Finally a truly creative & good piece of preventative advice we all can use. I would never have thought of this. Also a great little reminder to send to your clients. Nobody wants this to happen to their pipes!
Turn the water knobs under sinks off and back on at least once a year, preferably every six months. When the shut-off valves beneath sinks and toilets go untouched for years, mineral deposits can cause them to seize up and the valves can’t be opened or closed. Often the only recourse is to hire a plumber to cut the valves out and replace them, at a cost of hundreds of dollars.
Add this to the list of things to do when the time changes....check fire extinguishers, smoke alarms, etc. Five minutes or less could save you money AND headaches!