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How to winterize Watts Control Unit backflow preventers?
To winterize Watts Control Unit backflow preventers, wrap electric heat-tape closely together around the valve body. Alternatively, build a small shelter around the valve with a large light bulb installed and left on at all times. If the supply line is not used during the winter, remove the complete body to create an air gap and eliminate any possible backflow.
Why does Watts 909 valve exhibit high pressure drop?
A high pressure drop in your Watts Control Unit valve may be due to a fouled strainer. Try cleaning the strainer element or replacing it. Alternatively, the valve might be too small for the flows it's encountering; in this case, install a device of the proper size based upon your flow requirements.
What to do if Watts Control Unit valve spits periodically from the vent?
If your Watts Control Unit valve spits periodically from the vent, it could be due to fluctuating supply pressure. To resolve this, install a soft seated check valve immediately upstream of the device. Another cause could be fluctuating downstream pressure, in which case you should install a soft seated check valve downstream of the device as close as possible to the shutoff valve.
What to do if Watts 909 Control Unit valve quickly and repeatedly fouls following servicing?
If your Watts Control Unit valve quickly and repeatedly fouls following servicing, the debris in the pipeline may be too fine to be trapped by the strainer. To fix this, install a finer mesh strainer element in the strainer.
What to do if no water flows downstream of Watts 909 Control Unit valve?
If no water flows downstream of your Watts Control Unit valve, it's possible that the valve was installed backwards. Ensure you install the valve in accordance with the flow direction arrow.
General| Series | 909 |
|---|---|
| Category | Control Unit |
| Body Material | Bronze |
| Connection Type | Threaded |
| Temperature Range | 33°F-180°F |
| Size Range | 1/2" - 2" |
| End Connections | Threaded |
Covers fundamental guidelines for installing the backflow preventer, including location considerations.
Details specific requirements for placing the backflow preventer for optimal performance and accessibility.
Explains the functional mechanism of the reduced pressure zone assembly and its relief valve.
Specifies requirements for installing the device within indoor environments, ensuring accessibility.
Covers guidelines for installing the device outdoors, including protection against freezing conditions.
Details parallel installation methods and the importance of consulting local codes and approvals.
Provides a comprehensive guide for testing the reduced pressure assembly's operational integrity.
Details the procedure to test the tightness of the second check valve against reverse flow.
Outlines the method to verify the tightness and functionality of the second shutoff valve.
Describes the process for testing the tightness of the first check valve against reverse flow.
Explains how to test the operation of the pressure differential relief valve.
Step-by-step guide for servicing the first and second check valves, including component identification.
Instructions for servicing the relief valve assembly, including disassembly and reassembly of parts.
Provides solutions for common problems encountered with backflow preventers, such as spitting or leaks.
Details the product warranty terms, limitations, and customer rights.
