If it's threaded, yes. Fittings are usually difficult to remove because of rust and build-up on threads.
You use a 'Robar' fitting, which is essentially a rubber sleeve with large hose clamps to tighten it.
The cost to replace a cast iron drain pipe can vary depending on factors such as the length of the pipe, the complexity of the installation, and the location of the pipe. On average, homeowners can expect to pay between 1,500 to 3,000 for a professional to replace a cast iron drain pipe.
Hit it with a sledge hammer.
Where? What is your question?
Loosen the clamps and use some elbow grease to twist the fitting into the desired position.
By cutting in a cast iron Wye so the flow enters the sewer line (soil pipe) at a right angle
A cast fitting that is shaped like a TEE and used either for drainage or venting
NO you cannot heat as any flame can cause a severe explosion and the very least crack the CI fitting The threads have to be cut out gently and possibly re tapped
To distinguish between cast iron and malleable iron pipe fittings, look for surface characteristics and markings. Cast iron fittings typically have a rougher, more brittle surface and may show signs of rust or corrosion, while malleable iron has a smoother finish and is more ductile. Additionally, malleable fittings are often marked with "M" or “Malleable” to indicate their type, while cast iron fittings may lack such markings. A simple test involves tapping the fitting; cast iron produces a dull thud, whereas malleable iron has a sharper sound.
Term used with cast-iron, PVC, CPVC and ABS pipe. Cast-Iron; The plain end of a cast-iron pipe. The spigot is inserted into the bell end of the next pipe to make a water tight joint. PVC, CPVC or ABS; A male end of a fitting the same size as the pipe that is inserted into the slip (hub) end of a fitting.
With a compression mission ring
from the hub to the spigot