The size of sump pump needed depends on the size of your basement or crawl space, the amount of water that needs to be pumped, and the rate at which water enters the sump pit. A professional plumber or contractor can help determine the appropriate size for your home.
If your home is prone to flooding or water leakage in the basement or crawl space, or if you live in an area with high water table, a sump pump may be necessary to protect your home from water damage.
Regular maintenance of your sump pump can help ensure it continues to work properly. This includes checking the sump pit for debris, cleaning the pump and discharge line, and checking the electrical connections. It's also a good idea to have the pump professionally inspected at least once a year.