Hi, my name is Matt. I've browsed this forum from time to time and have found some very good advice. I've fixed, replaced, renovated other plumbing in my house and now its time for the basement bathroom. So far I've removed all of the old cast iron/galvanized plumbing that was set in the old concrete raised floor. I also cut out 10' of the main cast iron drain pipe and replaced it with PVC. Now I need to start thinking about the plumbing rough-in's before i pour a new floor.
The existing basement floor was blocked out under the old bathroom footprint. I'm not sure why because none of the old plumbing actually went below the existing floor level. I do not know why the builder chose to run the plumbing above the slab at this location. The basement floor drain (not shown in the picture) is buried below the slab and connects to the sewer line in the back yard. Either way I'm stuck with what I've got and that means another raised floor. I'll be building it out of wood though.
Pictured below is:
Cast iron pipe: 4" main drain to city sewer.
PVC Pipe: 4" main drain 10' PVC section. 10' further down is the main stack with main vent (not visible in picture).
PVC Fittings: Proposed locations of drains for new fixtures.
Blue Lines: Drain piping - 3" for Toilet, 2" for Shower, 1.5" for Pedestal Sink
Green Lines: Option 1 - Vent lines running horizontal then up in walls and eventually joining. There is an existing 1.5" vent for the bathroom but obviously that's not up to code anymore. Most likely I'll use an AAV on the wall above the main drain line.
Red Line: Option 2 - Single vent on main drain going to new AAV.
What do I have right? What do I have wrong? I'm not a professional plumber but I do realize the importance of proper draining and venting so criticism is welcome! Any advice to help me out with this project will be much appreciated. Thanks for taking the time to read.
The existing basement floor was blocked out under the old bathroom footprint. I'm not sure why because none of the old plumbing actually went below the existing floor level. I do not know why the builder chose to run the plumbing above the slab at this location. The basement floor drain (not shown in the picture) is buried below the slab and connects to the sewer line in the back yard. Either way I'm stuck with what I've got and that means another raised floor. I'll be building it out of wood though.
Pictured below is:
Cast iron pipe: 4" main drain to city sewer.
PVC Pipe: 4" main drain 10' PVC section. 10' further down is the main stack with main vent (not visible in picture).
PVC Fittings: Proposed locations of drains for new fixtures.
Blue Lines: Drain piping - 3" for Toilet, 2" for Shower, 1.5" for Pedestal Sink
Green Lines: Option 1 - Vent lines running horizontal then up in walls and eventually joining. There is an existing 1.5" vent for the bathroom but obviously that's not up to code anymore. Most likely I'll use an AAV on the wall above the main drain line.
Red Line: Option 2 - Single vent on main drain going to new AAV.
What do I have right? What do I have wrong? I'm not a professional plumber but I do realize the importance of proper draining and venting so criticism is welcome! Any advice to help me out with this project will be much appreciated. Thanks for taking the time to read.
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