaurants and prevents the chance of a messy and costly overflow. When it comes to sizing grease interceptors , many plumbing codes focus on either flow rate or liquid volume.

This sizing tool is to provide a product(s) recommendation based on two factors: Maximum flow rate - Calculated based on each of the sink compartment dimensions and the number of additional fixtures (i.e. mop sink, hand sink, pre-rinse sink, etc.) connected to the grease interceptor.

To determine the right sizing , you need to limit the number of fixtures connected to the grease trap. Fixtures connected to the trap may include mop sinks , pot sinks , 3-compartment sinks , and dishwashers. Zurn oil interceptors are designed similar to the grease interceptors.

Both work on the principle that oils are lighter than water and thus gravity causes the oil to rise and the water to fall. The interceptor shall have an interior baffle for full separation of the interceptor into two sections. The outlet pipe shall be the same size as the inlet, the minimum being three inches, and the baffle shall have two openings of the same diameter as the outlet pipe and at the same invert as the outlet pipe.

Determine the flow rate for each sink to be serviced by the grease trap using the same calculations as a single sink.

Add together 1 of the largest flow rate, of the second largest, and of all others. The result is the recommended flow rate (in GPM) of the grease trap. After selecting the interceptor size and type, the correct size of interceptor is based on the flow into it based on rainfall onto a given surface area, this is known as nominal size or NS.

This will indicate the nominal flow that the interceptor is sized for e. Sand- oil interceptors should be sized for a minute detention of peak flow. Peak flow should be determined by fixture units rather than some estimating method. If too much oil accumulates in the receiving and middle chambers, it may flow into the wastewater outlet chamber and end up being discharged to the environment. SIZING - PDI METHOD Table Al.

Sizing and Rating PDI Size symbol GPM Flow Rate Lbs. An example of this sizing formula is included to illustrate the steps. Sediment and chips are collected in sediment bucket and should be periodically removed. Call Now To Speak With Our Dedicated Customer and Product Support Teams.

Invented By Former Restaurant Owner. Interceptors should not be located directly in traffic areas. It is important to size a grease trap larger than calculated (round up to next available size only).

A grease interceptor that is extremely oversized will have longer periods between pump-outs. The rotting grease will adversely affect the structure of the grease interceptor. If sized per the IPC methodology, the required interceptor capacity would be 15gallons. Gravity grease interceptors shall be designed to remove grease from effluent and shall be sized in accordance with this section.

The task also includes discussion on the circumstances when a hydromechanical grease interceptor (HGI) can be a suitable alternative to a gravity grease interceptor (GGI). Note: Dishwashers can be connected to a Grease Trap only if allowed by local code. Each dishwasher will require a seperate Grease Trap.

This fog can be frightening, but a different type of fog evokes horror for public health officials in every municipality. Fats, oils and grease, also known as FOG, can build up in sewers and cause partial or complete blockages, which can then lead to sanitary sewer overflows. Grease interceptors shall be equipped with devices to control the rate of water flow so that the water flow does not exceed the rated flow. Used in service stations, parking garages, and industrial plants where discharged water contains oil and sediment. Buy Grease interceptor s at the Best Prices.

No More Clogged Grease Traps.