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reverse polarity on the fat sac pumps?

 
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sanddragon2004
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Joined: 27 Jun 2005
Posts: 152
City: San Jose

PostPosted: Jul 13, 2005 12:18 pm    Post subject: reverse polarity on the fat sac pumps? Reply with quote

does anybody know if you can reverse the polarity on the fat sac pumps to pump out the water out of the boat once its pumped in?
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downsideup
Soul Rider
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Joined: 29 Jul 2003
Posts: 344

PostPosted: Jul 13, 2005 1:05 pm    Post subject: Reply with quote

no, you cannot.
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AndyDeeJay
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Joined: 20 Jul 2004
Posts: 239
City: Belfast

PostPosted: Jul 15, 2005 7:49 am    Post subject: Reply with quote

Short answer - No

Long answer why -
The airator pumps wont actually pump air but once primed (all air removed) they do maintain a flow of water. The impellor used is made of hard plastic and simply flings the water axially presented to it to the perimiter of the casing. This water starts to swirl with the rotation of the impellor and exits the casing from a pipe optimally located on the perimiter. They are not capible of self priming either and require total submersion before they work at all.

If you reverse the motor, and put water in the perimiter or exit pipe, the same centrifical force opposes the required reverse direction of flow and the pump refuses to prime. Water refuses to pass.

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