Step One - Determine Flow Rate
Trapzilla Grease Interceptors are rated according to the ASME A112.14.3 standard to separate grease efficiently at or below a specific flow rate. This sizing methodology uses the principle that the highest potential flow rates in a kitchen come from impounded water flows when full sinks are emptied. You therefore need to determine the maximum potential flow for your kitchen by sizing each sink compartment connected to the grease interceptor. To do this please use this formula:
Add together flow rates of fixtures feeding to Trapzilla while understanding that restaurants rarely reach 1/3 of peak flow.
Number of compartments x Compartment x .75* ÷ 1,000,000 ÷ 2** = Flow Rate
Volume in Inches (Litres per Second)
(L x W x H)
*The PDI-G 101 standard for calculating flow rate assumes a sink will not be filled to more than 75% of its volume.
**The PDI-G 101 and ASME A112.14.3 standards, by which hydromechanical interceptors are certified, use a 2 minute drain to determine flow rate.
Step Two - Determine if Additional Grease Capacity is Needed
If your facility requires a larger capacity in an effort to decrease pumping, or if you need to act on local authority requirements, you may need to select a larger unit or additional units may be added.
Trapzilla Grease Interceptors exceed the grease capacity required by ASME standards. The unique design of Trapzilla maintains a flat separation curve within the unit until it reaches 100% capacity, so it has the same separation efficiency from day one until it is full.
If additional capacity is needed to meet local code, Trapzilla units should be installed in parallel when possible using a Trapzilla Flow Splitter for equal distribution of flow and to maximise the unique storage capacity of the units.
Step Three - Determine Installation Conditions
Trapzilla offers a variety of models designed to meet your specific installation conditions. Please ask Aqua Mundus for support on how to determine the right unit for your facility’s requirements. Depending on your types of establishment you can install Trapzilla Above-Ground, In-Ground or Below-Ground.
Step Four - Choosing Additional Options
Options are available depending upon the type of installation. Additional extension collars may be necessary depending upon pipe depth. Be sure to determine depth from ground to centre of pipe to make sure you have the correct options specified.
Potential additions you may need are Solids Separators (these offer additional Solids Handling Capacity), Extension Collars (will raise the lid to grade in deeper installations), Optional Covers (heavy-duty aluminium covers for high foot-traffic locations, Hanging Assemblies (these keep the lid at floor level in the kitchen while the unit hangs in-between floors or in a parking deck) and Flow Splitters (these evenly distribute flow between parallel-plumbed interceptors).
Additional Options including in-kitchen solids strainers, horizontal air gap assemblies and automatic grease removal devices can also be supplied.
Our team will be happy to assist you with any questions or queries. Please call the office on 01386 832205.