Savan Posted April 28, 2009 Posted April 28, 2009 Im trying to find a battery operated pump that has good lift but the best I can find is 18". If I get an adapter to decrease the hose size from 1'id to 1/2'id, will that increase the lift to 36'? Share this post Link to post Share on other sites More sharing options...
Nuclear Posted April 28, 2009 Posted April 28, 2009 Im trying to find a battery operated pump that has good lift but the best I can find is 18". If I get an adapter to decrease the hose size from 1'id to 1/2'id, will that increase the lift to 36'? Why do you want a battery operated pump? There's too much risk involved if the batteries run low or possibly out of juice. The MCP-355 and other 12v pumps draw so little power that some can be powered by a fan header. Share this post Link to post Share on other sites More sharing options...
Savan Posted April 28, 2009 Posted April 28, 2009 (edited) its not for a pc, its for a school project, and I dont want to spend that much Edited April 28, 2009 by Savan Share this post Link to post Share on other sites More sharing options...
paulktreg Posted April 28, 2009 Posted April 28, 2009 How much water are you looking to shift? Car windscreen washer pumps are quite powerful and you could probably pick one up very cheap from a car scrapyard. Hope this helps. Cheers Paul Share this post Link to post Share on other sites More sharing options...
hardnrg Posted April 29, 2009 Posted April 29, 2009 You could power a Laing D5 from a car battery (they are rated 8-24V so could cope with 12V +/- 4V), and that would give you a lot of lift... Along the same lines, as Paul says, any pump from a car would run at ~12V and give decent performance... so scrapyard seems like a good bet Share this post Link to post Share on other sites More sharing options...
airman Posted April 29, 2009 Posted April 29, 2009 to answer your question about increasing/decreasing the size of the pipe to increase lift, technically yeah. the mass of the water being lifted would be less (smaller diameter X the same height). but, the pressure at the bottom of the column is the same regardless of diameter: p = p(o) +R(g*h) (pressure = air pressure + density of water * gravity * height). Share this post Link to post Share on other sites More sharing options...
Savan Posted April 29, 2009 Posted April 29, 2009 I got a windshield pump, and it works really well. Thanks for the help Share this post Link to post Share on other sites More sharing options...
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