Three flat story and ahalf DWV system
First thanks for being here on the internet for people asking questions.
We have a custom built 1945 three flat garden basement apartment Brick, with apartment(front) directly above in the front of the house,(70 feet ) long full attic. And a apartment also on above ground level in rear. So its base apt front ,with full basemant rear i.e. laundry room heating rec room etc and above front half and rear half and attic above housing (storage) catch basin in rear of building outside . No power systems all gravity system, below ground piping to city sewer system. Basement apt. and front apts. Are connected to one stack pipe and laundry and apt rear kitchen sink connected to another stack pipe . Rear apt. has toilet and tub on oppisite side encluding a third stack vent for that system. Front apt and basement apt above and below each other are the same lay out , kitchen sink in the middle with bath room Toilet ,tub, sink ten feet away to the front. Or right , problem is basement apt, has sewer gas coming out of wall from 1 1/2 dwv system of kitcken sink, both sinks have a histroy of clogging and filling the basement one up because they connected to same dwv line , Dwv line in basement apt kitchen sink 1 1/2 is running along gouged out concrete foundation to toilet stack AREA but is not connect to toilet stack as I removed water from toilet to listen for running water to this stack from kitchen sink and don't hear any,
So that means dwvc must be going to catch basin?? No drawings on this house so I am up for grabs and how its put together. Is there normally a second 4 inch line under house taking kitchen sink water to the catch basin and using the same dwv system as the toilet stacks for venting?? And being I have sewer gas coming out of wall (outside wall) does this mean I have pipes rotted or separated at the joints to the dwv system to the catch basin?? That would mean tearing out the basment apt kitchen wall and cabinets to find out , so anyhelp and thought would be very helpful. I was looking on internat for layout info on common systems but couldnot find any I would think that this would be typical layout?? I don't see any water leaks or rotted piping I have many times rodded and plungered line only to get clogged again soon 2 months and sewer gas is getting worse. Bashed out part of the wall plaster 3 inches fron concrete foundation and found no rotted piping all visible piping is still sealed. We are very firmilure with grease going down the kitchen sink and freezing up as it hits the underground cold piping and causing blockage so we always drain our grease from cooking pans and freeze it and throw in the garabge but you never get it all no garbage disposials or dish washers either.
I also have a problem with flooring outside bathroom in hallway seems like rotted supports for oak flooring I wouldn't be surprised if this is tied together with possible broken piping from kitchen, but how?? System is all cast iron piping and iron pressure piping some copper replacments in other parts of house on pressure side. All kitchen sinks and baths are on outside walls.
Thanks Douglas Star393
Discription of system is clear now
Back to my original problem which is sewer gas coming out of the wall from this dwv system that must connect to the 4 " cast iron main vent stack i guess i have alot of walls to tear down because the 1 1/2 dwv piping must have rotted or torn apart from the 4 " system at the bathroom were it joins the bathroom sewer system as this sink doesn't go to the catch basin grease trap it goes directly to the main via bathroom 10 feet away from kitchen sink I guess its camera time to really find out, as I do have a problem with kitchen flooring getting weak and hallway flooring outside bathroom going bad as batroom floor is concrete with ceramic tile so some of the water is spilling out of piping into building and running to flooring somehow.
Any thoughts on this problem
Douglas