DIY Home Improvement, Remodeling & Repair Forum > DIY Home Improvement > Plumbing Forum > Floor Drain for AC Condensate Discharge




Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old 06-27-2013, 05:49 PM  
ollie24018
Junior Member
 
Join Date: Jul 2009
Posts: 4
Default

The trap stops flue gases from entering the drain pipe, and allows free flow, or stopping "water slugging". That's also why you have to trap a/c condensate with the evap coil on the negative side of the blower.

The trap is on the negative side of the blower. if the trap was not in place, the blower would suck air up through the drain line not allowing the condensate to flow out. thus causing a flooding problem.

Just following what my HVAC man told me. Makes sense.

I hope this helps.

Sounds as though many ideas. Mine works and have had no issues for 30 years.



__________________
ollie24018 is offline  
 
Reply With Quote Quick reply to this message
Old 06-27-2013, 07:15 PM  
nealtw
Contractor
 
Join Date: Nov 2010
Location: vancouver, b.c.
Posts: 10,208
Liked 837 Times on 748 Posts
Likes Given: 1451

Default

But the code says you need a 2" gap between the pipe and the vessel so the fan dosn't suck sewer into the AC and this particular set up the pipe just sat above the drain and spilled water on the floor. So it looks like they want it both ways. If a trap works don't worry about the sewer backing up, so what's the gap for? I'm just trying to understand. I guess we need your HVAC to explain it. And welcome to the site



__________________
nealtw is offline  
 
Reply With Quote Quick reply to this message
Old 06-28-2013, 07:31 AM  
ollie24018
Junior Member
 
Join Date: Jul 2009
Posts: 4
Default

The condensate pipe just goes down into the drain opening. When a sewer backup occurs it will spill out onto your floor. It will not be sucked up into the equipment because you a P-trap with water in the elbow. Water prevents any suction.
Mine has been working this way for 25 years and no issues.

__________________
ollie24018 is offline  
 
Reply With Quote Quick reply to this message
Old 07-05-2013, 12:17 AM  
nealtw
Contractor
 
Join Date: Nov 2010
Location: vancouver, b.c.
Posts: 10,208
Liked 837 Times on 748 Posts
Likes Given: 1451

Default

If it won't suck water out of the trap why would it suck it out of the sewer.

__________________
nealtw is offline  
 
Reply With Quote Quick reply to this message
Reply


Quick Reply
Message:
Options

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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 On
Refbacks are On


Similar Threads
Thread Thread Starter DIY Home Repair Forum Replies Last Post
re-running condensate drain beachguy005 HVAC 4 01-25-2013 09:41 AM
Attic condensate drain-via walls? edlank Plumbing Forum 8 12-16-2010 05:17 PM
water heater discharge pipe coordinator Plumbing Forum 3 06-04-2010 07:10 AM
Floor drain capteasier Plumbing Forum 3 12-19-2007 10:11 AM
Condensate drain question Phatboy HVAC 5 10-09-2007 07:20 PM