Flash flood control units for housing

Abstract From the Canadian patent

A drainage system for housing constructions comprising at, least one fixture drain connected to a main drain a, building sewer evacuating waste waters from the main drain to the city drain, and a sump pump located in a water collecting reservoir in the basement of the housing for evacuation through a discharge line, of any water accumulating into the reservoir, the reservoir having a bottom outlet leading to the sewer. A check valve is mounted at the outlet of the reservoir to prevent backflow from the building sewer the, check valve being readily accessible from the reservoir and, a discharge line, used to expell excess waters with the sump pump, running from the pump outside of the house. …