New backflow guidelines for Elgin IL

There is strong migration towards reduced pressure principle backflow preventers and away from double-check backflow preventers across the country. Illinois is no exception. Elgin, Illinois has new backflow guidelines for commercial construction that outlaw the double check backflow preventer on domestic lines. According to a recent amendment dated October 24, 2012, the city now requires reduced pressure zone backflow preventers on all domestic lines for new construction and remodels, as well. Elgin appears to be the first to take these steps.

(1)In all new commercial and industrial construction, each domestic water service shall have a Reduced Pressure Principle Backflow Preventer Assembly (RPZ) installed directly after the city water meter…(2)On any remodeling of commercial or industrial building where a plumbing permit is required, each domestic water wervice shall have a Reduced Pressure Principle Backflow Preventer Assembly (RPZ) installed directly after the city water meter…

Double check outlawed in Elgin Illinois

Expect more of these changes in the near future. The isolation concern is based on the fact that the ubiquitous “double-check” (DC) backflow preventer assembly (BPA), developed in the 1950s for fire lines and integrated into most commercial taps from coast to coast, has no external detection capabilities for alerting a failure. If the check valves fail to activate during back pressure or back-siphon, the delivered and potentially contaminated water will return to the public water supply completely undetected. On the other hand, the newer Reduced Pressure Zone (RPZ) BPA, uses gravity and a hydraulically activated differential relief valve to ensure that no delivered water ever returns to the public supply, even when the check valves fail.

Add Your Comment