Finishing off a section of the basement and want to add a utility sink.

Plan on using a direct attached (ventless) pump on the sink, pretty much as shown here: 



The drain line is as shown in the pic, sloping left to right.

Is the wye fitting I have the proper one, and must it be oriented with reducer vertical as shown?

The partition wall the sink will be located at is perpendicular to the line and maybe a foot off screen to the right of the pic.

Trying to work out the optimal way to route the line.

I would use a long sweep 90 if entering vertically. If you want to enter from the side then I would use the wye  you have pictured rolled down. The wye needs a little elevation to it so not quite 90 degrees.

Attached File

I would keep the wyee vertical and put a street 45 in the wyee so the 45 is facing horizontal, not vertical.  It looks tight but I think the 1.5 inch line will clear the copper supply lines and avoid the joists/cords.

Time to learn what the code for your area is and requires.

There are a couple variation and lots of local stuff.

At least if you are not going to pull permits and inspection do it according to local code.

This

As shown in the video, it would not pass an inspection here or in MN, because of the 1 inch drain size. (the minimum drain size for a laundry/utility sink is 1 /2)
Also, in there installation, I would bet they'd have some gurgling drain issues every time the pump discharges

1-1/2"??

2" in many codes.

Washing machines empty FAST.

1 1/2 for a laundry tub/utility sink, with or without discharge from a washer.

minimum size for a automatic clothes washer is 2" in most codes

Of course even states who use either the UPC or IPC codes, many times will amend it, so your state may vary.