A backflow preventer is used to protect water supply from contamination from getting into your home. There are different types of backflow prevention instruments, some of them have ports so they are able to be tested or checked to guarantee that they are functioning the way they should. A check valve is the most common type of backflow preventer. A check valve is a mechanical device that lets fluids or liquid or gases to flow through in one direction. Check valves can have two ports, one where the fluid enters and one where the fluid leaves.
Backflow preventer does protect the drinking water system from any type of minor, moderate or even serious hazards. Backflow devices must be installed to the state you are living in code. The backflow has to have test cocks and shut off valves and they must be tested each year. You can have a plumber come out an check your homes backflow preventer. If you do not have the backflow checked, you are possibly allowing bacteria and other harmful things into your water supply which could make you very sick or worse.
You may need or want to have the backflow preventer replaced if the one that has been in there has been around for 10 or more years. Sometimes, when a qualified inspector comes to test the backflow preventer they find one so old that is was not up to code when it was installed or they may find one so corroded that it is not safe to have it in the system anymore. So they may need to be replaced.
If you do need a new backflow instrument then ask if it can be from one of these top companies. You only want the best and you also want it up to code. Make sure when you hire someone to test the backflow that they are qualified because if you do need to replace the device, you want someone who knows the codes and will do a great job. After all, this is for your drinking water that not only do you drink it but your kids drink it as well. So you want to make sure that everything goes well with your backflow preventer.
Here are some of the best names in the business. Conbraco Industries, Cross Brothers Inc, Febco, Flomatic Corporation, Hot Box, Orbit Irrigation, Toro Company, V.I.T Strong Box and the best name is the business is Watts Industries in Canada and Watts Regulator Co.