LP regulator at altitude
Does a LP regulator maintain a constant 11"+/- WC pressure as altitude increases? It would seem that as atmospheric pressure decreases that less force would be exerted on the diaphragm thereby changi...
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The regulator is NOT affected by altitude. The LP regulator takes the VERY HIGH pressure from the LP tank and drops it to 11.5 inches water column. Most RV's have a 2 stage LP regulator. That means it takes the very high tank pressure and drops it and then takes that dropped pressure and then puts out the 11.5 inches pressure. This 2 stage regulator makes for a very good even 11.5 inches unlike a 1 stage LP regulator. What IS affected by Altitude is the LP/Air mixture at the appliance. The LP is usually OK, but lack of air (hi altitude) causes clean burning issues. The output pressure of a LP DOT or ASME will be about 240 psi that the LP regulator drops down to 11.5(or .5 psi) inches water colume. Doug
I will modify my post. The FIRST stage drops the 200 psi LP pressure to about 10 to 15 psi. the 2nd stage drops it to the .5 PSI which is the 11.5 inches Water column that RV appliances run at. The 10 to 15 psi is still 20 times higher than the 11.5 inches W/C the LP appliances run at. Hope this clears it up for the Poster below.
I will modify my post. The FIRST stage drops the 200 psi LP pressure to about 10 to 15 psi. the 2nd stage drops it to the .5 PSI which is the 11.5 inches Water column that RV appliances run at. The 10 to 15 psi is still 20 times higher than the 11.5 inches W/C the LP appliances run at. Hope this clears it up for the Poster below.
