I have a plumbing/well water question. Recently our water flow has been stopping (during a shower or in the sink). The entire house water supply stops. Sometimes there is a noise - like air - as if we've been away for a month. Sometimes there is no noise at all, the flow goes down to a trickle and stops. It usually starts back up within a minute or two. We have a well and our house is about 12 years old. ---Also, this may be unrelated but the water coming into my washing machine has begun to smell sour, like sulfer. We have a neutralizer and water softner system which is up to date. I'm wondering if this is my washing machine, which is 13 years old. - Thanks for your help.