Finally putting in the kitchen island and installing a dishwasher. On a scale of one to NOPE… how difficult will it be for me to tie into an existing cast iron drain pipe? Easily accessible via drop ceiling in the basement.
You need to have a professional do it because it won’t be easy, and it needs a permit. If they house is ever sold it will bite you and the new owner in the but for not doing it legally. But yes, don’t mess with cast iron plumbing
depends on access i suppose. Get a quote first and go from there. The dishwasher would tap into the sink drain likely.
There are different products that is specifically made to connect modern pipes to cast iron pipes. That made it much easier.
Whatever you choose, run your plans by your inspector before pulling the permit…. free advice (after taxes). I’ve only tapped into plastic, never iron, but I like to read. The only way I have read about is drilling a hole in the iron for a “saddle” fitting, or cutting the iron square all the way through and using a plastic fitting. They have neoprene connectors with hoseclamps for the plastic-iron joint. If the overhead is just a line serving the kitchen sink, and the inspector OK’d it, I’d probably cut the pipe with a sawzall, de bur it with a dremel and hand files, and run plastic to the rest of the kitchen, paying attention to venting all the traps just as the inspector wants to see. If it was a 4″ main serving an often used toilet I’d hire it out. For two reasons. First, its overhead… iron and the snap cutters are heavy and being a noob I’d probably drop something and regret it. The other reason is that DIY often has curveballs. Consider the scenario your simply DIY job creates a crack or leak in the iron sewer main, making a mess and taking a bathroom out of action until the pros can get it ship shape.
Wheres the pipe located in relation to the dishwasher? Is it under concrete? In the subfloor? In the wall? Its not hard. As far as permitting thats up to you. You can potentially do it and noone will ever know as long as its a proper fix and it WORKS! If you decide to do it look at Fernco fittings. They can get you from cast iron to any other material. Its a rubber fitting versus PVC
They are supposed to be attached to the kitchen sink drainage…but if its to far away make sure you vent correctly..