Question: Recently the sewer line in my house backed up. The plumber who cleaned out the line discovered that tree roots were the problem. I've seen products that you flush down the toilet for this.

Q: What product do you recommend for killing roots in my sewer pipe? Someone said copper sulfate. Is that good? -- Charles A: Copper sulfate crystals indeed will irritate and kill roots in the sewer ...

Q: My sewer is backing up into my floor drain. I had roots cleared from the sewer line a few months back, but they seem to keep coming back. Any hints? A: For those not familiar with this issue, the ...

Q: I live in the San Leandro hills, where there is clay soil. Last week, water backed up into my toilets, tub and shower. A plumber tried to remove the obstruction but was unsuccessful. He returned ...