The answer to 'difference between backflow preventer' is that a backflow preventer is a plumbing device that prevents the reverse flow of water or other liquids, gases, or suspended solids from entering the public water supply or the homeowner's plumbing system. This is important to prevent contamination and ensure safe, clean water. Backflow preventers come in different types and sizes depending on the application, such as reduced pressure zone (RPZ) backflow preventers for high-hazard situations or double-check valve assemblies for lower-risk applications.
Backflow preventers are required by plumbing codes in many areas to protect the public water supply. They are typically installed at the water meter or where the main water line enters the home. Regular testing and maintenance is important to ensure the backflow preventer is working properly and not allowing any reverse flow.