You can best test and diagnose a residential hydronic heating system using pressure ports and balancing valves. However, few residential systems have either of these accessories. A commonly ...

Among a service tech’s many responsibilities is to pipe together refrigeration system components. When piping a system together, a technician must decide which pipe size to use — it’s not always as ...

Q: Tim, I went to buy some plastic drain pipe, and after looking at all the types, my head started to hurt. I decided to leave the store and do some research. I’ve got several projects for which I ...