Hi, As a guest, I read a thread somewhere on this forum that discussed pumps. Mostly, they had problems with the pumps when the faucets were open. So, I just joined hoping someone can offer advice. My problem with the Shurflo model 4008-101-A65 is that it cycles on and off every 1-3 seconds when the faucets are closed. There are no leaks as we have used the RV for a month. All faucets are pressurized and work perfectly when in use. I just drained the tank and lines, cleaned the inline filter and refilled the tank. Same problem. The RV is almost 2 years old and we did not have this problem until we took it out of storage a month ago. Any ideas would be greatly appreciated.