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Old 07-18-2010, 10:58 AM   #1
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Sump pump humming but not removing water


Our sump pump is about 10 yrs old. It's been working fine until now. This morning I noticed that there was some water in the pump well but not enough to trigger the pump. IN the past when I wanted to get rid of the water anyway, I would raise the white floater which would trigger the pump. Today I did this but while the pump seemed to get activated -- I heard humming noise -- water was not sucked out. Is the pump broken? Clogged?

Thanks much!
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Old 07-18-2010, 11:17 AM   #2
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Sump pump humming but not removing water


Lift it out of the pit and see if the intake has some crap stuck in it.

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Old 07-18-2010, 04:02 PM   #3
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Sump pump humming but not removing water


The pump looks to be a Zoeller brand. That is a very good pump. but at ten years old it needs to be replaced. On the side of the pump housing near the bottom should be a small hole about 1/8" diameter. That hole in your current pump could be plugged, causing it to be air locked and therefore not pumping. Also, about a foot up on the discharge pipe below the check valve there should be another small 1/8" hole. Both those small holes are VERY important to discharge trapped air. Go here for installation instructions https://app.qleapahead.com/rtp/libra...asset=92494,63 and read about the weep holes.
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Old 07-18-2010, 08:33 PM   #4
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Sump pump humming but not removing water


Quote:
Originally Posted by rustyedge View Post
The pump looks to be a Zoeller brand.
rustyedge, thanks. At this point I am not ready to replace it but might do it soon. In the meantime, I want to make sure it it can operate with minimal maintenance.

I actually did not have to pull it out for cleaning. All I did was lift it a bit and move it a couple of inches to the side. It started pumping again. Does this mean that some particular hole got clogged?

Thanks.
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Old 07-18-2010, 09:29 PM   #5
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Sump pump humming but not removing water


Probably, yes. You should pull it out and maybe clean the sump area. roll the pump over and check the inlet. It's an older Zoeller pump but they will last many years.
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Old 07-18-2010, 09:45 PM   #6
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Sump pump humming but not removing water


Yes either the pump inlet is blocked by something or the bottom weep hole is plugged. Yours may not have a second weep hole in the discharge pipe, but it should have one. I always install a tee about a foot up and plug the branch of the tee. Then drill my second weep hole in the bottom of the plugged branch. That way the water stream shoots straight down back into the basin and doesn't splash outside the pit. I have seen pumps work for years and years without that second hole, then one day the pump gets air locked and the pit doesn't pump out and basements get flooded. All sump pumps when using a discharge check valve regardless of brand name need both weep holes for reliable operation.

Also when you eventually replace the pump replace the check valve too.

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