How your sewer and drain system operates. Understanding your system. Frequently Asked Questions. A sanitary system for toilets, urinals and bathroom sinks, and a kitchen system for floor drains, dishwashers and prep-sinks.
Floor drains allow drainage from the floor into the sewer.
P-traps provide a liquid seal against sewer gases and odors. Roof vents enable gases and odors in drainage pipes to escape to the outside. . . . Grease traps are the part of the kitchen system that capture grease and oil from the wastewater flow. Small inside grease traps are usually located in the kitchen floor preparation areas or near dishwashers. This type of grease trap requires frequent maintenance and is typically ineffective.