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The WATTS BD911S-M3 is a combination valve designed for boiler feed tasks. This unit integrates a backflow preventer with a dual check feature and an atmospheric vent. The construction is made from bronze and includes union solder and female NPT end connections. It is pre-assembled for installation and is suitable for both horizontal and vertical applications.
Supports filling of boiler systems while protecting against backflow.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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