where to place backflow preventer

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Old 11-20-08, 06:09 PM
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where to place backflow preventer

Hi,

I'm going to put a backflow preventer on my boiler. I wanted to make sure it went in at the right spot.

I was going to put it just upstream of the gate valve (which is upstream of the sequence: filler valve, bleeder, PRV, and expansion tank).

Is this right?

Thanks for any info.
 
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Old 11-20-08, 06:46 PM
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Backflow Preventer

Put it between the gate valve & the pressure reducing (feed) valve.
 
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Old 11-21-08, 05:38 AM
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Don't forgot to make sure the arrow stamped on the backflow preventer is pointing towards the boiler.
 
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Old 11-21-08, 08:30 PM
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Just wanted to make sure I got it: Grady's talking about "water feed pressure regulator" and not the whole-house pressure reducing valve that's right next to the main water shutoff, right?

So, I should put the backflow preventer just a bit closer to the boiler than the gate.

I will look for the flow direction arrow.

Thanks for the help!
 
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Old 11-21-08, 08:36 PM
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Backflow preventer

Yes, I was referring to the water feed valve for the boiler not the whole house pressure reducing valve. The backflow preventer goes between the shut off valve (gate valve?) & the "water feed pressure regulator" with the arrow pointing toward the "water feed pressure regulator".
 
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Old 11-23-08, 10:42 AM
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Okay. Thanks Grady. I figure I should ask the dumb question (instead of doing the dumb thing).

I didn't want to have a moment like in that Saturday Night Live skit where they're trying to figure out what "you can't add too much water to the nuclear reactor" means...
 
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