A/C Condensate Drain "P" Trap


Old 11-16-00, 07:27 PM
Visiting Guest
Posts: n/a

My home was recently inspected for sale. Inspector said "The condensate line does not have a "P" trap.
1. What is a "P" trap and where does it go?
2. Is it necessary for proper function of the condensate drain line?
Thanks//[email protected]
Sponsored Links
Old 11-18-00, 07:50 PM
Visiting Guest
Posts: n/a

The trap he is talking about would go into the drain from the air conditioner coil above the furnace. If it is and it sounds like it might be piped straight into the houses' drain pipe or vent. What can happen is sewer gases can get into the furnace plenum. To stop this a P Trap which looks like a pipe with a u shaped bend can trap water in it stopping the sewer gas from getting back to the furnace.
On an air handler were the blower is after the coil the negitive pressure keeps the coil from draining. By adding a Trap that goes 3 -4 inches down then back up. Gravity can help the water drain against the negitve presures.
Good Luck
Mr Foster

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
Ask a Question
Question Title:
Your question will be posted in: