DIYbanter - View Single Post

wrote:
If I recall correctly , the air lift method works by adding air to the
column of water in the pipe. With the added air, the column weighs
less and the water/air column will rise to the height where its weight
is the same as the weight of the pure water.

Not a great explanation, but anyway the lift of such a system is
limited. In short I don't think it will work for your application.

What would probably work well is the Harbor Freight 12 volt marine
utility pump. 240 gallons per hour, 23 foot lift.
It is currently on sale at $25. LOT NO 9576

Dan

Even good 'marine' pumps tend to be rated for head at ZERO flow and flow
at ZERO head. Also they do not often maintain their ratings when they
age a bit. It also may have been rated at 13.8 V or even 14.4 V and if
run at 12V will underperform. Rough rule of thumb for boat pumps, buy
twice the pump you think you need.

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Ian Malcolm. London, ENGLAND. (NEWSGROUP REPLY PREFERRED)
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