The P372LE51 sewage ejector package from Liberty Pumps is designed for both residential and light commercial applications. Plus, you'll want to make sure you choose a company with a reputation for excellence and a great customer service record. They help keep water away from your basement and crawlspace. Having a sump pump installed is a simple process, but it can take eight to ten hours to complete. You can also install a battery backup for the system, which can be used in case of power outages. Finally, it's time to plug in the pump. It is important to have it replaced regularly. Your pit should be at least 22 inches deep.