Don't they serve two distinctly different purposes? How could a PRV serve as backflow prevention or how could a DC reduce pressure?
If you are installing a Reduced Pressure Principal Device at the same location as an existing dual check (way overkill) the dual check would be redundant (not needed).Is it overkill to install a Pressure Reducing Valve AND and a Dual Check Valve in the same line?
Or can the Dual Check be removed, the Pressure Reducing Valve installed in place of it.
Given that some homes are required Dual Checks by authorization of local backflow prevention programs.
Is this a correct substitute.
I understand most check valves are dual, but decipher where it reasons both devices on the same line.
I read it as PRV not RPZ..If you are installing a Reduced Pressure Principal Device at the same location as an existing dual check (way overkill) the dual check would be redundant (not needed).
You might be right I just couldn't figure out why they would be listed together.I read it as PRV not RPZ..
But how is a dual check a double check?I'm reading it as PRV and double check.........
Actually a Watts L7 is testable but I still consider all dual checks disposable.
A dual check is non-testable. They are required by MOST municipalities. Most are in the meter loop itself.
A double check is a testable device.