pex-al-pex with cast iron

antman

Was wondering about thoughts on using 1/2" multicore to supply cast iron radiators to a second floor, they are currently being supllied with 3/4" black and I have to relocate risers into the wall. I have used it on copper convectors and it worked great.
Any thing different with the high mass cast iron radiators that would make it not recomended.

Thanks, Ant

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hot_rod

If you can

move enough btu's through the 1/2". 5/8 or 3/4" may be needed depending on the load and length of runs. Might consider a home run approch to each location. Try this link for ideas.

hot rod

http://www.pmmag.com/CDA/ArticleInformation/features/BNP__Features__Item/0,2379,23759,00.html

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Dave H_2

Follow some design parameters

take a look at the following attachement.

It will give some idaes to designing what size tube to use and the possibility of using a manifold setup like Siggy describes.

Dave H.

Dave Yates (PAH)

Works great!

We did exactly that in a very large mansion this past year in order to convert from two-pipe steam (sorry MD) and offer up multiple zoning with multiple remotely injection panels. A number of those panels then include telestats for room-by-room zoning. The Viagra PEX runs (especially in basement hallways where it is exposed to view) hold their shape quite nicely.

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[Deleted User]

Dave.

Are you sure that was the brand of PEX you used? If so, bending it must be an excruciating experience.

Dave Yates (PAH)

precautions where well water is utilized

Absolutely, however if you're filling the system with well water that has a high iron content, the piping tends to orient itself in a northernly direction!

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Brian (Tankless) Wood

Hard stuff to bend

once it's been treated with the new VIAGRA anti-flexing treatment :O)

Does it need heat to get the kinks out.

Couldn't resist.

Tankless in Swampland.

ScottMP

How long does it

Mantain its rigidity and when is another treatment necessary ?

I find I get the same results with alcohol but the performance decrease's.

Scott


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Dave Yates (PAH)

we use

hangars with female threads! As long as you maintain a slight distance, there can be no mating of the surfaces & the rigidness remains in tact.

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antman

Thanks for the tips?

> hangars with female threads! As long as you

> maintain a slight distance, there can be no

> mating of the surfaces & the rigidness remains in

> tact.

>

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antman

Hmmm?

Thanks Dave, I think!

;-)

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