Go Back   InterNACHI Inspection Forum > Specific Inspection Topics > Inspecting HVAC Systems

Notices

Inspecting HVAC Systems Topics include heating, venting, and air conditioning inspections.

Reply
 
LinkBack Thread Tools
  #1  
Old 6/22/11, 7:48 PM
William M. Fossier Jr. William M. Fossier Jr. is offline
InterNACHI Member
 
Join Date: Oct 2005
Location: La Marque, Tx
Posts: 9
Default Need code reference for AC condensate drain line

Does the ac condensate line have to be rigid pipe where it attaches to the tail pipe of a vanity. Need code reference
Reply With Quote
Need a home inspection in Pennsylvania? Check out InterNACHI's listing of Pennsylvania certified home inspectors. Or, find a home inspector anywhere in the world with our inspection search engine.
  #2  
Old 6/22/11, 11:10 PM
Jeffrey R. Pope, CMI's Avatar
Jeffrey R. Pope, CMI Jeffrey R. Pope, CMI is offline
InterNACHI Member
 
Join Date: Aug 2003
Location: Santa Clarita, CA
Posts: 11,795
Default Re: Need code reference for AC condensate drain line

M1411.3.2 Drain pipe materials and sizes. Components of the condensate disposal system shall be cast iron, galvanized steel, copper, polybutylene, polyethylene, ABS, CPVC or PVC pipe or tubing. All components shall be selected for the pressure and temperature rating of the installation. Condensate waste and drain line size shall be not less than 3/4-inch (91mm) internal diameter and shall not decrease in size from the drain pan connection to the place of condensate disposal.Where the drain pipes from more than one unit are manifolded together for condensate drainage, the pipe or tubing shall be sized in accordance with an approved method. All horizontal sections of drain piping shall be installed in uniform alignment at a uniform slope.



IF YOUR INSPECTOR IS NOT USING THERMAL IMAGING, YOU'RE NOT GETTING THE WHOLE PICTURE «
Jeff Pope
JPI Home Inspection Service
Santa Clarita CA
(661) 212-0738
Santa Clarita Home Inspection
http://www.MyInspector.net


Reply With Quote
  #3  
Old 6/25/11, 2:28 PM
Jeff Gatt Jeff Gatt is offline
New User
 
Join Date: Jun 2011
Posts: 4
Please Note: Jeff Gatt is a non-member guest and is in no way affiliated with InterNACHI or its members.
Default Re: Need code reference for AC condensate drain line

Quote:
Originally Posted by wfossierjr View Post
Does the ac condensate line have to be rigid pipe where it attaches to the tail pipe of a vanity. Need code reference

I would think you need to look at the bigger picture as to where the condensate drain is connected.

Code requires that the condensate be connected to the building drain though an air gap connection and NOT physical to the drain. If the drain system backs up the there is potential that it can back up into the evap coil
Reply With Quote
  #4  
Old 6/26/11, 4:05 PM
roconnor's Avatar
roconnor roconnor is offline
InterNACHI Member
 
Join Date: Jul 2003
Location: Long Island, NY
Posts: 1,287
Default Re: Need code reference for AC condensate drain line

Quote:
Originally Posted by Jeff Gatt View Post
Code requires that the condensate be connected to the building drain though an air gap connection and NOT physical to the drain.
Not true. Model codes like the IRC only require the condensate to be conveyed to an "approved place of disposal"
(e.g. IRC M1411.3 Condensate Disposal ... http://publicecodes.citation.com/ico...011_par002.htm)

Acceptable places for disposal include roof gutters, discharge at grade (preferably not draining across a walking surface), and fixture waste connectors before the trap (e.g. sink tailpiece before the trap). For the last option the AC unit just needs to be above the sink (attic installations) or connected through a condensate pump (basement installations) to physically connect the condensate lines to the waste drain.

Family mechanical business has been doing it that way for quite some time, including new construction with some very strict/picky building inspectors.

JMO & 2-Nickels ...



