The Delton magnetic water heater I use at home does not use the cold water valve at all. It has been used for more than three years and has not broken once. The after-sales service has no warranty card at all. I don’t know where I lost it to my relatives and friends after using it. They also say that this water heater works well. My home is in the Northeast in the coldest winter. When the temperature is more than minus 30 degrees, I still have hot water as soon as I turn it on.
In fact, it is not difficult to solve the problem in your home by replacing the cold water valve. Turn it off and just use hot water. Turn the temperature down to save electricity