Hello! We just moved into a new home and noticed that the master bedroom toilet seems to make a flushing sound or run water spontaneously. It does not run continuously, just once every hour or so you will hear the water sound like a flush, then it stops. Any ideas on how to fix this? Thanks!!

A branch of my steam radiator system has a cut pipe in the crawlspace because I recently removed a radiator. The pipe is either cast iron or steel, I'm not sure which (it's about 90 yrs. old). The pipe is 1 1/2" diameter and is a branch of the main 3" pipe that services the entire house. In order to run my heating system I have to cap that pipe. I've used a massive pipewrench and all my weight and cannot make it budge. Would heat help? The pipe has some kind of cement around the outer edges of the threads. Failing that, is there any way to cap a cut end that has no thread on it?