View Full Version : A/C Evap Drain Piping Trap

Bruce Breedlove
07-24-2007, 02:55 AM
Anything wrong with the way this installer provided a trap for the A/C evaporator drain piping? (The stuff growing inside the piping has been noted.)

Rick Hurst
07-24-2007, 03:59 AM

There is no need for the loop in that drain hose. Water does not drain uphill and the loop will be a sediment trap.

I personally don't care for that type of drain material. It is notorious for catching debris and stopping up.

The only good about it is you can see the blockage and know you need to replace the hose.

Jim Luttrall
07-24-2007, 05:18 AM
No vent for his "loop trap", any trap (and I use that term very loosly) seal will be siphoned out leaving no functioning trap. Just bad design in my opinion.

07-24-2007, 06:29 AM
I'd be more concerned about the notching for combustible clearance or lack thereof. Hard to tell from the photo.

Bruce Breedlove
07-24-2007, 12:02 PM
Good eye, Barry. The floor framing around the stair opening and framing around the stairs had numerous problems. I was focusing the evap drain piping here.

Jerry Peck
07-24-2007, 01:38 PM

What's that switch for?

Not a "disconnect" for something, is it?

Bruce Breedlove
07-24-2007, 04:46 PM
Furnace kill switch.

Jerry Peck
07-24-2007, 04:50 PM
Furnace kill switch.

Okay, but there is a disconnect ahead of it not mounted to the furnace, right?

Kathy Thompson
07-27-2007, 08:27 AM
It is my understanding that these drain pipes are required to be hard plumbed and not flex tubing.

Randy Aldering
07-27-2007, 08:32 AM
I am interested in seeing the termination of the condensate drain. For what it is worth, I doubt you will find this type of installation described in the manufacturer's installation material.

Bruce Breedlove
07-27-2007, 01:35 PM
Discharges at floor drain.