Short answer
Usually, yes. Many Canadian municipalities require a grease interceptor on kitchen drains that carry fats, oils and grease through their sewer-use bylaws, and provincial plumbing codes also set rules for them. Which fixtures connect to it and how large it must be depend on local rules, so have a licensed plumber size it with your municipality's requirements in hand.
A grease interceptor slows the wastewater so fat floats and solids settle before the water reaches the sewer. It sits in line with fixtures such as pot and prep sinks, either under a sink, set into the floor or as a larger unit outside.
It only works if it is maintained. Plan for regular cleaning or pumping and keep records, because some municipalities inspect grease interceptors and ask for maintenance logs.
Scraping plates into the garbage before washing, and never pouring fryer oil down a drain, keeps the interceptor from filling quickly.
Updated · By Norpex