Can't even remember original problem started 2 mo. ago. Think there was just no pressure. tech. replaced pump in well and cleaned valves it worked when he left I put it on timer and it did not work .Each Zone comes on in order but no pressure. And I think maybe all zones are on at once just trickeling. Someone else came out and replaced valves went through the zones all working lots of pressure. Next day on timer all seemed to be working well . Next day on timer same problem as before.Each zone ...