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Author Topic: How long can a pump run with no water?  (Read 1162 times)

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Offline Jerry

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How long can a pump run with no water?
« on: May 15, 2007, 08:02:26 AM »
Hopefully it will never happen, but who knows what can occur when a "sitter" is there?
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Offline Bonnie

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Re: How long can a pump run with no water?
« Reply #1 on: May 15, 2007, 09:49:57 AM »
Jerry you are worrying too much.. :o

Even though I've been there, done that. {nono}

I've got a couple of el cheapo Laguna pumps that have gone dry several times and so far so good.  But they haven't gone for more than an hour or so.

With my sequence pumps, luckily this has happened one time and it was only a few minutes. ( I think)
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Offline gander

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Re: How long can a pump run with no water?
« Reply #2 on: May 15, 2007, 10:22:42 AM »
I have a tsurumi submersable that has an overload and it cuts off if it gets hot. I dont know about my sequence pump though.
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Offline rcr203

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Re: How long can a pump run with no water?
« Reply #3 on: May 15, 2007, 11:25:52 AM »
I know the maxflow Laguna pumps I use have some sort of sensor where they shut down somewhat based on the waterlevel, and will click back on when you fill back up. 
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Offline Jerry

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Re: How long can a pump run with no water?
« Reply #4 on: May 15, 2007, 12:01:36 PM »
Mine is a Sequence.
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Jerry
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Offline gander

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Re: How long can a pump run with no water?
« Reply #5 on: May 15, 2007, 02:07:11 PM »
You know Jerry I wonder if it would hurt the pump at all to run dry. Its not water cooled. It has an impeller of some sort to move that water but I wonder if it would hurt it to run dry.
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Offline Jerry

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Re: How long can a pump run with no water?
« Reply #6 on: May 15, 2007, 04:32:22 PM »
Early on in ponding mine did run dry, a Laguna.  The water level had dropped and I wasn't aware of it.  Soon as I added water it ran fine.  How long was it thirsty? No idea.
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Offline Bonnie

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Re: How long can a pump run with no water?
« Reply #7 on: May 16, 2007, 08:13:09 AM »
Yes a Sequence Pump would be expensive to replace.

Hum.. good thought Gary but I thought most pumps were impeller driven...
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Offline gander

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Re: How long can a pump run with no water?
« Reply #8 on: May 16, 2007, 08:16:43 AM »
They are bonnie but submersable pumps are cooled down setting in the water. The motor should not get hot on a sequence pump since its not water cooled.
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