Radiant heat air elimination

Tory

I have a 3 zone, closed system with a Spirovent air eliminator. I also have 2 water filters on the incoming water supply line before my water heater.

After I change the filters, I sometimes have air get trapped in the pex tubing on the automatic fill line just before the Spirovent. This kept water from entering the system as needed. The Spirovent didn't get a chance to do its job.

Is there a way to prevent this? Do I need to install a manual bleeder valve on this line so this won't keep happening?

BTW, I have to turn off my house water to change the filters.

Al Letellier_9

air bound

Not sure what you configuration is, but form your description, it sounds like the auto fill valve to the boiler. It has an internal check valve that may be leaking by when you drop the pressure. Try shutting off the boiler fill valve ( before the auto fill) and see if that eliminates the problem.

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Tory

air trapped in the auto fill tube

Actually, the auto fill tubing goes straight into a valve of some kind between the expansion tank and the Spirovent.
I don't know what this is, but there is no way to do anything with that.
The line from the spirovent enters the Thermolec boiler case.

There is no boiler fill valve before the auto fill tube.

Help!!!! :>))))

Tory

Ron Schroeder

Share a pic it could be worth a thousand words

Tory

Radiant heat - air trapped in auto-fill tubing

Well, Hey! This is the first time I've attempted to scan a Polaroid picture, or anything. Don't have a digital camera. I hope you can see it.

A large amount of air was trapped in the tubing that enters just above the expansion tank. That is the incoming water for what is a closed system.

The shut-off valves for the water filter loop don't make sense to me. I'm not a plumber, just a retired home builder/remodeler who tries just about anything - sometimes successfully!
It seems to me that the shut-off valve on the vertical incoming pipe should be before the filters, not after. Plus, the water for the auto-fill tube to the boiler comes from the cold side of the water heater. Can someone explain to me why I HAD to have an 80 gallon tank for the radiant heat system when the water comes from the cold side? Doesn't make sense.

So, how do I get rid of that trapped air? and, where do I put a manual air bleed? I have to shut the water off to change the filters (about every 6 weeks, with luck).

Thanx,

Tory

singh

nice electric boiler

move the pump to the supply side.

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