How do you actually know if there is air in your pipes?


  #1  
Old 02-01-19, 05:38 PM
M
Member
Thread Starter
Join Date: Oct 2013
Posts: 41
Upvotes: 0
Received 0 Upvotes on 0 Posts
How do you actually know if there is air in your pipes?

A guess a big pocket a might cause a section of baseboard to not get hot but what if there is some air but not enough to stop the flow?
 

Last edited by m3ath3ad; 02-01-19 at 06:34 PM.
  #2  
Old 02-01-19, 06:25 PM
PJmax's Avatar
Group Moderator
Join Date: Oct 2012
Location: Jersey
Posts: 63,041
Received 3,593 Upvotes on 3,222 Posts
Most people know because they can hear the water gurgling in the pipes.
Others know when a particular zone doesn't work because it's airbound.

A little air won't hurt anything and eventually should work its way out of the system.
 
  #3  
Old 02-01-19, 06:46 PM
M
Member
Thread Starter
Join Date: Oct 2013
Posts: 41
Upvotes: 0
Received 0 Upvotes on 0 Posts
It just seems like if everything else is working, some tech repair guys just say there is air in the system. I got quoted $800 to purge and change the expansion tank. I declined obviously and did it myself. I changed out the expansion tank but it wasn't water logged and still has 12psi when I pulled it out of the sytem. It was during this crazy polar vortex, so it felt better doing anything even though it might just be my old house is too drafty to handle -40
 
  #4  
Old 02-02-19, 03:17 AM
S
Member
Join Date: Jan 2017
Location: USA
Posts: 447
Upvotes: 0
Received 14 Upvotes on 11 Posts
Can you give a description of the problem you are having and the type of system you have?
 
  #5  
Old 02-02-19, 09:15 AM
PJmax's Avatar
Group Moderator
Join Date: Oct 2012
Location: Jersey
Posts: 63,041
Received 3,593 Upvotes on 3,222 Posts
it might just be my old house is too drafty to handle -40
Yes..... that is a problem. The extreme cold can tax many heating systems that weren't designed to deliver enough heat to counteract temps that low. You need to look into stopping the drafts.
 
  #6  
Old 02-02-19, 09:21 AM
S
Member
Join Date: Oct 2013
Location: United States
Posts: 2,729
Received 132 Upvotes on 124 Posts
If you have some air in your system you may hear a little water movement like rushing water or maybe some pinging. If system is air free you shouldn't hear anything. Depending on your system design, enough air could stop water circulation and must be purged. Air of any significance will not work its way out of a closed system by itself.
 
 

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