Robert O'Connor, PE
Consulting Engineer & Inspector
LIU CW Post Adjunct Professor
NACHI Education Committee
www.reporthost.com/-rjo

I am absolutely amazed sometimes by how much thought goes into doing things wrong ...
Reply With Quote
  #5  
Old 6/26/11, 5:44 PM
cevans cevans is offline
InterNACHI Member
 
Join Date: Sep 2006
Location: TX
Posts: 3,516
Please Note: cevans is a non-member guest and is in no way affiliated with InterNACHI or its members.
Default Re: Need code reference for AC condensate drain line

Quote:
Originally Posted by wfossierjr View Post
Does the ac condensate line have to be rigid pipe where it attaches to the tail pipe of a vanity. Need code reference
Use of rubber type hose to make the connection from the PVC condensation drain to the sanitary side of the sink tailpiece is common practice, at least in this part of TX. I prefer solid PVC connections but only call out hose type connections if they are not secure or the hose is deformed due to too sharp a bend.

I wouldn't worry too much about the sink backing up into the evaporator coil up in the attic
Reply With Quote
  #6  
Old 6/26/11, 5:45 PM
cevans cevans is offline
InterNACHI Member
 
Join Date: Sep 2006
Location: TX
Posts: 3,516
Please Note: cevans is a non-member guest and is in no way affiliated with InterNACHI or its members.
Default Re: Need code reference for AC condensate drain line

Quote:
Originally Posted by wfossierjr View Post
Does the ac condensate line have to be rigid pipe where it attaches to the tail pipe of a vanity. Need code reference
Use of rubber type hose to make the connection from the PVC drain to the sanitary side of the sink tailpiece is common practice, at least in this part of TX. I prefer rigid PVC connections (which makes servicing the drain more difficult) but only call out hose type connections if they are not securely clamped at both ends or the hose is deformed due to too sharp a bend.

I wouldn't worry too much about the sink backing up into the evaporator coil up in the attic

Last edited by cevans; 6/26/11 at 6:35 PM..
Reply With Quote
  #7  
Old 6/26/11, 6:27 PM
roconnor's Avatar
roconnor roconnor is offline
InterNACHI Member
 
Join Date: Jul 2003
Location: Long Island, NY
Posts: 1,287
Default Re: Need code reference for AC condensate drain line

Flexible piping used to connect the condensate drain to a sink tailpiece should be polyethylene or polyvinylchloride tubing (usually milky white or clear) ... see Jeff's post.

Using flexible poly tubing for connecting to a sink tailpiece is the preferred method for many installers, because it's only a matter of time before gunk, hair, etc. clog that tailpiece wye fitting and it needs to be taken apart to properly clean. It looks similar to a dishwasher drain hose connection.

JMO & 2-Nickels ...



Robert O'Connor, PE
Consulting Engineer & Inspector
LIU CW Post Adjunct Professor
NACHI Education Committee
www.reporthost.com/-rjo

I am absolutely amazed sometimes by how much thought goes into doing things wrong ...

Last edited by roconnor; 6/27/11 at 11:42 PM..
Reply With Quote
  #8  
Old 9/18/13, 3:16 PM
Michael L. Boore's Avatar
Michael L. Boore Michael L. Boore is offline
InterNACHI Member
 
Join Date: Jul 2013
Location: Hardy, Va.
Posts: 33
Default Re: Need code reference for AC condensate drain line

But can the rubber hose be reduced in size ? I think no.



Hallmark Home Inspections, LLC
Serving Smith Mtn. Lake & the Roanoke Valley.
www.hallmarkva.com
Reply With Quote
  #9  
Old 9/18/13, 4:42 PM
Charley L. Bottger's Avatar
Charley L. Bottger Charley L. Bottger is offline
InterNACHI Member
 
Join Date: Apr 2004
Location: North Central Okla
Posts: 7,985
Default Re: Need code reference for AC condensate drain line

Quote:
Originally Posted by mboore View Post
But can the rubber hose be reduced in size ? I think no.
And the answer behind door # 3 is no



http://www.oklahomathermalinfraredimaging.com/
http://www.freedomexpressinspections.com/
Master HVAC Mechanic Retired
Level III Thermographer # 8486 Infraspection Institute
CMI Certified Master Inspector
Residential/Commercial Inspections
Moisture Intrusion Expert Witness
580-268-3340
Reply With Quote
Reply

Thread Tools

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 On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
What to do with a blocked condensate drain line jhugenroth Inspecting HVAC Systems 5 1/19/11 6:51 PM
Condensate Drainage jevans Inspecting HVAC Systems 28 11/27/10 2:55 PM
TPRV line and condensate line marriage ccarrington Plumbing Inspections 3 4/29/06 7:59 AM

All times are GMT -4. The time now is 5:00 AM.
no new posts