O-S Fitting

Henry

The Northern Electric building had a one pipe gravity system for its 8 floors. The heated water would go to the top floor ceiling and spread out along the outside walls. There would be a pipe going down which would have two O-S tee (like monoflow) for each radiator on each floor. Each down main one would connect to a large return going into the boiler room building which was adjacent to the U shaped main building. As it was converted to multi use rental units, I installed Danfoss thermostatic valves on the radiators by moving them 10 inches from the O-S tee.

STEVEusaPA

Come on Henry, you're not new here...where are the inside pictures...:)

Henry

I did have a picture of the TY somewhere, but could not find it this morning.

delta T

I once found on of the 'Unique' valves made by honeywell, Trying to find a pic for it now....we'll see. P.29 in Classic Hydronics.

Steamhead

For those who don't remember, Northern Electric was the Canadian manufacturing unit for Bell Telephone, like Western Electric was for AT&T in the U.S. That building is probably built as well as the equipment that was made there. NE morphed into Northern Telecom, which collapsed recently.

DanHolohan

This is why I love you guys.

Erin Holohan Haskell

DanHolohan said:

This is why I love you guys.

Ditto!