It is recommended to test your sump pump at least once a month by pouring a bucket of water into the sump pit to ensure that it is working properly. It's also a good idea to test your sump pump after heavy rain or flooding to make sure it's still in good working order.
There are two main types of sump pumps: pedestal and submersible. A pedestal sump pump sits above the sump pit and uses a long shaft to connect to the impeller, while a submersible sump pump sits in the sump pit and the motor is sealed to protect it from water damage.
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.