37X INSTALLATION & OPERATION MANUAL
372/373 MODELS
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9.3 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 (Figure 9.2). Clean any debris and replace the strainer. Turn the water
supply back on when finished.
Figure 9.2 Backflow Preventer
Unscrew Cap and Remove
Strainer to Clean
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