What do you mean by never run water through them? Are you talking about drained down pipes or pipes with water in them that you physically can't run water through because they've been capped off?
Working my cohuners off in the back room!
boiler making vibrating noise like kettle|boiler making whistling noise boiler making humming noise boiler making load rumbling noise boiler making gurgling noise.
I mean water pipes in bathroom.. shower pipes to be exact. I go to a gym everyday and take shower there, so no need to waste hot water at home. but I wonder whether would it affect those pipes or not if not using them for a long period?