In article ,
Rick wrote:

The element cannot possibly know what mechanism is used to
establish fluid flow through the filter. The only thing the
filter sees is rate of flow and as it clogs, differential.
Anyone who claims otherwise is ignoring some other factor or
talking BS.

ONLY if you're only looking at the filter.

The casing is a different story. For instance, I don't feel that the
Racor 500's center-screw, edge-seal casing could handle "high" pressure.
It "feels" safer to limit it to the 14.7# maximum vacuum differential.

In addition, the 500's plastic bowl seems quite adequate for up to 15#
suction, but I'm not sure I'd trust it to 15# (or more) pressure.

--
Jere Lull
Xan-a-Deux ('73 Tanzer 28 #4 out of Tolchester, MD)
Xan's Pages: http://members.dca.net/jerelull/X-Main.html
Our BVI FAQs (290+ pics) http://homepage.mac.com/jerelull/BVI/