need overflow help

i just bought a eshopps pf nano and i dont know how to start it the most it does is the tube fill up have way and drains i thought the tube was supposed to be filled with water not air

 

Run a length of airline into the u tube and suck the air out while both ends of the tube are under water.

 

okay i have it running but i seen little bubbles slowly building up in the middle of the u tube will problems arise

 

yes it will stop if they get to big. A solution to that is to drill a hole at the top for a plastic airline barb and then connect airline and use a lift pump to pull the air out. You will run a line from the output of the pump to the sump for any water that get sucked up.

 

ill try it thanks

 

Watch my video

 

If air bubbles are building up in the U tube it means your return pump isn't strong enough. If the pump is properly matched with the overflow, the bubbles will always be forced through.