![Working on a home built in 1918. Replacing 4” cast iron drain with 4” abs. Don't have much space under house for all 4” or inside the true 2x3 walls to vent. Working on a home built in 1918. Replacing 4” cast iron drain with 4” abs. Don't have much space under house for all 4” or inside the true 2x3 walls to vent.](https://i.redd.it/working-on-a-home-built-in-1918-replacing-4-cast-iron-drain-v0-lc5x3o2i9ho81.jpg?width=4030&format=pjpg&auto=webp&s=1c3d0ff60ed4cc9713f88e8b3426b8763829e555)
Working on a home built in 1918. Replacing 4” cast iron drain with 4” abs. Don't have much space under house for all 4” or inside the true 2x3 walls to vent.
![plumbing - How can I replace this cast iron tee without increasing the width of the connecting pipes? - Home Improvement Stack Exchange plumbing - How can I replace this cast iron tee without increasing the width of the connecting pipes? - Home Improvement Stack Exchange](https://i.stack.imgur.com/sLmJM.png)
plumbing - How can I replace this cast iron tee without increasing the width of the connecting pipes? - Home Improvement Stack Exchange
![I just replaced an old cast iron stink pipe (or so I think it was cast iron, house was built in the 60's). Ended up replacing it with PVC pipe with some I just replaced an old cast iron stink pipe (or so I think it was cast iron, house was built in the 60's). Ended up replacing it with PVC pipe with some](https://i.redd.it/cv2m2fpiovx41.jpg)
I just replaced an old cast iron stink pipe (or so I think it was cast iron, house was built in the 60's). Ended up replacing it with PVC pipe with some
![How to replace cast iron pipes under your house without digging - Trenchless Epoxy Pipe Lining Sewer Drain Replacement Repair How to replace cast iron pipes under your house without digging - Trenchless Epoxy Pipe Lining Sewer Drain Replacement Repair](https://www.trenchless-pipelining.com/wp-content/uploads/2014/07/images.jpg)