Questions Regarding AC Coil Condensate Line - HVAC - DIY Chatroom Home Improvement Forum

Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > HVAC


Thread Tools Display Modes
Old 03-14-2010, 06:16 PM   #1
Join Date: Mar 2010
Posts: 1
Rewards Points: 10

Questions regarding AC coil condensate line

I recently went under my house to do some plumbing for a bathroom remodel and discovered a huge amount of moisture in the crawl space. I believe that to be largely weather related but upon inspection I did see that the ac coil condensate line had a problem.

As you can see from the attached photos (the top 2 are the "before"), the trap on the line running from the coil pan had broken. The installers used a rigid piece of clear PVC on the lower side of the trap and flexible PVC tubing on the upper side. The rigid piece broke where it was connected to the unit's 3/8" drain tube (likely either from age/brittleness or maybe it froze when there was condensate in the line during winter?).

Being the inexperienced beanhead that I am, I thought that the trap was a lazy way that the installers had connected the drain tube to the drain line running outside. When I redid the drain line, I removed the trap and straightened up the run of the drain line (removing the 90 degree turn shown below). After doing research on this (why didn't I do research BEFORE???) I believe that I have absolutely GOT to have a trap on this drainage system.

Please confirm what I am thinking, and confirm that my "after" pictures (the bottom 2) will result in disaster if I don't reinstall a trap.

Thanks in advance and please go easy on me even though I am an idiot.
Attached Images


lassiter1979 is offline   Reply With Quote
Old 03-14-2010, 08:47 PM   #2
biggles's Avatar
Join Date: Jan 2008
Location: Long Island
Posts: 3,630
Rewards Points: 2,000

FORGET trapping off that clear tube....typical units have a 3/4 PVC female thread at pan sticking out of the unit and you pvc out trapping right at the unit..hopping the line out is always lower then the bottom of the last elbow on the trap.....gravity.that plastic tube just hanging there calls for a condenstae pump to go right into then loop the discharge into that will be real tight traping out and off that tube main line is above or at the base level of the unit.ii5V condensate pup plugged directly into a socket will work on the interior floatrise to pump out.if you slide a pmp under the unit you can take the discharge out with the same type hose sticking out of the bottom there.... check for pumps DIYs welcomed.... any followup that repipe will drain but if that tube sucks air with the fan on the water will only drain when the fan shuts and it will build up within the unit


Last edited by biggles; 03-14-2010 at 08:57 PM.
biggles is offline   Reply With Quote

Thread Tools
Display Modes

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

Similar Threads
Thread Thread Starter Forum Replies Last Post
Loud vibration of indoor coil in heat mode john-hvac-new HVAC 3 11-03-2009 09:27 AM
Do I need to prime my oil feed line? 1parkpointer HVAC 3 10-22-2009 06:52 PM
Broken, busted, clogged storm sewer line... Upstate Steve Plumbing 1 04-07-2009 11:26 AM
how to run fridge water line under kitchen floor? travishume Plumbing 23 09-26-2006 07:51 AM
Installing exterior faucet to washer line? skellies Plumbing 3 06-18-2006 08:19 PM

Top of Page | View New Posts


Search Engine Friendly URLs by vBSEO 3.6.1