These Zurn grease traps are identified by their pound (#)and gallon per minute (gpm) capacity. In order to find the right grease trap for your given application, you should know the size of the sinks which the grease trap will be used for. We also carry several solids interceptors. These products are not grease traps, but instead are made to catch small solid objects. Grease traps may be installed underneath a sink, or buried underground. These grease traps should be cleaned on a regular basis to ensure they continue to work properly. Each Zurn grease trap includes a flow control valve that operates the flow through grease trap itself. Purchasing the right size grease trap will ensure that your system operates properly. Grease traps may be selected based on flow of water or by sink sizes.