Recommendation for Air Separator for Base Board Heating System

Old 02-15-16, 06:27 AM
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Recommendation for Air Separator for Base Board Heating System

I have 5 zone Base Board Heating system and Air seems to be getting trapped once in a while and causing some of the zone not working. Every year, I have to bleed the system. Is there any good recommended Air Separator I can use on Hot return side of boiler on 1" inch of pipe which can constantly remove Air if any to avoid and future issue.

What you think of using Spirotherm Spirovent Junior 1" Sweat Connection Air Eliminator 1" VJS100-TM ? It is little expensive.
Old 02-15-16, 08:33 AM
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They are all pretty good. I really like the Taco brand but again they are all good if installed per manufacturers directions. The will work on return but work better on the supply before the circulators.
If installed on the return with expansion tank connected to it it must be on the common return and before the circulators so you are pumping away from the separator and expansion tank connection. This is almost impossible to do. Air elimination is done better on lower pressure which is the incoming side of the pumps and the air bubbles are larger and easier to separate from the water. The hotter the water the better air separation. So best location is supply side of the boiler on the inlet side of the circulators common piping and expansion tank connected to the air separator.
Old 02-15-16, 10:34 AM
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I just kind of have to think what is leaking that is causing a constant need for makeup water which adds air at the same time?

Only time I've had to bleed mine or friends was when we worked on them and then drained/refilled. Maybe I don't notice it as the separators are doing their jobs. Mine and friends are Spirovent, Taco, Taco scoop.

The freinds I helped with air issues had bad air bleeder vents or the top was screwed down. Except the one with ceiling mounted tank that kept wanting to keep the caps open causing it to fill with water.
Old 02-15-16, 01:08 PM
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Yes need more info.. Make and model of boiler.

What type of exp tank do you have?

What the psi on the boiler gauge read?

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