DRAINAGE

Drainage outlets visible from the 2nd floor:
Kitchen sink drains into 1 1/2 inch wye
2nd floor bathroom sinks drain into 1 1/2 inch double wyea 0892

Drainage outlets visible from the 1st floor:
2nd floor tub drains into 1 1/2 inch pipe. 0897 
2nd floor toilets drain into 3 inch double wye. 0900 0908 0910 0911 0912
1st floor bathroom sinks drain into 1 1/2 inch double wye. 0905 0906
2nd floor shower drains into 2 inch pipe.

Drainage outlets visible from the basement:
1st floor tub drains into 1 1/2 inch pipe. 0922 0923 0924 0936
1st floor toilets drain into 3 inch double wye. 0913 0914 0938
1st floor shower drains into 2 inch pipe
subsurface tank contents pumped into 1 1.2 inch pipe. 1010

Drainage mergers:
2nd floor:
2nd floor bathroon sinks drain into double wye 0809

1st floor:
Bathroom sink drainages from second and first floor merge 0902

Basement:
1 1/2 inch kitchen sink drainage from 2nd floor enters
2 inch tail of sewer. 0933 0934

1 1/2 inch drains from 2nd floor and 1st floor tubs merge in 
a 2 inch wye which drains into 2 inch sewer tail. 0923 0924 0932 0935 0936

2 inch drains from all 4 bathroon sinks merge with 2 inch 
sewer tail to form 3 inch sewer.

Sump ejects into 1 1/2 inch pipe which is enlarged to 2 then 3 inch
pipes. The 2" drainage from the two showers enters a 3 inch pipe 0941
at the end of the 4 inch main sewer.

Drain from 3 inch double wye serving 1st floor toilets merges with
three inch toilet drain from 2nd floor to form 4 inch sewer 0913 0914
which merges with the other 4 inch drain to form main sewers 0982
from which the main 3 inch vent stack rises before the sewer exits the
foundation wall.