I currently have a shower running into the waste seen in the below pictures. It did originally have water in it up to about 12 inches from the top. I am looking to add a toilet as the room only has a shower. Can I simply dig down until I can remove the square drain and slip on a new piece of soil pipe and connect up the WC. Do I also need to add an air admittance valve. At the moment it simply has a drain cover on
Please ask if you need any more info
Please ask if you need any more info