Back Flow Preventer, 1/2-In. FPT

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In stock
Model #
9D-M3 1/2
Item #

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In stock
1/2" female pipe thread union inlet x 1/2" female pipe thread union outlet, dual check backflow preventer, with intermediate atmospheric vent, typically installed on boiler feed lines to prevent backflow caused by back siphonage or back pressure, for systems without antifreeze, rust inhibitors or other chemicals which will contaminate the potable water system, asse & csa certified.
SKU 733156
Weight 4.0000
UPC 00098268221794
Country of Origin US
Package Width 2.5
Package Length 3.3
Package Height 2.0
Model Number 9D-M3 1/2
Manufacturer Name Watts Water Technologies
California Residents Proposition 65 Warning: This product can expose you to chemicals including lead which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to
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