Q&A

摘要

Q volunteer for my local water department. The pipes are all cast iron - four and six inch - within the water district. We have several and expensive breaks each year, mainly during the winter and spring thaw. Our water operator currently locates these leaks with a sounding device he acquired years ago. As you can imagine, it is labor-intensive and often we have to dig up whole sections of road just to find a leak or broken pipe.