Help! Can you use a submersible pump out of water?

[Cossack1977]

I need to know if you can use submersable pumps out of water?
The pump i have bid on ebay is a RESUN sp-9000 3500l/h and not until after i bid did i think to ask the question if it could be used out of water.

If not why cant it be?

Ive got 9hrs to go on ebay before its mine so if its no good i need to cancel my bid soon.

 

[smithrc]

does it have an intake pipe and an out pipe?
if so i can see no reason it cant be used un submurged.

 

[Cossack1977]

the picture on the box looks like it can but the picture of the unit only shows one pipe.

here's the link on ebay:

http/cgi.ebay.com.au/ws/eBayISAPI.dll?Vi...7702934989&rd=1

here's the link to resun:

http/www.resun-china.com/anniou/Eng/product_new5.HTM

 

[daza]

I'd say it can't be used out of water as it is named "submersible". I have a (different kind of) powerhead that says "not to be dry run", so probably the same will apply. Might be wrong though.

edit...bit late with my reply there anyway!

 

[Lateral Line]

Almost without exception, pumps designed to run submerged will use the surrounding water as coolant. Running them dry will burn them out in a very short time.

For this reason, people running powerheads on sponges or ugf's should turn them off when changing water if the water level is to be dropped significantly relative to the powerhead.

 

[Cossack1977]

Almost without exception, pumps designed to run submerged will use the surrounding water as coolant. Running them dry will burn them out in a very short time.

For this reason, people running powerheads on sponges or ugf's should turn them off when changing water if the water level is to be dropped significantly relative to the powerhead.

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wouldn't the water running through the pump cool it?
on the resun site ehich is hrd to understand is syas that they can run in and out of a fish jar? ( whatever that means)

the seller says they have to be run in water?
im going to try them as i have planned anyway and see how they go.

 

[Lateral Line]

Not necessarily. In some models the pump and the motor that drive it are connected by a shaft, thats all. The pump compartment is cooled, but it is the motor that runs hot. I'm not saying that is the case, but simply assuming the water running throungh the unit will be sufficient is making assumptions which may not be valid.