Open vent condensate

[jar546]

Never saw anything like this before. There is an actual clean out that has the orange sticker on top of the cab for the trap. I don’t know why they would add this vertical fence without a cap. Has anyone seen this before? I am requiring that it be capped off even if removable.

 

[cda]

Yes at my house, if you mean the white pipe

Thought the open was so a vacuum or other would not be created??

 

[SCBO1]

It looks like it may be entering directly into the sanitary drain line.

I see this sometimes at the furnace A-frame discharge port, vent tee.

 

[Paul Sweet]

It might be necessary on a draw-thru coil to keep the blower from sucking all the condensate back.

 

[mtlogcabin]

The trap should be higher to avoid the long vent pipe

This vent is AFTER the trap and must remain open to be effective. The vent opening should always rise above the trip level of the condensate overflow switch when it is in the primary drain line or pan or above the secondary/aux overflow port on the primary drain pan. That helps ensure that that the water properly trips the switch instead of overflowing out of the vent if a backup occurs.

 

[Joe.B]

I've seen this frequently but always discharging outside the building, not into sanitary drainage.