Unless you live in a pretty rural area, your home is probably connected to a sewer system. And if you've ever had one, you know that a sewer backup is positively horrible. Not only are sewer gases foul-smelling, but they are also actually toxic. Backwater valves are prevention devices that prevent sewer backups that can cause human waste to pour out of your toilets and drains. Knowing how to install a backwater valve will keep you much safer.
