You don't need a gauge, just some clear plastic tubing.

With at least a 4 foot section of tubing bent into a U shape, pour water
into one end until the bottom of the U has water coming up about a foot
on each side. Then connect the other end of the tubing to the propane
source. Slowly turn on the propane and the pressure will cause the water
to go lower in one side of the U and higher in the other side. Measure
the height difference between the water level in the 2 sides. The
difference is supposed to be 11".

You need to have a tiny bleed hole on the section of hose connected to
the propane. I use a finishing nail or some such to punch a hole. The
hole should let the water level return to the same on both sides when
the propane is turned back off. Make sure this happens or the reading
will not be accurate when the gas is on.

It does not matter how close the legs of the U are together. All that
matters is that you can measure the height difference with respect to
level ground.

Adding tea or coffee to darken the water first will help you see the
level better.

Mark

neil N wrote:

> Hi Mark.
>
> Checked the net for a Marshall web presence, but none, so can't find
> specs of what I used.
>
> Used the LP tank and Marshall reg ( "Marshall 605H LP Gas" ... "Model
> 150" ) from my Weber BBQ.
>
> Don't know what pressure it puts out as I can't measure pressure. (no gauges)
>
> Does one need some kind of inline gauge to read pressure?
>
> Flame looked quite health via viewer at inside bottom of fridge,
> though that doesn't mean too much.
>
>
>
> On 7/29/07, Mark Drillock <drillock@earthlink.net> wrote:
>
>>What regulator is on the BBQ tank and have you measured the actual
>>propane pressure seen by fridge while the cooling was bad?
>>
>>Mark
>>
>