Plumbing back up. Should I replace pipes under the house?
Since buying our house (built in 1967), we have had some minor back up issues... kitchen sink mostly, which was cleared by calling a plumber to snake it. Recently, we had a huge back up in the master bathroom. Sinks, shower and toilet all backed up. Plumber came and said we need to consider replacing the sewage pipes both under the house and the one out to the street. He said he would come back and use a camera and see if the blockage is happening under the house, and if not, we should replace the main sewage pipe. Any comments? I just want to make sure we aren't being taken for a ride.