This water tank is age 16, and just began making loud pressure and gurgling type noises every time water is used to any outlet. I am concerned some kind of failure might occur this winter, if I am away from home for long periods. In case it is pertinent, we do have a significant sediment/salts issue from this well. But we have never had any trouble from this system otherwise. Thanks to any information.

There are snubbers and expansion tanks to solve this problem. You said you have a well, that is usually a 220 circuit. I f you leave home and no one remains in the house, simply open the circuit breaker for the well pump and you won't have to worry about any water problems in your home. I do it everyday.

Joel