Hi All.

Hopefully you can answer this question, or give me some advice for a friend of mine.

I was speaking with my friend, and she says that the pipes are banging constantly, with no water running every 3 or 4 minutes. (Water hammer as far as i can tell... I'm not there now...)

She says no water is running; but it was fairly cold -20C and now it has gone to approximately -12C (I'm Canadian...-4F to +10F)

I've been told that the lines have to be bled to clear this up; could the temperature change have something to do with it?