"Banging Radiators"

Reply

  #1  
Old 10-13-07, 06:20 PM
Member
Thread Starter
Join Date: Oct 2007
Location: United States
Posts: 62
"Banging Radiators"

Hello. I'm new to this site. Here's my problem: The radiators in my house always bang during and shortly after the boiler is running. I bleed the radiators regurally and sometimes a small amount of air comes out of 2 of them. But other than that no air comes out at all. Any suggesstions? Thanks
 
Sponsored Links
  #2  
Old 10-13-07, 06:30 PM
Member
Join Date: Oct 2007
Posts: 16
Steam or hot water?

Is the system steam or hot water?
 
  #3  
Old 10-13-07, 07:19 PM
Member
Thread Starter
Join Date: Oct 2007
Location: United States
Posts: 62
it's a hot water system
 
  #4  
Old 10-14-07, 06:33 AM
Member
Join Date: Oct 2007
Posts: 16
Originally Posted by kingjim9 View Post
it's a hot water system
Is the boiler staying at a steady pressure?
Is air getting into the system?
Could it be piping in the outside wall? Hot pipes meeting cold air can cause a bang.
 
  #5  
Old 10-14-07, 07:06 AM
Grady's Avatar
Forum Topic Moderator
Join Date: Jan 2005
Location: Delaware, The First State
Posts: 13,928
Noise

By the term "radiators" do you mean cast iron radiators or finned copper tube in a metal cabinet?
 
  #6  
Old 10-14-07, 11:36 AM
Member
Thread Starter
Join Date: Oct 2007
Location: United States
Posts: 62
They're Cast Iron Radiators. And When the boiler isn't running the pressure is about 20psi and after it runs for a cycle it climbs to about 24psi. I'm not sure how to determine if it is getting air in the system.
 
  #7  
Old 10-14-07, 04:15 PM
Grady's Avatar
Forum Topic Moderator
Join Date: Jan 2005
Location: Delaware, The First State
Posts: 13,928
System Pressure

That's a lot of pressure for a house. I doubt the pressure has any thing to do with the noise but I suggest dropping the cold pressure to 12-15# & see if it makes a difference.
 
  #8  
Old 10-14-07, 07:56 PM
Member
Thread Starter
Join Date: Oct 2007
Location: United States
Posts: 62
how should i drop the pressure to 15? Should i just release water from the system?
 
  #9  
Old 10-15-07, 02:25 PM
Grady's Avatar
Forum Topic Moderator
Join Date: Jan 2005
Location: Delaware, The First State
Posts: 13,928
Pressure

There should be one or more hose bibs on the boiler or near the circulator(s). Just open one & drain water into a bucket.
 
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
Display Modes