Pump not pumping water

Has the water tank been filled with a hose ?  A city water connection may not fill the onboard tank.

Thanks Charlie.

Thank you for asking the obvious as these are often overlooked.

The TT is a 2015 Rockwood mini-lite.
1.  Yes, last year everything worked well.
2.  Yes, the FW tank is full.
3.  Pump is hooked up correctly.  Suction side is hooked up to a new hose running to the bottom of 
     of the full FW tank.  Output side runs to cold water / hot water tank.
4.  Small glass filter was cracked so he took that out and installed a piece of hose instead / I think
     he ought to replace this with another filter, obviously it is there for a purpose.
5.  Not sure what you mean but he has done this with all 3 pumps in his possession (see above post).  He has run each off of power that runs through the trailer, they will purge any water that he has physically put into the suction side of the pump.  When he hooks up the hose to the FW tank, no water pumps through the pump.
6.  Not sure on this, will have to ask.  Why does the fitting need to be clear?
7.  I will ask him about this as well but I believe there is only one fitting on the suction side, the one that connects the hose from the FW tank to the pump.

Thank you for the checklist, when I hear back I will give an update.

Thank you David, I will forward this to my friend.

Originally posted by jato Thanks Charlie. Thank you for asking the obvious as these are often overlooked. The TT is a 2015 Rockwood mini-lite. 1.  Yes, last year everything worked well. This answers a lot and says everything should be hooked up correctly. 2.  Yes, the FW tank is full. 3.  Pump is hooked up correctly.  Suction side is hooked up to a new hose running to the bottom of       of the full FW tank.  Output side runs to cold water / hot water tank. 4.  Small glass filter was cracked so he took that out and installed a piece of hose instead / I think      he ought to replace this with another filter, obviously it is there for a purpose. 5.  Not sure what you mean but he has done this with all 3 pumps in his possession (see above post).  He has run each off of power that runs through the trailer, they will purge any water that he has physically put into the suction side of the pump.  When he hooks up the hose to the FW tank, no water pumps through the pump. The question was to determine if the 12V was properly connected/fuse good/etc. 6.  Not sure on this, will have to ask.  Why does the fitting need to be clear? All fittings, strainers, etc. need to be clear of obstructions. 7.  I will ask him about this as well but I believe there is only one fitting on the suction side, the one that connects the hose from the FW tank to the pump. Thank you for the checklist, when I hear back I will give an update.

One other test would be to run a short piece of hose directly from the pump to a bucket of water and see if it pumps all the way through the faucets. The same test could be run using the winterization valve. Somehow the suction side is open or the output side is blocked. Maybe the winterization valve is defective.