Horizontal branch line fixtures

[xyz1945]

We are working on a new modular home on a basement. There will be a horizontal branch line servicing the water closet, vanity, shower, & washer. All of the fixtures are individually vented. Does it matter where the water closet enters the branch line (i.e. upstream or downstream of other fixtures)?
What about the washer?

 

[Terry]

Between the fixture and the wye fitting, there should be a vent.

If the fixtures are vented that way, then the order makes no difference.

 

[Sponsor]

 

[hj]

toilets

WHERE the fixtures go is immaterial. Whether you have the proper vents on them IS important regardless of how you have them arranged.