On Fri, 17 Apr 2015 09:24:09 -0700, wrote:

snip
The o-ring will be sealing against low pressure-basically water a few
inches deep. So the sealing cannot be helped by pressure or vacuum and
instead must rely solely on compression. The customer would rather use
stock o-rings that are available everywhere.
/snip
o-ring is overkill -- use flat rubber washer for face
compression seal.


--
Unka' George

"Gold is the money of kings,
silver is the money of gentlemen,
barter is the money of peasants,
but debt is the money of slaves"

-Norm Franz, "Money and Wealth in the New Millenium"