gravity system

Steamhead (in transit)

you used the wrong column. The 17 GPM was for a modern system designed for forced circulation, without all the extra water in old gravity pipes. I would have used the NRF-33 or Taco 0010 on that system.

But if it's working for you, don't change it!

Adam_12

Replacing boiler for gravity system

What would be the best way to pipe a replacement boiler to a gravity system?.

kevin coppinger_4

see ....

the heating Q&A section at the upper left...kpc as Dan says..."wander off the wall" kpc

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Steamhead (in transit)

And

pay close attention to the size of the circulator. Go here for more:

http://www.heatinghelp.com/newsletter.cfm?Id=125

greg_7

I just looked up that article. You know its funny that I did a circulator switch to a NRF-22 on my gravity system from an older P series 1 1/4 (I don't remember exactly, but I think that's right).

What a difference. I have about 1,100 EDR and the spec on the chart is just under 17 gpm. The NRF-22 filled the bill. And it really works well. It heats much faster.

I recommend it.