Inspected double check backflow preventer: failed for 1st check valve (below 1 psid). 1.5” Watts LF007M2QT Advised to have a plumber replace the #1 check valve, or replace the device, and then retest.
Inspected 2” rpz backflow preventer: passed
Inspected 2” rpz backflow preventer: passed.
Commercial Backflow preventer inspections
