Sump Pumps

A sump pump is installed in a basement to provide drainage; it is used to mechanically evacuate water that flows into the sump liner. The water that enters the sump liner can originate from several sources:

• The weeping tile system around the exterior perimeter of the home;
• Water beneath the basement floor (applies only when there is a perforated liner); and
• From an internal de-watering system installed beneath the basement floor around the interior perimeter of the home.

Types of Sump Pumps

In a residential setting there are typically 2 types of sump pumps that are used:

• Pedestal sump pumps; and
• Submersible sump pumps.

At AquaGuard Injection & Waterproofing™, we recommend the use submersible sump pumps because they allow the liner lid to be installed flush with the floor, allowing you to place a freezer etc, or carpeting right on top of it, effectively making it invisible in a finished basement and it doesn't take up valuable floor space. The following illustration shows a typical submersible sump pump installation.

Desirable Properties of a Sump Pump

Within the waterproofing and plumbing service industries, there are preferred sump pump characteristics as follows:

• A perforated sump liner allowing water beneath the basement floor to migrate into the sump liner;
• An airtight lid to prevent water in the sump pit from evaporating and increasing humidity levels in the basement. The lid also prevents objects from falling into the sump liner and consequently interfering with the pump's float switch; and
• A submersible pump of cast iron construction. This feature protects the sump pump from damage caused by large debris entering the sump liner.

Sump Pump Backup Systems

Depending upon where you live, as well as your tolerance for risk, you may elect to install a battery operated backup pump in case there is a power outage of a relatively long duration. Battery operated backup pumps provide protection during power outages and are often equipped with alarms that advise you that your pump has failed.