Wondering how to install a backflow preventer in your basement? Here are a few tips for you. Turn off the water supply to the area where you'll be working. Measure and cut the pipes as needed to fit the backflow preventer into place. Follow the manufacturer's instructions to assemble the backflow preventer, ensuring the arrows indicating the water flow are correct. Find more tips on this blog https://drainexpress.ca/how-to....-install-a-backflow-