Basement utility sink

[firebard]

Hi everyone! I need some help connecting DWV lines for a utility sink in a basement mechanical room. I'm in WA state.

Here's my situation:
1) mechanical room has a floor drain w/ trap and 2" pipe under slab. At time of construction, the plumber left a stub of insulated 1/2" pex for priming the drain. I can explain why it was never connected, but it's a long story...
2) I want to add a utility sink and connect the primer line to the sink's 1.5" drain stack. I've already added water supply lines and now I need to connect up the drain & vent.
3) I initially thought I could wet vent the sink into the vertical DWV pipe next to it. It's a 1.5" out of the slab that serves as the vent for the floor drain. It's dry now and connects with the vents for a washer and laundry sink upstairs. After reading up on wet venting, I don't think my idea will meet code...
3) My plan now is to run the sink drain along the foundation wall and connect into a 3" sewer line about 6' away.
4) This waste pipe serves four fixtures on our first floor: (1) toilet, (1) lav, (1) washer, and (1) laundry room sink.
5) The floor drain is part of a separate waste run that goes out a different part of the house.

My questions:
1) Does this layout look OK for code? I know it's not the most elegant...trying to work with what I have.
2) Should I use a Santee or Wye for the 2" to 3" drain connection? Is it OK that it will splice in where the pipe is angled downward?
3) Should I use tees or wyes for the vent connections?

Thanks!

 

[Cacher_Chick]

A trap primer is fed from the potable water supply via a primer valve. Feeding it from a drain is going to clog the line and/or cause it to smell.

 

[Sponsor]

 

[firebard]

I was intending to use one of these things. From what I've read, it sounds like it was a legit method. But I could add the valve to the water line, that's not a big deal if it's a better way to go. Thx for the input.

 

[firebard]

I've been trying to educate myself more on the correct use of wyes and tees this weekend, and I think this is right but would appreciate confirmation. I read a lot about horizontal to vertical but what's got me stumped is that the 3" soil line where I want to connect into is on a 45* angle.

Also, I think I need a cleanout on the blue 2" drain line for that U turn. Correct?

 

[Plumber01]

That will work. 45* is considered vertical so you could use a santee. I would go with a wye if it works.

Only thing that would concern me is the height of the drain at the sink at a 1/4" per foot. I typically rough in those type of laundry sinks at 14" from floor. With the addition of the trap primer tailpiece you will need to go even lower.