On Thu, 17 Jul 2008 09:33:46 -0700, Michael Diehr <md03@XOCHI.COM> wrote:

>Update --
>
>A homemmade manometer revealed that my (5 year old) Marshall 290
>regulator was only putting out 7 inches of pressure.   I stretched the
>spring and screwed the adjuster in full stop, which only took it about
>9.5 inches.  So probably my regulator is failing.

When you use your 'homemade' manometer, do you measure the differential
between the two water levels or only the rise in one side? Many people
measure only one side; the correct measurement is the total difference is
water level from one side of the U-tube to the other.