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RPZ Backflow Preventer

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ChillerTheatre

ChillerTheatre

Mechanical
Joined
Feb 9, 2006
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2
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US
If I have an RPZ backflow preventer with an air gap fitting, does that serve as the air gap and I can pipe the fitting to a trap and sewer or do I still need to have another air gap at the bottom to a drain?

If it doesn't serve as the air gap, what is the point of the air gap fitting?
 
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