A sump pump removes water that has accumulated in a sump basin, commonly found in the basement or crawlspace of homes. The water may enter from the perimeter drains of a basement waterproofing system, funneling into the basin or because of rain or natural ground water, if the basement is below the water table level.
Sump pumps are used where basement flooding happens regularly and to remedy dampness where the water table is above the foundation of a home. Sump pumps send water away from a house to any place where it is no longer problematic, such as a municipal storm drain or somewhere else outside the home.
Wherever a need for a sump pump exists, you need to have a backup plan to protect your home should a power outage occur. Battery backup sump pumps top the list of solutions—typically powered by a deep cycle battery and kept charged by a trickle charger. The quality and size of these pumps and backup power source vary greatly. Another sump pump backup option is municipal water back up, which is powered by the water main in your house and not by a battery. This type of pump will only work if your home is supplied by city/municipal water and not well water.