HOW TO REPLACE ANGLE STOP VALVE NO FURTHER A MYSTERY

On inspection, the plumber (who was superb) suggested that a different pipe/line had to be put in as it absolutely was ruined. To take action, he needed to Reduce at the rear of the drywall to entry the pipe and install a new t-connector and a brief stub-out to feed the toilet. He plugged this work in to his function Personal computer and it spat o