This sprayer has gave me fits from the start.... I only use it once or twice a year & have already replaced the original pump.... Well..... it's at it again... The best I can figure is there must be a problem with the pump again... I'll have good pressure & then no pressure.... I pulled the outlet hose off & it was definitely pumping at that moment but it continues to drop pressure on & off... I guess my question is, is it possible for the pump to work intermittently? The original pump just flat out quit working.... What's the life span of one these pumps if it's been well maintained? The second pump was from TSC...