I have one and use it regularly. However, it no longer will syphon in
any liquid through the dip hose. I've cleaned and tested the intake
filter so it flows easily and the tube is clear.

Can anyone advise if it is possible to repair this condition? If I
disassembled the unit to gain access to where the intake hose connects
to the pump, is there anything that I can do at that point?

Thanks in advance for any suggestions.