Plumbing Tier 1 Practice Exam 2025 – Comprehensive Prep Guide

The function of a grease trap is to collect fats, oils, and grease from wastewater. In commercial kitchens, restaurants, and food processing facilities, grease and fats are frequently introduced into the plumbing system during food preparation and cleaning. When these substances enter the sewer system, they can cause significant blockages and lead to costly plumbing issues.

Grease traps work by slowing down the flow of wastewater, allowing the lighter fats and oils to rise to the surface and be trapped, while the heavier solids settle at the bottom. This separation helps prevent the accumulation of grease in the plumbing system, ensuring smoother operation and reduced risk of clogs in municipal sewer lines.

In contrast, options related to removing solid waste, filtering debris, or storing leftover water do not accurately describe the primary purpose of a grease trap, as these functions pertain to different plumbing mechanisms or processes.