The preventer sits in between the two pipe sections, connected to them with 90-degree angle pipe connectors. The sewer backflow preventer itself may have a shut-off valve handle or a ball valve on it.

ANN ARBOR, Mich. – As of January 1, 2010, new lead content requirements in California (commonly known as AB 1953) will mandate a maximum weighted average lead content of 0.25 percent for plumbing ...