Footer Drain Process
The footer drain is designed to take away excess water from outside the basement walls and under the floor slab. The water flows by gravity to the private storm water lateral leading to the main storm sewer. The footer drain works in conjunction with the grading around the foundation, gravel over the drain, and waterproofing applied to the foundation. When wet weather occurs, excess water may flow along the foundation wall and enter the footer drain. The water then flows by gravity through the footer drain to the private storm lateral, or it may be pumped by the means of a sump pump. During a heavy rain storm, an undersized sump pump may allow for storm water to back up into your home.
Minimum Sump Pump Size
The recommended minimum size for a sump pump is as follows:
- One 4,000 gallons per hour (GPH) primary submersible sump with a ten-foot lift.
- One 2,000 gallons per hour (GPH) fully automatic, marine type battery operated, standby sump pump system (backup pump).