We are staying with friends in Castle Rock, CO, minimal electric and fill our fresh water tank about every 4 days. Our pump has been very reluctant to deliver any volume or pressure, sounds like a car starter with a weak battery, and after 30 seconds or so, noise increases to normal and water comes normally. But sometimes the pump will not shut off. I woke up from a dream at 3 AM today and remembered I had replaced the pump last December, during a frozen water system time, and still had the pump I took out. Just got done reinstalling the old pump, and works great! At least for now. I thought this may be of value to all the great people in the GDRV community!