Zoeller pumps, made right in Louisville, are awesome. Have you gone as crazy as me: calculating the volume of water removed w each pump run? In the worst storms it was pumping 1500 gallons/ hour, turning on every 12-15 seconds. I knew my crappy Home Depot battery backup wouldn’t keep up in that case. So I had a company, The Basement Doctor, install a bigger pit that has 3 pumps. One is the main. Second is if first one fails or can’t keep up (goes to separate pvc pipe). Third is a marine battery capable of discharge 10,000 gallons. Overkill? Maybe. But I’ve slept better ever since.