What is going on here?

[Sean Corcoran]

Sorry for the bad pictures of this but I will describe. From a main floor sink, the waste pipe goes into the basement to a trap? There is an extensive pipe network attached to the wall there with a pipe going outside. Seems to me somethings not right here but I can't put my finger on it. I'll sneak back and get some better pictures. Really thought I got more of this set up.

[Sean Corcoran]

Hah... I did take a better picture of this basement piping... here it is

[Jeffrey R. Jonas]

Looks like they had venting issues, and found a creative fix to the problem.

[Gerry Beaumont]

Hi, if I'm understanding this correctly, you appear to have 2 issues here, firstly the sink is "double trapped" which is wrong, also the vents should terminate above the roof.

Regards

Gerry

[Chuck Evans]

Looks like a nightmare on Elm street.

First pic is an improper "S" trap
Second pic if same line is an improper double trap w/cleanout and too long tailpiece?
That thing on the outside provides a nice aroma for the folks dining on the patio

I can't figure out what they were thinking???

[Sean Corcoran]

Nice, yes I noted the s trap (every trap in the house was this way) Good lord, I''m thinking there is some major vent issue. Did notice two stacks coming through the roof. It's a homer delight. Oh by the way the owner is an electrician.... guess how the electrical looks?

[Jeffrey R. Wicklander]

I don't think it was created for venting purposes, but more to equalize the pressure in the drains. Similar to a kitchen island sink setup.

Jeff

[ccurrins]

Originally Posted by jwicklander

I don't think it was created for venting purposes, but more to equalize the pressure in the drains. Similar to a kitchen island sink setup.

Jeff

Your probably right. Problem is it will still vent.

[Chuck Evans]

Originally Posted by jwicklander

I don't think it was created for venting purposes, but more to equalize the pressure in the drains. Similar to a kitchen island sink setup.

Jeff

Doesn't meet any of the criteria for a loop vent either, including the fact that it vents to the atmosphere

My guess is that it's a lame attempt at venting multiple lines/fixtures. It's an abomination in any case.

Forgot to include in the first list of issues that there is inadequate support for the lines too. I would list it as amateurish plumbing that does not appear to comply with current standards, including, but not limited to:... and recommend full assessment and repair estimate by qualified licensed plumber.

[Sean Corcoran]

Thanks for the verbiage as well Chuck! It's certainly more complicated than it needed to be whatever the heck it is. Either way they need a plumber to come have a look see. Thanks again everyone.