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Old 10-09-2019, 11:04 AM   #1
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Redundant propane regulator?

So last night it was low 20s here and about midnight we ran out of propane. We have a space heater going as well, so I left it for morning. When I switch bottles, I get a very low propane flow. Not enough to run furnace. I looked at the plumbing, and it on the roadside propane bay I have the input selector, above a regulator. But on the curb side bay, where I am getting low flow from, I see another regulator. So that side goes through this red regulator first, then the main one on the other side. Seems redundant to me. I tried to just remove this regulator, but I need one more fitting to make it work. Im heading downtown for propane in a bit, and some parts. Anyone know why I should get another regulator?

PS propane hose is same rating throughout.
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Old 10-09-2019, 11:06 AM   #2
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PPS I brought the full bottle over to the roadside bay to get the heat and stovetop going. No flow issues.
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Old 10-09-2019, 11:07 AM   #3
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One for the trailer, one for an optional grill quick disconnect?
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Old 10-09-2019, 11:10 AM   #4
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Quote:
Originally Posted by KKonyha View Post
One for the trailer, one for an optional grill quick disconnect?


Both tanks feed the trailer mainline below the tank selector (green indicator). There is a quick connect further downstream.
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Old 10-09-2019, 11:13 AM   #5
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So, are you having issues at normal temps? Read through this just for grins.

https://www.manualslib.com/manual/89...d.html?page=45

vaporization affected by temperature, size of cylinder, surface area of propane, volume of space above liquid level etc. If you google propane vaporization in cold weather, you'll find sufficient reading material to look at this from a different perspective

is this an option you should look at?

https://www.amazon.com › WarmGuard-WG20-Insulated-Cylinder-Warmer
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Old 10-09-2019, 11:15 AM   #6
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The red regulator is set so that the line running across doesn't condense propane in the hose not a pressure issue but liquid causing blockage in said hose. so I was told by propane company employee. I had same issue once turned out to be the whip line from tank to regulator that was bad.
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Old 10-09-2019, 11:18 AM   #7
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Originally Posted by KKonyha View Post
One for the trailer, one for an optional grill quick disconnect?
No, the small red one on the “far” side is to keep the high pressure released from opening the far side bottle from shutting off the newer style safety valve in the far side tank. Without this off-side regulator, the propane necessary to fill the crossover hose to the near side could close that valve.
Some have removed that small regulator and plumbed past it taking care to open the off-side bottle valve very slowly. I replaced mine when it started leaking.
That’s my story and I’m sticking to it!
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Old 10-09-2019, 11:58 AM   #8
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Found this on another site posted by Hankaye


The Driver's side regulator is for reducing the pressure to an acceptable
level for the Black iron pipe. It gets reduced to IIRC 30 psi. They are just
like the regulators on a household tank and function for the same reason,
Should the transport line (black iron pipe), rupture the full pressure won't
cause a massive leak but allow the rapid flow mechanism in the pigtail to
shut off the flow.
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Old 10-09-2019, 07:02 PM   #9
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Originally Posted by Bookumdanno View Post
Found this on another site posted by Hankaye


The Driver's side regulator is for reducing the pressure to an acceptable
level for the Black iron pipe. It gets reduced to IIRC 30 psi. They are just
like the regulators on a household tank and function for the same reason,
Should the transport line (black iron pipe), rupture the full pressure won't
cause a massive leak but allow the rapid flow mechanism in the pigtail to
shut off the flow.
This is talking about the primary regulator. There is no black iron pipe near the off-side regulator nor between that regulator and the primary regulator.
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Old 10-09-2019, 08:39 PM   #10
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The red regulator reduces bottle pressure (150-180 PSI) to about 30-40 PSI for the rubber hose that runs across from one side of the R/V to the other. DOT regulation. The main regulator reduces pressure even further. There is no black iron pipe connected to that supply line. It does help with condensation in the line as well.

On many regulators, if the auto switch over switched (due to a tank running out) and the lever isn't also switched, the regulator puts out a much lower flow. Often times if high demand is needed (furnace and water heater/fridge) it won't supply enough flow until you throw the lever, turning the red indicator, green and taking the regulator out of switch over mode.

Also, there are one way check valves in those brass fittings you see on each side of the regulator where the supply lines attach.

They have been known to stick or go bad. Mine did and I removed them and took the guts out of them. I've since replaced the regulator with a higher flow regulator (for other purposes) but you can also buy those checks separately should you so desire.
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Old 10-13-2019, 02:46 PM   #11
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Well, first attempt throwing parts did not succeed. I replaced the red regulator, and no change. I double checked it was installed correctly, and it is. When you turn propane on, enough gets through to turn the indicator green. But as soon as there is a draw, it goes red as the supply does not keep up. May have to have a look at that check valve assembly next....
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Old 10-18-2019, 04:05 PM   #12
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I replaced the whip and retested. It does feed enough propane to run 3 burners on the stove, without failing. But the indicator does go red while in use. Now I canít say that I have monitored it before to see if this is new or not, but for now we are going to run it and see what happens.
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Old 10-18-2019, 04:45 PM   #13
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Quote:
Originally Posted by -lenny- View Post
I replaced the whip and retested. It does feed enough propane to run 3 burners on the stove, without failing. But the indicator does go red while in use. Now I canít say that I have monitored it before to see if this is new or not, but for now we are going to run it and see what happens.
Try another new whip as you can get bad ones off the shelf. Or, you may have to change the hose going from the red regulator to the main regulator.
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