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mystery pipe stub??
jpf321
Member Posts: 1,568
can someone explain why the rads in this old schoolhouse in brooklyn have a mystery stub (white 90deg elbow) near the supply valve? it's open ended. the school is 1-pipe steam. presumably this pipe used to do something else previously. any ideas?
1-pipe Homeowner - Queens, NYC
NEW: SlantFin Intrepid TR-30 + Tankless + Riello 40-F5 @ 0.85gph | OLD: Fitzgibbons 402 boiler + Beckett "SR" Oil Gun @ 1.75gph
installed: 0-20oz/si gauge | vaporstat | hour-meter | gortons on all rads | 1pc G#2 + 1pc G#1 on each of 2 mains
Connected EDR load: 371 sf venting load: 2.95cfm vent capacity: 4.62cfm
my NEW system pics | my OLD system pics
NEW: SlantFin Intrepid TR-30 + Tankless + Riello 40-F5 @ 0.85gph | OLD: Fitzgibbons 402 boiler + Beckett "SR" Oil Gun @ 1.75gph
installed: 0-20oz/si gauge | vaporstat | hour-meter | gortons on all rads | 1pc G#2 + 1pc G#1 on each of 2 mains
Connected EDR load: 371 sf venting load: 2.95cfm vent capacity: 4.62cfm
my NEW system pics | my OLD system pics
0
Comments
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Perhaps,
the pipe may have gone thru the legs of the rads and picked up the air discharge of a Paul style vent..maybe..gwgillplumbingandheating.com
Serving Cleveland's eastern suburbs from Cleveland Heights down to Cuyahoga Falls.0 -
Johnson control system perhaps?
Are there any signs or remants of a pneumatic control system? Is there a non operational room thermostat, or a blank plate where one once was? Any more signes on 1/8 pipe running around the building, perhaps originating from a location where there might have been an air compressor?
Johnson Control did use snap acting thermostats up through the 1930s. They sent 20 psi or air pressure down 1/8 iron pipe to close the radiator supply valve. These did not operate as proportional control as most pneumatic controls do today, but rather, a simple on/off control. When the the thermostat would call for heat, it would suddenly release the pressure from the line running to the valve operator heat, and it made a very audible hiss that lasted about 5-10 seconds. A spring in the valve operator would cause the valve to open.
Just a possibility.....as these systems were often installed in public buildings.Dave in Quad Cities, America
Weil-McLain 680 with Riello 2-stage burner, December 2012. Firing rate=375MBH Low, 690MBH Hi.
System = Early Dunham 2-pipe Vacuo-Vapor (inlet and outlet both at bottom of radiators) Traps are Dunham #2 rebuilt w. Barnes-Jones Cage Units, Dunham-Bush 1E, Mepco 1E, and Armstrong TS-2. All valves haveTunstall orifices sized at 8 oz.
Current connected load EDR= 1,259 sq ft, Original system EDR = 2,100 sq ft Vaporstat, 13 oz cutout, 4 oz cutin - Temp. control Tekmar 279.
http://grandviewdavenport.com0 -
pneumatic control system?
They had that in my grade school, back in the 1940s. Just as you describe. They had three or four coal-fired downdraft boilers, but IIRC they ran only two or three at a time, depending on the weather in Buffalo, NY. A friend of mine had the license to run those boilers. They produced no visible smoke when he ran them, but after he retired, they smoked a whole lot.0 -
thanks all
thanks all for the considerations .. i won't be back over that way for a few weeks .. i'll see if I can poke around a bit deeper when I am.1-pipe Homeowner - Queens, NYC
NEW: SlantFin Intrepid TR-30 + Tankless + Riello 40-F5 @ 0.85gph | OLD: Fitzgibbons 402 boiler + Beckett "SR" Oil Gun @ 1.75gph
installed: 0-20oz/si gauge | vaporstat | hour-meter | gortons on all rads | 1pc G#2 + 1pc G#1 on each of 2 mains
Connected EDR load: 371 sf venting load: 2.95cfm vent capacity: 4.62cfm
my NEW system pics | my OLD system pics0
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