![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
![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://preview.redd.it/working-on-a-home-built-in-1918-replacing-4-cast-iron-drain-v0-lc5x3o2i9ho81.jpg?width=640&crop=smart&auto=webp&s=0581df7306f41192c27b43b9c5b752b93f07ff30)
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 - Seeking suggestions for extending an old drain wall tube - Home Improvement Stack Exchange plumbing - Seeking suggestions for extending an old drain wall tube - Home Improvement Stack Exchange](https://i.stack.imgur.com/EXp2z.jpg)