Dunham Air Eliminator 220 B.......parts available?

DanHolohan

Here's the spec sheet. No longer available, though. If it's spitting water, suspect a clogged return.

PG

Dunham air eliminator 220-B.........parts available?

Trying to repair a two pipe, Dunham, steam system. Have two, 220-B air eliminators. Both have air vents screwed into tops. One spits water and steam, the other is cold. Do I just replace the air vents? Or do I also take the bolts out and remove the top of these 220-B's, and see if they are working properly? Should I try cleaning them up? If they are bad are rebuild kits available? If not do I replace with bucket or float and thermostatic traps? And then add main air vents? Thanks for any input!

Steamhead

Since it's spitting steam

you also may have some bad traps. Feel the dry return leading to the 220B. If it's steam-hot, that's your problem. There should be no steam in those dry returns.

Follow the hot return to find the bad traps, and fix them.

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PG

How would you find one or two bad traps...........

if just ONE trap is bad wouldn't that be enough to backfeed and fill all the returns with steam? If so how do you find the bad trap(s)?

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PG

How do you find the bad traps.......

Wouldn't steam backfeed into all the return lines if even just one trap failed in the open position? Is there a sure fire way to find it? Or do you replace them all? How do you convince the customer to replace all of them?

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