We have a 35 foot hand dug well. We have lived here for 3 years and never had a problem until now. For the last month or so we have noticed that when turning on the outside hoses to water the lawn there is alot of air. Now the toilets and sinks in the house seem to spit. At first it would go away but now I can set a sprinkler and let it run for an hour and it spits the whole time. We have no problem with pressure and seem to be able to use alot of water (showers, laundry, watering) just like always. I have listened to the main pipe coming into the house and can hear air. Any ideas?? Thanks