The answer to 'which is better backflow preventer or' is that a backflow preventer is generally better than a backflow preventer. A backflow preventer is a mechanical device that prevents the reverse flow of water or other liquids, gases, or solids into the potable water supply. This helps protect the water system from contamination.
Backflow preventers are required by plumbing codes in many areas for certain types of water connections, such as irrigation systems, chemical processing equipment, and boilers. They provide an extra layer of protection to ensure clean, safe drinking water. Backflow preventers come in different types and sizes depending on the application, with some more suitable for residential use and others for larger commercial or industrial systems.