You can get regulators tha twill reduce the presure down to less than 1 PSI,
but be careful. These regulators can only handle about 20 PSI on the input
side so you will need 2 stages of regulation. You will also need a
professional grade compressor and perform regular overhauls on the
compressor or expect to repalce it about once a year.

"Richard I Landon" wrote in message
...
that is about all of my reasons..
it still lets me have the air method of water movement, with out the buzz
of the pumps..

reducing the pressure is not that hard because you can get regulators for
about $20 that will regulate down to 1 PSI.

My largest concern is oil in the air, I guess if I get one of the
"oilless" types it should not be a big problem..
plus I can put in oil traps..


On Wed, 9 Jul 2003 14:17 +0100 (BST), (Roger Sleet)
wrote:

You don't get the buzz of normal air pumps
You can site the compressor a long way away (in the Garage say) - because
of the high air pressure you don't get any flow loss.
You have an air compressor anyway, so why go to the extra expense of
buying a pump.

However, I can't answer the question because although I've seen it done
I've never gone into the idea in any detail. Reducing the pressure is
the
only problem that I can see, and you should be able to do that through a
reducing valve.