Low elevation, a high water table and heavy Lowcountry rain mean standing water under the house is a routine North Charleston problem.
Crawl spaces, not basements
Basements are rare here, so most of this work is keeping water off the underside of the house — away from ductwork, insulation and floor framing. Persistent crawl space moisture is also what causes the musty smell people usually blame on the air conditioning.
Why pumps fail when needed
A float switch stuck after months idle, a check valve letting water run back into the pit, or no backup when the power goes. In the Lowcountry heavy rain and power loss arrive together, so a pump without battery backup is off precisely when it matters.
Older homes near the rivers
Properties closer to the Ashley and Cooper sit lower and take on groundwater sooner in a storm cycle. Those benefit from a properly sized pit and a backup pump rather than a minimum installation.
Test it before hurricane season
Pour a bucket into the pit and confirm it starts, moves water, and stops cleanly. Two minutes now beats discovering it during the storm.