Backflow bypass

Donny · May 2004

Any RPA members out there have a problem with the article "Pressurization of Closed Hydronic Systems " in the March 2004 Radiant Panel Report? Figure 3 shows a bypass line plumbed in upstream of the makeup water supply valve going around the backflow device, press red valve, and connecting downstream of the isolation valve. I feel the proper location of the supply side of the bypass line should be downstream of the backflow device.

Dave Yates (PAH) · May 2004

You are absolutely correct!

The BFP must be in advance of the by-pass line or the by-pass becomes a cross-connection the has the potential to negate the BFP's protection.

On the other hand, the BFP could be installed as the last device between the PRV, by-pass line and the hydronic water.

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Murph'_5 · May 2004

Anyone can see into the future ......!!

It looks as if Mr Yates posted ten minutes from now, I noticed time slipping on my end last week slightly. Now it seems that this is gettting worse.

It now says 4:37pm

(SORRY TO HIJACK POST<

Murph'

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Ken_8 · May 2004

Mr. Yates has always been

prescient.

He does not like to brag however.

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Backflow bypass

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