Hello, I have a problem in both my master and 2nd bathroom. When an appliance is on that uses hot water or you flush a toilet the showers in both bathrooms will lose hot water pressure this problem has been going on for about 2 years and is getting steadily worse. Just some info on house it is 20 years old, has copper pipes and a new water heater of about a month. HELP!

Thanks, Michael

Have your water meter and pressure reducing valve checked( if you have one).