Watts, Burlington, Ont, introduced its LF909-FS with SentryPlus alert technology. The integrated flood sensor technology is now standard on all large diameter (2-1/2 inch to 10 inches) Watts 909 backflow preventers. Flood sensors can be activated with add-on cellular or BMS kits.
The sensors are designed to detect discharge from the RPZ backflow w’s relief valve, so action can be taken to prevent flooding. An integrated sensor is pre-installed at the relief valve, directly before the air gap, on all large diameter 909s.