Grease trap / interceptor service increments will vary depending on the size and the amount of usage. During your next service be sure to ask the technician the grease, water, and solid contents to determine the service increments. Failing to pump or clean in an untimely manner the grease trap / interceptor can cause in bound and out bound lines to clog, grease interceptor / trap to overflow, foul odor, grease to harden, and violations.