I encountered an unexpected obstacle in the course of adding a washer hookup to an existing sink drain. My original post is here:
Thread 'Adding Washer to Existing Kitchen Sink Drain' https://terrylove.com/forums/index.php?threads/adding-washer-to-existing-kitchen-sink-drain.98440/
Turns out that the iron bushing that was threaded into the side of the cast iron stack is 3.5". So I cannot use a threaded 3" or 4" PVC fitting. I can get an iron 3.5" to 3" threaded bushing from a plumbing supplier for about $43. I also found a rubber 3.5" to 3" donut at a big box store for $7. The existing threads in the cast iron stack are rough as a cob. The original bushing was threaded in only a couple of turns. All the threads after that are covered with corrosion.
My question is: Should I pop for the iron bushing, or will the donut work (assuming I can get it and the 3" drain pipe into the fitting)?
Thread 'Adding Washer to Existing Kitchen Sink Drain' https://terrylove.com/forums/index.php?threads/adding-washer-to-existing-kitchen-sink-drain.98440/
Turns out that the iron bushing that was threaded into the side of the cast iron stack is 3.5". So I cannot use a threaded 3" or 4" PVC fitting. I can get an iron 3.5" to 3" threaded bushing from a plumbing supplier for about $43. I also found a rubber 3.5" to 3" donut at a big box store for $7. The existing threads in the cast iron stack are rough as a cob. The original bushing was threaded in only a couple of turns. All the threads after that are covered with corrosion.
My question is: Should I pop for the iron bushing, or will the donut work (assuming I can get it and the 3" drain pipe into the fitting)?