What's wrong with my sump pump? (1 Viewer)

[iinmilwaukee]

I recently replaced a broken sump pump in my basement (put in Simer submersible 1/3 HP, 1 1/4 in.) . The new one pumps the water out ok, but at the end of its "cycle" it shudders pretty badly for about 10-15 seconds making a loud racketing sound that can be heard even on the second floor. The old one never did that. Does anyone know what the problem could be? Should I just try buying another one? Any recommendations on the brand/model?

Thanks,
Igor

 

[KLF]

Sounds like it's sucking air. Can you adjust the float switch so it doesn't draw down so far?

 

[Toyo FJ40]

Does it shutters after it turns off or before? If it's before it shuts off than it's what KLF said , if after then it's water draining back through the check valve making it "thump thump thump". If thats the case get a better check valve.

 

[iinmilwaukee]

Thank you KB1OSF.
It sounds like a good idea, but I am not sure whether that could be done since the floater is the "flapper" type, not one that slides up and own a metal shaft.

 

[iinmilwaukee]

Toyo FJ40, today it's bitterly cold, and there's practically no water in the well. I'll watch and try to find out.

 

[iinmilwaukee]

Toyo FJ40, I finally found out: it shudders after the pump shuts off. So, as you suggested, it must be a check valve - I actually have two of them, one about 2' above the pump, and the other 3' higher above the first one. Do you have any idea which one is a more likely culprit?

 

[itbrokeagain]

Get rid of one of them. You only need one.

 

[iinmilwaukee]

itbrokeagain, I also thought two were not needed, but I've always had both and when asked a guy at a hardware store, he suggested I kept them that way. I'll now try to get rid of one.

 

[itbrokeagain]

The only time two would be needed is if you have 2 pumps or if you had a backup sump pump. Each discharge pipe would get its own check valve before they join together. Its possible getting rid of the second check valve will fix the issue also.