Got a leak - old hot water heating baseboard

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Old 05-31-14, 12:54 PM
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Got a leak - old hot water heating baseboard

Can you identify this part? Is it a air release valve? It is cracked on the bottom. Where can i buy it?
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Old 06-01-14, 09:18 AM
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Where was this part located in the system?

If I had to guess ( and I do ! ) I would say that it looks more like a water hammer arrestor.

I wonder why the flare fitting? Not necessary for water.
 
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Old 06-03-14, 05:41 PM
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And a compression fitting on the bottom? 35 plus years inna bizness and I've never seen that thang.
 
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Old 11-04-15, 06:26 AM
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It is an air bleeder valve. The missing part on the flare fitting was a cap with holes drilled in the sides for manual air bleeding. The unit was installed with the accumulator horizontal as shown in the picture. Air accumulating in the body could be bled by loosening the cap on top. You can remove the compression fitting on the baseboard, install a bushing and 1/8" coin vent.
 
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