Need 2" Pipe Insulation

Reply

  #1  
Old 01-06-14, 10:19 AM
R
Member
Thread Starter
Join Date: Nov 2013
Posts: 281
Received 0 Votes on 0 Posts
Need 2" Pipe Insulation

Im looking for that foam pipe insulation but for a 2" pipe (PVC) .... theres a trade name of Armaflex but I cant find what I need.

Do they sell that foam insulation in 2"?

What is the ID size I need for a 2" PVC?
 
Sponsored Links
  #2  
Old 01-06-14, 10:59 AM
chandler's Avatar
Banned. Rule And/Or Policy Violation
Join Date: Dec 2005
Location: USA
Posts: 39,967
Received 4 Votes on 4 Posts
Curious as to why you need such large insulation. The OD of the pipe and fittings would be 2 1/4 to 2 1/2"
 
  #3  
Old 01-06-14, 11:08 AM
R
Member
Thread Starter
Join Date: Nov 2013
Posts: 281
Received 0 Votes on 0 Posts
I dont think that stuff is purchased by OD. It comes in at least 1/2", 3/4" and 1" thickness.

Not really relevant but it would be used on a 2" pvc intake and exhaust of a condensing furnace.

The trade name is Armaflex or Armacell.
 
  #4  
Old 01-06-14, 11:16 AM
chandler's Avatar
Banned. Rule And/Or Policy Violation
Join Date: Dec 2005
Location: USA
Posts: 39,967
Received 4 Votes on 4 Posts
Armaflex 2 1/2" x48' long $169 at big orange.
 
  #5  
Old 01-06-14, 11:26 AM
Gunguy45's Avatar
Super Moderator
Join Date: Dec 2007
Location: USA
Posts: 21,119
Received 3 Votes on 3 Posts
I swear I saw something in a thread about manufacturers recommending NOT insulating those lines? Don't hold me to that though.

Oops...maybe I mis-remembered.
Here's an excerpt from a manufacturers manual I grabbed from another site. Don't know which manufacturer.
Vent Freezing Protection
When the vent pipe is exposed to temperatures
below freezing, i.e., when it passes through
unheated spaces, chimneys, etc., the pipe
must be insulated with 1/2 inch thick sponge
rubber insulation, Armafl ex-type insulation or
equivalent. Insulating pipe is important to avoid
condensate icing.
For extremely cold climates or for conditions of
short furnace cycles (i.e. set back thermostat
conditions) the last three feet of vent pipe can be
reduced one nominal pipe size provided that the
total vent length is at least 15 feet in length and
the vent is sized in accordance with the venting
requirements (Table 5) before this reduction is
applied. (Example: 3 to 2-1/2 or 2 to 1-1/2)
Smaller vent pipes are less susceptible to freezing,
but must not be excessively restrictive.
Any HVAC supply house should be have or be able to get what you need....if they sell to non-Pros.
 
  #6  
Old 01-06-14, 12:14 PM
lawrosa's Avatar
Super Moderator
Join Date: Dec 2010
Location: Galivants Ferry SC USA
Posts: 18,139
Received 55 Votes on 48 Posts
Armaflex 2 1/2" x48' long $169 at big orange.

Im sure thats for a whole carton....
 
  #7  
Old 01-06-14, 01:07 PM
R
Member
Thread Starter
Join Date: Nov 2013
Posts: 281
Received 0 Votes on 0 Posts
Those cartons at Evil Orange are all I can find too... theres no single lengths on their website.
 
  #8  
Old 01-06-14, 01:10 PM
Gunguy45's Avatar
Super Moderator
Join Date: Dec 2007
Location: USA
Posts: 21,119
Received 3 Votes on 3 Posts
What about an HVAC store or Grainger?
 
  #9  
Old 01-06-14, 01:55 PM
lawrosa's Avatar
Super Moderator
Join Date: Dec 2010
Location: Galivants Ferry SC USA
Posts: 18,139
Received 55 Votes on 48 Posts
Call your local Ferguson.........

Locations Finder
 
  #10  
Old 01-06-14, 02:22 PM
R
Member
Thread Starter
Join Date: Nov 2013
Posts: 281
Received 0 Votes on 0 Posts
You guys are right, going to have to find an HVAC supplier... we don't have any of the ones you suggested around here, but some of the contractors have parts dept's... maybe that's where I have to go.

Its Armaflex APT20034 with a 2" IPS (not sure what IPS is).

Its only sold by the case online though.

Have any of you ever seen this under a different brand name? Maybe that's the route I need to take or find an alternate material.....
 
  #11  
Old 01-06-14, 02:40 PM
Gunguy45's Avatar
Super Moderator
Join Date: Dec 2007
Location: USA
Posts: 21,119
Received 3 Votes on 3 Posts
I think Graingers brand was Thermoflex...looked to be the same kind of stuff.
 
  #12  
Old 01-06-14, 04:03 PM
R
Member
Thread Starter
Join Date: Nov 2013
Posts: 281
Received 0 Votes on 0 Posts
Ive realized that I probably even use that pre-formed stuff. The pipe exits at the sill plate of my basement. The pipe is perpendicular to the sill so I couldn't wrap that insulation around it. Also the ells are right there too, they need to be insulated, I probably need something else.... perhaps a tape.


What other insulation material can I use here?
 
  #13  
Old 01-06-14, 04:09 PM
lawrosa's Avatar
Super Moderator
Join Date: Dec 2010
Location: Galivants Ferry SC USA
Posts: 18,139
Received 55 Votes on 48 Posts
3" pvc pipe has an OD of 3.5"

Find what you need with an ID of at least that...

There is no R value to that stuff really... May be better with a better solution if you really have a freezing condensate issue....
 
  #14  
Old 01-06-14, 04:45 PM
R
Member
Thread Starter
Join Date: Nov 2013
Posts: 281
Received 0 Votes on 0 Posts
Lawrosa - The pvc is 2" actually, but like I said, the preformed stuff wont work cause I cant get it totally around the pipe.... (just now realizing this). The portion I can get it around are the elbows, so that wont work out so well either.

I have some rolled pipe wrap that has a foil side and a fiberglass side. I could probably get that to wrap around but then I am worried about the fiberglass/condensation moisture issue that would probably occur.
 
  #15  
Old 01-06-14, 05:04 PM
lawrosa's Avatar
Super Moderator
Join Date: Dec 2010
Location: Galivants Ferry SC USA
Posts: 18,139
Received 55 Votes on 48 Posts
I cant get it totally around the pipe....

Why not? There is a split in it... And for the elbows you tape a small split piece to the inside of the ell weher it does not wrap and tape it..

You can get premolded stuff too...

Buy Proto PVC - Zeston PVC - Speedline PVC Fittings 90 45 Degree Elbows Tees Victaulic Flange Coupling Covers Mechanical Groove Sump

Nominal Pipe Size to Outside Diameter of a Pipe Chart - Buy Insulation Products

Fiberglass Pipe Insulation (2" Thickness)


PVC 90 Deg Elbow Cover
 
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 On
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: