Is there any real way of telling that you cleared the blockage 100% without using a camera? (Well, 99% because I'm sure there is some dirty water spots or some light crud on the pipes if it's galvanized).
If some lawyer had you on the stand and said, "Mr. Sewer Guy, is there any proof that you cleared Mrs. Johnson's drain 100%?
I'm curious because I have a callback. Some guy put cat litter down his toilet about three weeks ago and I told him don't do it again. I had to pull the toilet on the main floor because all the toilets were working fine downstairs. This is also the toilet that sits right next to his cat's litter box. This is PVC piping also so the pipes are more than likely in good condition.
So I put on a spade bit to power through (wish I had my 2 1/4" Spiral cutter that day) and noticed that after 10', the water in the top half of the pipe went down (it was a flange 90 degree elbow), then after going through some more, the bottom half of the pipe was clear of water. It just flushed down. I flushed toilets and ran water for a good 1/2 hour and things were good.
So now it's been about three weeks and he calls me back saying its clogged solid. This bathroom is the master bathroom so I'd assume they use it quite often.
By the way, this house is nice on the outside and REALLY messy on the inside. So, I could almost assume that they got lazy and just wanted to dump more cat litter down the toilet, but how can I be sure without a camera?
Anyways, thanks for reading this. Just wanted your thoughts on everything.