Sink Drain Too High --- HELP !!

[Terry]

I carry these on the vans.

 

[Reach4]

Any theory on why the U bottom part is not more symmetric (below the larger diameter part)?

 

[Sponsor]

 

[Windsurfer]

Hi Terry, just noticed your location. I graduated from UW in 1973, retired now in Michigan. I almost bought an East Lake townhouse a few years back, but chickened out in the last minute. Seattle real estates has become so expansive.
I have drawn a new plan .. better I think.
Can you, REach4, or anyone give me some ideas on how to add a washer standpipe to this plan ?

 

[Reach4]

I have drawn a new plan .. better I think.

Better. If you use a santee to connect vents as you do at the top of your drawing, turn it upside down from how it would be used as a drain.
Plumbing-and-Trenching-for-Homeowners---2018 (klickitatcounty.org) page 5 shows a washer standpipe.

Most places allow you to use an AAV (Air Admittance Valve) that is accessible and able to let air in instead of a vent, but that is a potential point of failure.

 

[Windsurfer]

Yes, better flow direction ... thanks for pointing out.
Wow, that is a hell of a lot of good info in that reference.
My washer is located on the right, between the vertical drain pipe and the laundry sink. I wonder if I can put a standpipe in place of the laundry sink drain.
And add a new vertical 2" pipe to take the laundry sink drain down to the branch drain in the basement. The branch drain runs right along the wall and can be easily reached from the sink. The current 2" vertical drain is the only pipe feeding this branch drain. Or is it going to be as easy as I think ? Sorry that I'm probably not using the correct terminologies to describe it.

 

[Windsurfer]

Thank to the forum and in particular Reach4 and Terry, I went from completely clueless to actually able to finish this project.

Before and after :




Here I am using a repair coupling to check for alignment and height. It is great for checking pipe-to-pipe, pipe-to-elbow connections before gluing.



The final piece is the only place I needed a repair coupling. I didn't realize that you have to cut the pipe at an angle in order to fit without a gap. Not having the angle cut, I had to grind a bit off the pipe. That left a .25" gap on one side. But the coupling covered it nicely.

 

[hj]

quote; Any theory on why the U bottom part is not more symmetric

It is a Cycloid, which is the fastest way for something to move by gravity. Your repair coupling was installed improperly if you had to cut the pipe at an angle. The ends are supposed to be SQUARE so there is NO gap on the inside.

 

[Reach4]

It is a Cycloid, which is the fastest way for something to move by gravity.

Cool. https://en.wikipedia.org/wiki/Brachistochrone_curve

 

[Windsurfer]

The bottom of the pipe had to be put into a san-t while I slide the top to align to the pipe above. Seems to me a slight angled cut would work, or make one more straight cut.