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This post has been edited 1 times, last edit by "Wet_Boots" (Sep 15th 2010, 12:07pm)
...As for basement installation of an RPZ, it would only be workable in an industrial environment, in a room with a high-capacity floor drain that can handle the entire incoming flow of your home's water supply (in the event of an internal fault in the RPZ)
RPZ must be installed in an above ground "out doors" location. However, unlike a AVB or PVB, the elevation of the RPZ relative to the sprinkler heads does NOT mater.
As for the valves on each end of the device? That's so the certified technition can test the device in-place.
it does need to be connected to a drain. It needs to have 12" of elevation from floor to device. The handles on the device need to be functional or positioned so they can be opened and closed. The Test Cocks need to have room or 6" or so of clearance to connect the pressure differential guages to.
RPZ must be installed in an above ground "out doors" location. However, unlike a AVB or PVB, the elevation of the RPZ relative to the sprinkler heads does NOT mater.
As for the valves on each end of the device? That's so the certified technition can test the device in-place.
Can someone give me a backflow device type and associated manufacturers that would be safe to use in the basement. As I understand it there are 5 types:
1. Air-Gap
2. Atmospheric (non-pressure) Type Vacuum Breaker
3. Pressure Vacuum Breaker {PVB}
4. Double Check Valve Assembly {DC}
5. Reduced Pressure Principle Assembly {RP}
I will take this information back to the town to see what they have to say about it. I will ask them about written codes such as ASSE 1013.
Relative to testing, I definitely want to leave that up to the experts; but, I am wondering if the backflow device has to be installed in such a way to allow the expert to test it or are there test ports built in to all backflow devices.