In an earlier contribution to this discussion,
Andrew Mawson wrote:

Anyone know the pressure range to be expected in a low pressure gas
main ie the one presented to the govenor before it goes through the
domestic meter ? Obviously it will vary with demand in the area but
what are the limits?

I know on the consumer side of the meter it should be 20-22 mBar on
full load but would be interested to know how much range the govenor
has to work on.

AWEM

ISTR that in the days before new-fangled units like millibars were invented
duck, it came in at 20" H2O, and was governed down to 8". So, in round
figures, the input pressure was 50 mB.
--
Cheers,
Set Square
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