air eliminator for hydronic system

Reply

  #1  
Old 03-12-12, 11:53 AM
Member
Thread Starter
Join Date: Dec 2010
Location: USA
Posts: 332
Received 0 Votes on 0 Posts
air eliminator for hydronic system

i tried to search for the answer to question on this forum, but didn't find a exactly what i'm looking for.

it seems that there are multiple designs for air removal devices for closed loop hydronic system (looking at pex supply web site):

Air Eliminators , Taco Air Scoops , Spirovent Air Eliminator - PexSupply.com

do all of them perform the same function? can either of them be used in residential hydronic systems?

is there specific type/model that is preferred on this board?

thanks!
 
Sponsored Links
  #2  
Old 03-12-12, 02:06 PM
lawrosa's Avatar
Super Moderator
Join Date: Dec 2010
Location: Galivants Ferry SC USA
Posts: 17,962
Received 37 Votes on 32 Posts
They all try to perform the same job to remove trapped air. Some are better then others. Some are just a wing inside to disturb the air bubble and deflect it up to the top where the air vent releases it.

http://www.pexsupply.com/Taco-400-4-1-8-Hy-Vent

O
thers are scrubber types that have a type of coil spring inside to separate the air better. They have air vents attached to them also.

A lot of older installs don't have the air scoops and just have air vents at high points in the system to purge the air out.

http://www.pexsupply.com/Air-Valves-300000

M
ike NJ
 
  #3  
Old 03-12-12, 03:28 PM
NJT's Avatar
NJT
NJT is offline
Member
Join Date: Oct 2006
Location: USA
Posts: 23,539
Received 3 Votes on 2 Posts
One of our esteemed members recently brought up a good point about the Taco 'Vortech' unit. Since the air vent screws down into a 'well' on top, they can leak and corrode for a long time without being detected.

I think either the Spirovent or the Taco 4900 would be my choices.
 
  #4  
Old 03-12-12, 08:01 PM
Member
Join Date: Nov 2011
Location: USA
Posts: 418
Received 2 Votes on 2 Posts
One of our esteemed members recently brought up a good point about the Taco 'Vortech' unit. Since the air vent screws down into a 'well' on top, they can leak and corrode for a long time without being detected.
Interesting. I'll have to keep an eye on that. I have a Vortech unit on my home system. Fortunately, it's mounted only about waist high, so it's easy to view the top.

A major advertised benefit of the Vortech (aside from removing air quicker than a conventional air separator) is that you don't need a minimum pipe run into it nor out of it, which of course is useful in tight quarters. That is, in fact, a big reason why I chose it.

 
  #5  
Old 03-13-12, 05:46 PM
Member
Thread Starter
Join Date: Dec 2010
Location: USA
Posts: 332
Received 0 Votes on 0 Posts
guys, thank you for your replies.

one more question. if a boiler has 1-1/4" water connections and hydronic system has 3/4" pipes all around, I assume things like air eliminator supposed to be sized to match water connection of the boiler? does it matter at all?
 
  #6  
Old 03-14-12, 08:29 AM
Member
Join Date: Oct 2008
Location: USA
Posts: 2,922
Received 8 Votes on 8 Posts
Doesn't matter - except either way, you will need to tee it down to the size of the air eliminator connection, so starting from 3/4" would be easier.

I assume you have a bladder-type expansion tank, as opposed to a conventional steel tank. With the conventional tank, no air eliminator should be installed - it will cause the tank to become waterlogged.
 
Reply

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread
 
Ask a Question
Question Title:
Description:
Your question will be posted in: