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Old 09-25-2013, 08:29 PM
jbell36 jbell36 is offline
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Join Date: Feb 2008
Location: KANSAS
Posts: 1,218
3/4" Backflow or 1" Backflow? GPM

we do mostly residential installs and i was thinking what the difference between a 3/4" and a 1" double check backflow assembly was? most all of our installs are on 5/8" meters and that is at a flow rate of about 10-12 GPM...if i remember correctly, isn't a 3/4" double check capable of about 20 or more GPM?

my question is, would it make more sense to use a 3/4" instead of a 1" in this situation for these reasons:

1). cheaper
2). fits in a box easier, not as crammed as a 1"

am I missing anything?
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