20 Most Recent Little Giant Submersible Fountain Pump - Page 2 Questions & Answers

If you have to add oil it is time to replace pump.

This is a plastic impeller on a brass hub. If the impeller is loose it is probally cracked or overheated and melted, ether way you will have to break the impeller off of the hub then you will need to break hub loose from shaft. You can do this by putting pump in a vise and putting a pair of vice grips on hub and giveing them a sharp hit in a counter clockwise direction. you will need to replace the seal and impeller and should check to be sure than you can get these parts before you start.

No there is not 2 speeds. That model is asychronous so power fluctuations can affect pumping. How clean is the plug end and how dry is the receptacle? Is there is chance a extension cord is used [code violation almost everywhere] in this hookup? Perhaps it's just debris circulation and restricting intake?

Take it apart and clean out the junk in the impeller cavity

a device called a flow restrictor is needed in this case , pond supply places can source this device as it needs be sized for the size of hose your using

sumerged pump oil is most allways a fire resistant (smokeless) type of mineral oil , when filling any pump allways allow for heat expansion !!!

lots of times you can fix a slow pump by reversing the flow of the pump , by shutting off power and forcing water back thru it with a garden hose , no dissasembly required !!!

if a pump connected to a gfci brkr is tripping it , gfci has detected a connection from hot wire to ground !! this could be a high resistance connection still allowing pump to run but "leaking" power to ground thru restance connection , this pump could become dangerious (if short gets worse) and should not be used for this application

if this is the type with the open frame motor (meaning its got no round cover) then i suggest you soak the pump (not the motor ) in hot/warm water for a bit , sugar from drinks mix has dried up inside pump not alowing pump to turn , hot water will soften sugar and allow motor to turn

test Gfi with any other three prong device that you can carry out there an test it with (drop light, vac cleaner,ETC.) , if gfi holds on! replace pump