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View Full Version : 1/2" black pipe tied to 4" drain line


Randall Clark
10-17-2009, 04:22 PM
Anyone know what this might be for... 1/2" polyethylene pipe connected a drain line and then runs up into wall somewhere into the laundry room. I am guessing it might be for a drain pan under the washing machine but without a visible trap, sewer gas may enter the home.
Bruce Ramsey
10-17-2009, 04:54 PM
Whatever it is for, it is wrong.

At no time or place is it OK to drill a hole in the side of of a waste line and jam a flexible hose in it. Just plain wrong. Does not matter what the flexible pipe is servicing.
Erby Crofutt
10-18-2009, 08:52 AM
AC Coil condensate drain line????
Randall Clark
10-18-2009, 11:04 AM
AC Coil condensate drain line????

No, it had its own drain line.
Anthony Alderman
10-18-2009, 12:11 PM
Dish washer drain??
Jack Feldmann
10-18-2009, 01:55 PM
Water softener discharge?
Eric Spoomonger
10-19-2009, 12:02 AM
Anyone know what this might be for... 1/2" polyethylene pipe connected a drain line and then runs up .... but without a visible trap, sewer gas may enter the home.

It looks like the tubing goes down before it goes up, so if the liquid is just a trickle the dip is working like a trap.

A half-inch line won't carry enough water to stop a flood. I am thinking it's a trickle discharge of some sort - water softener, protein skimmer on an aquarium, etc.

Youj also might want to check the attic to see if it continues up to something catching a roof leak. ;)
M. Slusar
10-19-2009, 06:30 AM
I see that type of installation commonly in water softener installations. Flush cycle discharge...
The installers are NOT plumbers and do NOT know code (or care).
The simply pipe the discharge from the softener to the nearest waste pipe and typically tie in as shown (drill a hole, shove the tubing in and silicone it.).
Bad install, illegal install, gonna cause problems down the road.
Thomas Barker
10-19-2009, 08:07 AM
This is ridiculous to even question a DW drain. Dishwasher drains either have a air gap or a high loop (see inages) that discharges into the kitchen sink drain either through a branch tail piece or a disposal unit.
Bruce nailed it when he said,
Whatever it is for, it is wrong.
At no time or place is it OK to drill a hole in the side of of a waste line and jam a flexible hose in it. Just plain wrong. Does not matter what the flexible pipe is servicing.
Get somone to repair the sloppy. illegal work the other guy did. And find out what exactly that hose's draining. Good luck, Tom