I have a 4" drain in a school that has at least 90' of about 1/2" - 1" buildup on the bottom of the pipe. It looks like cement or mortar. A rented cart jetter would break off chunks, but it took for ever. My K-500 was able to power thru a huge buildup, bit the c-cutter doesn't scrape the bottom of the pipe clean. I was wondering if a chain knocker would work.
No announcement yet.
anybody ever use a chain knocker?