Manifold piping?

Jamie Pompetti

When you guys install your radiant maifolds do you pipe them reverse return?

Mark Hunt

I do.

Mark H

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Mark Eatherton1

I use...

the "Hand Full" rule. If there are more than five branch circuits (5 fingers = a hand full) then I do reverse return, when possible. Sometimes structural preclusion pervaids it.

ME

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bill_8

reverse return?

what do you mean by reverse return?

Steve Ebels

You pipe it so

The first zone or loop off your main is the last one to get back to the boiler. Simply put, your supply side goes out as normal but the return piping would start at the point of your first supply, proceed to the last, then go back to the boiler. Scanner is broke so I can't send a drawing. Sorry

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Mark J Strawcutter

why?

The radiant manifolds I've seen are short enough that the pressure difference from one end to the other should be pretty small. Does it really make a difference?

Mark

Mark Eatherton1

Reverse versus direct return

Here's some drawings that will hopefully clear it up.

ME

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Mark Eatherton1

It depends...

If we're talking a brass Wirsbo manifold, probably not. If were talking a 3/4" man made manifold, it could...

ME

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Jamie Pompetti

It is a wirsbo manifold!!!!!!!!!!

It has 8 loops and they range between 215 to 230 feet.

Earthfire

manifold flow

I'd use reverse return . Can't go wrong with it on a manifold that long.