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A friend has an outdoor wood furnace going to a building.
He put two
radiators (the old cast iron type) in the lower level and
they heat
well. He put another radiator in the upper floor and that
one will not
fill up. It's only heating the bottom of that radiator. I
opened the
bleeder while it was running, and no air or water comes
out. I then
removed the entire bleeder and still nothing comes out.
There does not
appear to be a clog behind that bleeder.

I am thinking one of two possibilities. Either the pump on
the furnace
does not have enough pressure to lift the water to that
second level, or
else that radistor needs some sort of restriction on it's
OUTPUT side to
force the water to the top of the radiator. Currently he
just has both
pipes going to the radiator, one to the bottom left, the
other to the
bottom right.

(This is a HOT WATER, -NOT- a Steam heat setup).

Anyone have any suggestions?


The outlet should be near the top, not at the bottom.
I would not restrict the flow...no need to....