Encyclopedia & FAQ's

DIY Frequently Asked Questions / How do I know the correct size of sump pump to install?

If this is a replacement, and the previous one served well for a number of years, you can simply install the same size. If the old one seemed to run too often, you may want to get a slightly larger pump so it doesn’t have to work so hard. If this is for a new installation, 1/3 horsepower will normally handle occasional water flow, while a ½ horsepower will be needed if there is daily water flow.