What would be the current way to plumb these sinks ?

[Ludington]

sinks are 42 inches apart, and they are joined in the middle using 1 ptrap. Wrong as it may be now, Installed and passed back in 84. No flow problems (Unless wife has gummed it up) you might be thinking, why is that one faucet turned to the side... well SWMBO wanted it that way. The only odd part is when soap creates foam, the other sink will gurgle and depending on how soapy she gets, some foam will actually appear in the other sink. (There is a diverter in the t between the sinks, but it gets past it) ( no gurgle without the foam)
So would these really need seperate, p traps ? And if so, how would you run them ? Towards the back of the cabinet and then over ? Or just along the current path. (Swmbo would not like that. )
As you can see the drain goes down within the cabinet and the vent is in the wall. Double floor joist under that wall.

 

[MicEd69]

There isn't any problem with your drain lines and the baffle tee connecting the two sink drains. The gurgling sound is likely just the soapy water flowing down and/or past the baffle tee. That happens a lot on double kitchen sinks that use one P-trap. It's nothing to really worry about.

However, your vent line turns horizontal before it gets 6" above the flood level of the sinks. If that is a dry vent, that isn't per code. Maybe not a huge problem. but not per code.

You could re-pipe everything and install two P-traps, but it would be a little messy with that layout, and it wouldn't really function any better at all, IMHO.

 

[Twowaxhack]

I would cut all that vertical pvc out including the 90 turned toward the wall for the vent.

Then I’d stack two sanitary tees on top of each other one pointing toward each lavatory. I’d put a clean out in that vertical piping also. So you’d end up with three tees on top of each other. I might would cut some of the wall out to make my connection to the vent.

There are several ways to do it. The least attractive is how yours is piped now. I’m surprised your piping doesn’t stink.

 

[MicEd69]

I’m surprised your piping doesn’t stink.

Just curious, why would the piing stink the way it is now?

 

[Twowaxhack]

Just curious, why would the piing stink the way it is now?

The goop in the piping between the fixtures and the Ptrap. You’d have to run a lot of water to keep all that horizontal piping clean.

The way I’d pipe it you’d only have 8”-12” of vertical piping between the lavatory and the trap inlet and Zero horizontal piping.

 

[Ludington]

I would cut all that vertical pvc out including the 90 turned toward the wall for the vent.

Then I’d stack two sanitary tees on top of each other one pointing toward each lavatory. I’d put a clean out in that vertical piping also. So you’d end up with three tees on top of each other. I might would cut some of the wall out to make my connection to the vent.

There are several ways to do it. The least attractive is how yours is piped now. I’m surprised your piping doesn’t stink.

Trying to picture that .. doesn't make sense in my minds eye. So, your having 2 p-traps ? One from each sink pointing to the drain line. One below the other. Plus a clean out, then going up to attach to the vent line. Seems clunky. I was thinking if I was adding another ptrap, they would go into a y fitting of some type. Something like in this picture.... but fixing the vent.. that would get messy real fast. 3/4 cabinet back, then the drywall. But as far as space, that would open up the middle, but reduce under the sinks.
I wonder if they make a wye connector instead of the t diverter connector I've got ? That would probably stop my gurgle . Probably would need to make it a glued joint and lower the ptrap a smidgen.
But it's been this way 40 years, no smells. Just the gurgle. I think I've pulled it apart once and cleaned it out.
That's what happens when your retired, you get bored and start looking for stuff.
Thanks !

 

[Twowaxhack]

Trying to picture that .. doesn't make sense in my minds eye. So, your having 2 p-traps ? One from each sink pointing to the drain line. One below the other. Plus a clean out, then going up to attach to the vent line. Seems clunky. I was thinking if I was adding another ptrap, they would go into a y fitting of some type. Something like in this picture.... but fixing the vent.. that would get messy real fast. 3/4 cabinet back, then the drywall. But as far as space, that would open up the middle, but reduce under the sinks.
I wonder if they make a wye connector instead of the t diverter connector I've got ? That would probably stop my gurgle . Probably would need to make it a glued joint and lower the ptrap a smidgen.
But it's been this way 40 years, no smells. Just the gurgle. I think I've pulled it apart once and cleaned it out.
That's what happens when your retired, you get bored and start looking for stuff.
Thanks !

Well I’m not trying to get your approval just trying to tell you the proper way to pipe it, or at least how I’d pipe it at my house.

I say that respectfully.

 

[Twowaxhack]

You could also use a double fixture fitting and with pipe extending along the back of the cabinet going horizontal then use 45’s to align with your lavatories then install a ptrap under each bowl. This would free up some room under the vanity. It’s similar to how it would be piped if it were in the wall where it should’ve been.

 

[Ludington]

You could also use a double fixture fitting and with pipe extending along the back of the cabinet going horizontal then use 45’s to align with your lavatories then install a ptrap under each bowl. This would free up some room under the vanity. It’s similar to how it would be piped if it were in the wall where it should’ve been.

No, that was exactly what I was asking, I know you are the one to ask. But, turn that knife just a little more... I knew nothing when I built my house back in 84. Got my general contractors license, followed the rule books for electrical and plumbing.. needed to put a roof over my head, and when the bank won't let you borrow what you need, you do it yourself.
I drew a set of prints took it to the bank, said I wanted to borrow 30k. They said you need a contractor, went to school, took the test, got my license, back to the bank... let us look at your prints... a week later, it was .. you cant build this for 30k, it will take 40k. I said ok, I'll borrow 40k and just use what I need.... I'm sorry sir, you don't qualify to borrow 40k. I was lucky my parents fronted me 10k , that I paid back on my first construction draw. But I built my house for 30k.
1900 sq ft, with full drive in basement. Full brick. I did pay to have it dried in, but after that, I did it all. I've learned a lot along the way, electric is pretty straight forward, but plumbing has so many different rules and fittings now. All mine is up to 1985 code... but not now. That's one reason I asked.
I might have put it in the wall back then, but getting the drain down through the floor , being the wall is sitting on a double floor joist. Still don't have any idea how you would get it down.
But anyway, thanks, I Kew you would have an answer.