I use this to pull water from my well to wash cars and water my yard, etc. Has worked flawlessly for 10 years.....This winter I unplugged my pump thinking I wouldn't use it over the winter. This is the first time I've unplugged it. I was all excited about washing my car (great weather) today so I plugged it back in and now it runs like always but my water pressure gauge doesn't move at all, hence no water. Is there something I need to do to get the pressure back (short of buying a new pump) . I notice that there is a air valve on top of the pump...do I need to pump some air into it.....Any advice will be greatly appreciated.