Backflow preventer on low pressure side of reducing valve

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coalkirk
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Post by coalkirk » Wed. Dec. 19, 2018 12:44 pm

Question for the plumbers on the forum. My son's father in law is installing a gas boiler I their home in Wisconsin. New installation. I just saw a picture of the boiler and a few devices he has installed already. I noticed he has the backflow preventer after the pressure reducing valve. He doesn't take criticism very well so I'm hesitant to say anything. I know that it is wrong but will it still work?

 
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Post by McGiever » Wed. Dec. 19, 2018 2:23 pm

Besides criticism how is he towards plumbing codes?

Or...maybe they're both seen as the same?

 
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Post by coaledsweat » Wed. Dec. 19, 2018 3:08 pm

It will work either before or after. It really depends on the local code.


 
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coalkirk
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Post by coalkirk » Wed. Dec. 19, 2018 3:30 pm

McGiever wrote:
Wed. Dec. 19, 2018 2:23 pm
Besides criticism how is he towards plumbing codes?

Or...maybe they're both seen as the same?
He's a "we don't need no stinkin' code" kinda guy.

 
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coalkirk
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Post by coalkirk » Wed. Dec. 19, 2018 3:31 pm

coaledsweat wrote:
Wed. Dec. 19, 2018 3:08 pm
It will work either before or after. It really depends on the local code.
Thank goodness! I didn't really want to tell him it was wrong. I'm pretty sure the manufacturer says on the high pressure side though.

 
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Post by Olllotj » Wed. Dec. 19, 2018 4:49 pm

Wait until he is out of town and the boiler goes down. Your daughter has to make a service call, Repair man either won't touch it or he charges to bring it up to code on top of fixing the reason it went down.


 
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coalkirk
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Post by coalkirk » Wed. Dec. 19, 2018 8:26 pm

I look at lots of boilers in the course of my job and probably 75% don't even have a backflow preventer. A new installation should be done correctly though. I just wanted to know of the valve would function under the low pressure.

 
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Post by CapeCoaler » Sat. Dec. 22, 2018 11:28 pm

Watts has the combi unit with back flow on high pressure side...
https://www.supplyhouse.com/Watts-0386463-B911-1- ... hsQAvD_BwE

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