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Old 09-18-2004, 12:09 PM   #1
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propane, measuring pressure

while restoring the 72 overlander, i installed a new regulator, the kind that switches to the second tank when the primary is empty. now that i'm on the road, i've had problems with pilots on the stove and h2o heater and also with the dometic refer when operating on gas. there was no improvement after the usual cleaning routines. i began to suspect that the gas pressure was too low. i took the black pastic cover off the back of the regulator, found an adjuster and cranked it down two turns with an allen wrench. now the h2o heater stays lit. i haven't confirmed an improvement with the refer yet. it's been on shore power and i don't want to risk getting my beer warm.

the question: has anyone tried to improvise a manometer using clear plastic tubing in a "u" shape to raise a column of water and thus measure actual pressure? it's been a while since i read the dometic specifications but i seem to remember something in the range of 10 inches of water as the correct gas pressure (measured at the appliance).


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Old 09-18-2004, 02:06 PM   #2
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10-14 water columns

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Old 09-18-2004, 07:34 PM   #3
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I haven't tried this, but it seems pretty sound.
Michael & Tracy
1989 345 Motorhome
We live for the moment, 'cause when you get there, it's gone...
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Old 09-19-2004, 01:22 AM   #4
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Wow, you learn something new every day.
Just adding my 2 worth

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1975 31ft Sovereign International
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Old 09-20-2004, 11:46 AM   #5
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propane manometer

Originally Posted by ScrapIrony-2

I haven't tried this, but it seems pretty sound.

thanks for the link. it was exactly what i had in mind and the idea to use the stove as a convenient point to measure is great. i'm assembling the manometer now but it's going slowly because i'm 30 miles from a good hardware store. i'm a little dubious about using 1/2 inch in column lift to "equal" one inch. it seems to me that water on either side of the "u" would balance and that, therefore, one inch of column lift should equal one inch actual. will do some more research on that. i'll report my results.

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