Originally Posted by urnmor
Our water pump seems to have a mind of its own lately and turn itself on even if no faucets are open. Can anyone explain why?
If you do not flush the air from your hot and cold water lines, you probably have some air trapped in the line. Most likely the shower as that is the last place I even bleed the air out of our system.
If you have considerable amount of air in the system, it will run and not get to pressure to stop running.
If it is a small amount of air in the line somewhere, toilet, sinks or shower(s) the pump will run for a second or two and quit.
Take a water hose on and attach it to your outside "city water" fixture. Run water into the system and bleed your interior fixtures any air. It will spit and bubble. When it begins to run clear, go to the next. Then when they all seem to be bled, one more time. Sinks, toilet and shower. Even the outside shower could be the culprit. The water pressure from your outside hose will do the job.
When traveling ALWAYS have the water pump OFF.
When pressure is not needed, just flip the pump to OFF. When pressure is needed, ON.
Since we are usually off the grid, we are on battery power and do not need the water lines under pressure until we need it to be.
I flush the water lines every time we are ready to leave home. You also need to have enough water in your fresh water tank so that the water pump does not push air back into the system. Otherwise, you go back to the beginning of this post and bleed them again.
This works perfectly... if not, then you can go to option B to Z.