Plumbing Observations -Camera inserted into the old tub drain -Drain has signs of corrosion and build up -The camera steps up over build up on the bottom of the pipe -Customer would like to increase the size of the pipe to convert from tub to a shower drain. -The old tee for the tub is not to code and has not slope so the camera cannot to down the riser pipe to determine if the line is 2". -Our fear is if you connect to that existing drain line whether you're installing a tub or a shower, the line will continue to deteriorate and there will be back ups.