houndzilla
Member
I'm going a basement renovation as part of the work I am converting to overhead sewers.
Some relevant information:
Option 1:
This is what I provided in my permit drawings to the city:
Several plumbers who have walked the job have recommend this for cost and labor savings:
Similar to option 1, but run high gravity drain pipe inside along foundation wall. I'd rather not do this as I lose 5"-6" precious inches of livable area from my basement remodel, and would require I dig up a well groomed juniper bush I have spent years nursing back to health.
What are the downsides of Option 2's design that a lay person may not be aware of? Functionally it's the same, but instead of poop water backing up outside the footprint of my home, it backs up inside but is contained by the sealed PVC sanitary stack.
If option 2 is acceptable to you all, would it be reasonable to request that the new sanitary stack be pressure tested?
Some relevant information:
-Basement floor is ~5' below grade
-Existing sanitary line is ~7'-6" below grade
-Existing sanitary line exits the building footprint, then runs along side the building (within 24") towards city sewer
-Driveway runs alongside house with 24" dirt area where new sanitary line could be hand dug, several feet in elevation above the old line
-Existing sanitary line is cast iron, home built in 1957. Line appears to be in good condition with exception for dip somewhere close to street. Confirmed via camera.
-North suburb of Chicago
-Existing sanitary line is ~7'-6" below grade
-Existing sanitary line exits the building footprint, then runs along side the building (within 24") towards city sewer
-Driveway runs alongside house with 24" dirt area where new sanitary line could be hand dug, several feet in elevation above the old line
-Existing sanitary line is cast iron, home built in 1957. Line appears to be in good condition with exception for dip somewhere close to street. Confirmed via camera.
-North suburb of Chicago
Option 1:
This is what I provided in my permit drawings to the city:
-Existing underground sanitary is abandoned.
-First floor gravity drains in basement reworked to exit foundation walls ~18" below grade
-New high sewer line then pitches towards front yard, once clear of the house excavate for new vertical drop to connect to existing sewer lateral. This happens in the 24" dirt area between house and driveway, and is hand dug.
-New grinder ejector pit serving basement connects to reworked gravity drain.
Option 2:-First floor gravity drains in basement reworked to exit foundation walls ~18" below grade
-New high sewer line then pitches towards front yard, once clear of the house excavate for new vertical drop to connect to existing sewer lateral. This happens in the 24" dirt area between house and driveway, and is hand dug.
-New grinder ejector pit serving basement connects to reworked gravity drain.
Several plumbers who have walked the job have recommend this for cost and labor savings:
-Keep existing sanitary line to remain up to where it enters the building footprint
-Rework first floor gravity stack to accommodate connecting the basement pit discharge at the top of the stack in the basement.
-New PVC to connect to existing line outside building footprint (no-hub fitting) all the way up to where the ejector pit connects
-I would revise my drawings and provide the city with the updates
Option 3:-Rework first floor gravity stack to accommodate connecting the basement pit discharge at the top of the stack in the basement.
-New PVC to connect to existing line outside building footprint (no-hub fitting) all the way up to where the ejector pit connects
-I would revise my drawings and provide the city with the updates
Similar to option 1, but run high gravity drain pipe inside along foundation wall. I'd rather not do this as I lose 5"-6" precious inches of livable area from my basement remodel, and would require I dig up a well groomed juniper bush I have spent years nursing back to health.
So, in my mind option 1 is the 100% correct way to do this. It's more effort and cost, and I don't mind that. But every plumber I've solicited bids from says they done dozens of overhead conversions like option 2 and claim they've never had issues with water back up getting into the basement.What are the downsides of Option 2's design that a lay person may not be aware of? Functionally it's the same, but instead of poop water backing up outside the footprint of my home, it backs up inside but is contained by the sealed PVC sanitary stack.
If option 2 is acceptable to you all, would it be reasonable to request that the new sanitary stack be pressure tested?