Watts LF919-QT-FS 3/4 - Part of the LF919 Series Z100F-3NH It has 1/2 inch union

It has 1/2 inch union NPT inlet x NPT threaded outlet connections

and provides multi-year protection

It features a cast iron body with aluminum-bronze disc plate

Fits sizes 2 to 3 IN

UV resistant and flexible

Watts LF919-QT-FS 3/4 - Part of the LF919 Series Z100F-3NH It has 1/2 inch unionThis 3 4 inch lead free reduced pressure zone backflow preventer assembly includes a flood sensor with SentryPlus Alert technology to detect water discharges from the relief valve. When activated through an add on sensor connection kit, the flood sensor can send an alert to notify facility personnel about potential flooding. Add on sensor connection kits are available for BMS and cellular communications. This assembly is designed to prevent the flow