New sink drain trouble

[Racer4]

Wouldn't that in essence make an S trap, and that's not code?

An S trap would be going into a pipe coming up from the floor. And you’re right about that not being code. An S trap, if not vented correctly has the potential to suck the water right out of the trap, allowing sewer gas to enter. The way I described would break the vacuum as the water fell into the larger 1-1/2” sch 40 pipe.

ETA:
I’ve had an S trap in my kitchen sink for almost 25 years with no issues. But it’s teed into a standpipe in the sink cabinet with a pop vent up tight underneath the counter.

 

[ultrarunner]

Maybe it was plumbed with the idea of a washing machine standpipe?

Also… laundry sinks can be much deeper than a regular sink so lower would be better.

Was the plan always for a cabinet?

Lots of different way to approach including a clearance hole if low profile trap not code approved where you are.

I’ve had the opposite problem where the inlet is too high and had to open the wall to lower… deep cast iron kitchen sink with attached garbage disposal…

 

[Racer4]

Maybe it was plumbed with the idea of a washing machine standpipe?

Also… laundry sinks can be much deeper than a regular sink so lower would be better.

Was the plan always for a cabinet?

Lots of different way to approach including a clearance hole if low profile trap not code approved where you are.

I’ve had the opposite problem where the inlet is too high and had to open the wall to lower… deep cast iron kitchen sink with attached garbage disposal…

Very well could have been for a traditional laundry tub sink.

Washing machine would need to be 2” pipe for code, and would have its own trap in the wall or in basement. Definitely wouldn’t stub out that low.

 

[ultrarunner]

A lot of what I run into with existing is 1.5” cast iron with the cast iron trap just above finish floor with 30” length of threaded galvanized for the riser…

I’ve had to choke down washer drain lines to reduce the volume to make it work…

Joys of pre WWII tract homes.

 

[Racer4]

A lot of what I run into with existing is 1.5” cast iron with the cast iron trap just above finish floor with 30” length of threaded galvanized for the riser…

I’ve had to choke down washer drain lines to reduce the volume to make it work…

Joys of pre WWII tract homes.

Ughh. Cast iron sucks. I’m no plumber, but as a GC, I see a lot of crap. The only, and I mean only good thing about cast iron is that it’s quiet. We remove as much cast as we can when doing remodeling. See a lot of lead toilet hubs, tub/shower drains , etc connected to the cast iron. Good scrapping!

 

[ultrarunner]

Cast Iron, Lead Bends, Copper DWV, Galvanized and assorted composites.

Plastic was banned is several local jurisdictions above ground by order of the fire marshal due to toxic smoke generated in a fire…

Another jurisdiction only allowed ground joint 17 ga traps and another required copper for all potable water lines.

Had a building where tenant poured cooking grease down the sink and was told next time she would be charged to clear…

Believed the problem solved but tenant bought drain acid which made Swiss Cheese of the cast iron.

Low Flow lightly used toilets and long cast iron runs is problem I’m seeing more frequently…

Plumbing done well requires a good thought process developed through experience…

 

[Paddy]

dstig,

Ask your plumber why it was set so low? If I did it, I would fix it! That is raise it up

 

[dstig1]

The washing machine has it's own standpipe/box with water supply and the drain in the wall a couple feet over. I have a deep sink in the cabinet now. This was just set too low for some unknown reason. And the plumber wrapped up his work in 2014, so he's long out of the picture at this point...

I basically built this place myself, and this is one of those final details I am getting around to working on 10 yrs later. If you are curious, my house build blog is linked in my sig below. You could be my one lonely visitor this month if you click now!

Need to stop at Menards and get a couple ells tonight... This will not create an S trap, it is just a bend in the drain line. There is still a P trap that will be in place. This was what I figured I would have to do in the first place, but wanted to see if I was missing something before I committed. There has been no sink here for 10 yrs, so a couple more days won't matter...

 

[ponytug]

I'm impressed that there hasn't been odors or leakage...

 

[dstig1]

It was capped by the plumber...It's not open.