I'm replacing my shower tub on my 35 year old house. The PVC drain runs under my 5 inch thick concrete floor through a 1 ft square opening. Deep under (about 1 1/2 going to the right side) is the main drain pipe connector. Somehow because of age the pvc pipe broke from the t-connector. Is there a simplier way to remove, replace, connect the pipe again to the t-connector? Or should I have to remove some of the concrete floor to widen up and get easy access to the t-connector on the side? Is there a chemical or solution to remove the old glue to that connector? Any advise I can get? Anything...