Thanks for taking the time to review and offer suggestions!!! I appreciate all of the feedback !!! Replies below:
1.
I suspect there is a simpler way to handle the drain out of the washing machine box - Yes, looking back now it is more complex than needed. Simplified in version 3 plans below.
2.
All of the horizontal drain connections must be made with wyes. Correct, this was just an error in not being able to find the right models in sketchup. I corrected this in version 2 and 3 after finding more better models. Still not perfect though as I could not find a 3x3x2 combo.
3.
I would also install cleanouts on every vertical line that is going down below the floor. Good input. Thanks. I added them in for the two sinks. For the laundry, wouldn't it be just as easy to clean through the outlet box itself versus having a separate cleanout plug or am I missing something here? Since its behind the washer its probably no big deal to add it.
4.
Maybe you take a slightly longer path for the sinks and dump each in its respective toilet line so it's wet venting them? Unfortunately there are other obstructions under the subfloor so this is the best route.
5.
Probably can't get the right fitting in Sketchup but where the laundry/shower line hits the main should probably be a 3x3x2 combo. Correct, I planned to use 3x3x2 combo but could not find the right model. Tried unsuccessfully to make one so gave up. Was not planning to use a reducer.
6.
Wouldn't be much more expensive to have a 3" "side line" from the main and dump the 2" into that. Excellent suggestion! Done!
7.
might be easier to go vertical and join things in attic This area has a dormer roof and I was unable to show the angled walls in the first plan version. There is no attic here to get to. The walls they would be run in will be added to make new vent line easier to run and also to allow the toilet to be brought further away from the sloped wall to provide more height.
8.
Or at least combine the shower 2 line with the toilet lines rather than dual runs. so, would be interested in feedback on this one. Reference guides note that when stack venting, never place a toilet above the other fixtures due to the larger discharge. To avoid doing this, I had a separate line for shower #2 which dumps into the vent stack above the two toilets. Since it was a new wall I was adding as noted in 6 above, there would no obstructions to worry about. If there is any chance of the toilet sucking shower #2 trap dry I would rather run the extra line. PVC pipe is cheap to run now before tile and everything else is up... Later it gets really expensive to correct
9. cool drawings. I am amazed by the Google sketchup application. I saw someone else had used it so I downloaded a 30 day trial version for free. It took about one day of playing to get the hang of it but had the majority of the basic room laid out and first crack at drain locations on day two. Had completed plans and started fine tuning errors and such by day three. Obviously it will be much easier to use next time. Since I am always doing some project, it is a handy software package and incredibly powerful.
New plans below with changes noted in red. I also added in a test plug after all the new work before entering the main line so I can leak test the new construction. Appreciate all the suggestions! Paul