"WC means inches of water column (= 249 Pa), which is the common North
American pressure unit for low pressure gases (natural gas, air,
etc.)--although I doubt there are any plumbers today who actually measure
pressures with a water manometer. Conversely, I have never seen the English
nickname WC (for water closet, or toilet) used here in North America.
> -----Original Message-----
> From: Ian Moseley
>
> A Canadian company, Yeadon Domes, is in discussion with our Health and
> Safety people. The company sells air-supported structures and is
> resolutely non-metric. (I think their site www.yeadondomes.com uses
> metric once as a supplementary measure).
>
> They have produce a statement ref air flow with the rates being quoted
> in cubic feet at 1"W.C. and 1.25"W.C. Assuming the flow rate is nothing
> to do with flushing toilets, we can only guess that this some sort of
> overpressure measurement
>
>
>
