Splitting 1 bathroom into 2 smaller bathrooms

[MrHappy]

I am in MN which follows the 2020 UPC. I am splitting a 10x7 full bath into 2 smaller 5x7 baths (3/4 one side, full other side). To accomplish this the existing fixtures & drains will all have to be moved. There is an existing 1.25" vent which I'll be reusing (upping the size to 2") as well as the main stack which is 3" i'll be reusing. The room underneath the bathroom is an unfinished storage room so I'm ok with dropping pipes a bit lower to accommodate the weird layout

I attached a diagram of the proposed new layout, as well as the proposed plumbing diagram. Reading through the UPC I am most concerned with the vertical venting of the toilet. The code states 6ft is allowed from the flange to the start of the vent. Does that mean where it connects to the main stack, or does it have to get all the way up to past the lavatory above where it's no longer wet vented?

Anything else jump out as being incorrect? Note that some of the horizontal connections are marked as wye, but may become combo tees instead depending on the angle of the trap arms connecting in.

 

[wwhitney]

Basically looks great. The connectivity (order of fixtures coming in) is good. The 2" VTR and 3" VTR could obviously combine in the attic to a single roof penetration. And the pipes marked VTR can't have anything draining down from above (compulsory reminder, you probably know that).

On the right side, the 6' limit applies from the WC closet flange, measured along the pipe both vertically and horizontally, to the stack where the WC is being vertically wet vented. You can use a 3" wye at the stack to connect the WC, since the WC is not subject to the trap weir rule. Not sure if a 3" wye is better, but it's definitely not worse. A 3" san-tee is fine if a 3" wye won't fit for some reason.

On the left, the 6' limit is from the closet flange to the 3x2x3 wye, which is where the WC is horizontally wet vented. You can see that it's analogous to the right side, if the stack were turn 90 degrees to be horizontal.

I'm not sure if the 2" cleanout is needed; are you going to make it accessible?

Cheers, Wayne

 

[Sponsor]

 

[MrHappy]

Basically looks great. The connectivity (order of fixtures coming in) is good. The 2" VTR and 3" VTR could obviously combine in the attic to a single roof penetration. And the pipes marked VTR can't have anything draining down from above (compulsory reminder, you probably know that).

On the right side, the 6' limit applies from the WC closet flange, measured along the pipe both vertically and horizontally, to the stack where the WC is being vertically wet vented. You can use a 3" wye at the stack to connect the WC, since the WC is not subject to the trap weir rule. Not sure if a 3" wye is better, but it's definitely not worse. A 3" san-tee is fine if a 3" wye won't fit for some reason.

On the left, the 6' limit is from the closet flange to the 3x2x3 wye, which is where the WC is horizontally wet vented. You can see that it's analogous to the right side, if the stack were turn 90 degrees to be horizontal.

I'm not sure if the 2" cleanout is needed; are you going to make it accessible?

Cheers, Wayne

I appreciate the rely! Glad to hear everything looks good as well!

As for the 2" cleanout, I thought it needed an access point since it is changing from vertical to horizontal there? All the drains will be in an unfinished room of the basement, so it will be accessible easily.

 

[Storm rider]

You will need to add some dimensions to that plan to see if the fixtures have the correct spacing. It is difficult to fit a three piece bathroom into a 5x7 space.