29
Backflow Preventer Maintenance
The strainer portion of the backflow preventer must be removed and cleaned on an annual basis. To clean the
device, turn off the water supply and unscrew the filter housing as shown in the figure. Clean any debris and
replace the strainer. Turn the water supply back on when finished.
Rear seal
Front of barrel with faceplate and
beater bar removed
Unscrew cap and remove strainer to clean
Summary of Contents for 77 Series
Page 1: ...772 773 774 24 2396 0001 Rev C 07 30 2013...
Page 38: ...38 772 Mounting Dimensions 773 Mounting Dimensions...
Page 40: ...40 WIRING SCHEMATIC DIAGRAM...
Page 41: ...41...