RPZ Horizontal Installation

[texanman]

RPZ requires horizontal installation. Most of the lease finish-outs don't have space allocated for this install. Is above the ceiling acceptable and ok location?
Thanks.

 

[PEDARRIN2]

You are incorrect in stating that an RPZ requires horizontal installation. There are several rated rpz that are allowed to be vertical.

Go to

http://www.asse-plumbing.org/Seal/1013.html

for a list of which backflow protectors are rated for vertical flow.

If the rpz is small(~1" or less), above the ceiling can be worked - I wouldn't do it because you still have to drain the relief so you will have a pipe coming out of the ceiling to the drain