On Thu, 28 Aug 2014 21:55:50 -0400, KC wrote:

On 8/28/2014 1:14 PM, Califbill wrote:
wrote:
On Thu, 28 Aug 2014 08:43:16 -0400, KC wrote:

That is the kind of pump I am thinking of putting in... Run the
compressor a couple times a week and fill the 250 gallon tank in the
basement. They are becoming more popular in dry areas and can be run
with a lot less power than a 3/4 horse, 240v pump..

I bet it is not that much less. You still bump up against physics.


Yeah, and I can't afford a learning curve..

You can do some rough calculations based on the cu/ft per min of the
compressor at 100 PSI (roughly 200' head) and convert that to gpm of
the water at 8 times that but I doubt it actually works that
efficiently. This would be the max possible.

I doubt it is more efficient than a submersible. Heat loss in compressing
air, the loss in pumping, etc. a 3/4 horse pump these days is fairly
efficient. I run a 1.5 and a 1 horse pump on my pool. 4 hours on the big
pump and 2 hours on the smaller booster for the pool sweep and my electric
bill is only about $50 more than not running the pumps. And the gold
dredgers use these, but the head is only a few feet, not a 100+ For their
air pumps.


Yeah, I am just looking for the cheapest installation, easiest to
replace. This system has no wiring or motors underground. I would have
to put a storage tank in the basement but 100 gallons would be plenty.

===

I wouldn't count on 100 gallons being enough unless it is a
pressurized accumulator tank that is constantly being replenished by a
pump. 100 gallons goes pretty fast when you have clothes washers,
dish washers, showers and flush toilets being used.