How to connect pvc to cast iron drain pipe at no pitch
I have wast line is iron cast pipe at the level. The contractor at cut half of this iron cast pipe and connect to pvc pipe. It is at the same level and no pitch at all. I wonder if there will be leak eventually in the future as the water will accumulate at the connector and eventually will leak. I have simililar problem for the gutter which connect at the same level and no pitch. The water will finally leak through the joint.
Is anyone know if the iron cast connect to pvc at the same level will eventually leak?
Thank you very much