Propane regulator psi?

• Nov 22, 2013

• #1

-lenny-

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Propane regulator on sled trailer crapped out, was spewing propane non stop. I picked up a new one, but it is adjustable psi and the old one was not. What pressure should I set it to? Just runs the furnace, can't remember if it is 30 or 40k BTU.

Thanks in advance.

 

• Nov 22, 2013

• #2

Lightningmike

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I remember seeing somewhere about 10 -11"wc. I think just under 1 psi. Don't quote me, just what I heard.

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• Nov 22, 2013

• #3

JMCX

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There should be a label inside the furnace cover with supply pressure range or maximum. Most probably less than one psi (28" wc).

 

• Nov 23, 2013

• #4

347strokin

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Or the old regulator may be stamped if you still have it.

 

• Nov 23, 2013

• #5

S

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Propane = 10-11 inches of water column
Natural Gas = 3.5 inches of water column

You need a manometer to set it properly or you can overfire your heater which is not good (a gasfitter/plumber/sheet metal mechanic should have one). inches of water column is a lot less then psi.

 

• Nov 23, 2013

• #6

rabbit

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If the regulator is silver in colour and for propane its already preset to 10-11" WC. If its red coloured its in PSI and can't be adjusted low enough to run a furnace.

 

• Nov 23, 2013

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-lenny-

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Now I know the source of my problems lol! Red regulator... Thanks for the info!

 

• Nov 23, 2013

• #8

TABSTER

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LP is 11" w.c. but also check your temperature differance and consult your heater manual for TD and adjust accordingly.

 

• Nov 24, 2013

• #9

rotormech

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As a rv tech the reg should be at 11 inches on a manometer when in operation,so with the furnace not running should be at 12.5,don't forget to do a leak check,pressure up system,turn of propane,let pressure off till meter is at 10 inches,should stay there for 3 minutes with no movement.