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Old 11-13-2013, 06:44 PM   #1
bobbychuck
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Question Propane Regulators?

I have a 2010 318 SAB that I picked up used last year. Had some trouble with the switchover between propane tanks and had a technician come out but then I had to leave the area so no way to follow up when problem persisted.

Looking at the propane set up I'm confused at what I am looking at. On the starboard (right) side, there is a tank and combination switch/regulator. The starboard tank pigtail is plumbed directly into the switch side and then goes down to the regulator below for distribution. On the port (left) side, the pigtail is plumbed into a regulator and then passes through the body to the starboard side and is plumbed into the opposite side of the switch then to the regulator below. I don't see how this could possibly work, or is there something I'm not understanding? Do others have a second regulator on the non-switching side?
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Old 11-14-2013, 01:01 AM   #2
jesse.m.jm
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Hey Bob,

This sounds correctly set up to me. The way this works is the switch changes which tank is being pulled from. There should be a color indicator that tells you the tank has propane. When the tank runs dry, the indicator should change color. Your appliances should still work at a reduced flow until you flip the switch to start using the other tank. You can then disconnect the empty bottle and fill it while your system is still running off the other tank. Hope this all makes sense. If you have questions, let us know.
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Old 11-14-2013, 04:42 AM   #3
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I recommend that you do a forum search. There are several threads that address this in detail. Also, there is a specific sequence that should be followed when opening the tank valves that is described in the keystone manual. If, after following this procedure, you are still having trouble, you may have a bad 'pig tail'. I replaced ours and solved our problem - about $15 each. Good luck and keep us posted.
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Old 11-14-2013, 05:16 AM   #4
bobbychuck
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OK, found the directions and will give it a go when we stop this evening.
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Old 11-14-2013, 06:08 AM   #5
SAABDOCTOR
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just to add something. When opening your tanks valve do it ever so SLOWLY or you will trip the leak protection device in the hose. but also by your discription you are set up correctly.
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Old 11-14-2013, 07:19 AM   #6
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Why Two Regulators?

Can someone please explain why this setup includes two regulators? Why isn't one sufficient? My setup, which I think is a normal setup, has two tanks, but only one combination switch/regulator.
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Old 11-14-2013, 07:55 AM   #7
hankaye
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gepaine, Howdy;

If you go back to the search function there was an outstanding
post about the Portside (driver's side), regulator. My rememberer,
doesn't allow me to quote it so I'll not drop some 'I Think' on you,
instead I'll just recommend you look for it and get the correct information.

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Old 11-14-2013, 08:24 AM   #8
Festus2
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Post re Marshall 2 stage regulator deleted. Out-dated information.
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Old 11-14-2013, 07:19 PM   #9
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Festus2, Howdy;

I'm thinking that I read/heard somewhere that Marshal went out of business,
Tried your link and found a Casino Advisor ?????

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Old 11-14-2013, 07:33 PM   #10
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hankaye -

Thanks for the correction and update. I should have tried the link before I posted but I got it from a small booklet published by Marshall and I assumed it was still current. Obviously, I didn't do my homework! I'll delete the link and post but am wondering if the OP's 2010 and the other 2011 still have the Marshall 2 stage regulators in them?
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Old 11-15-2013, 07:34 PM   #11
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side by side

my 3912 has both tanks in the same compartment. therefore there is one regulator with a switching valve in it. all small bottles are required to be opd II to comply with regulations. when a tank is in each side of the rv there has to be a regulator at each tank to reduce the pressure from the tank thus reducing the chance of hose rupture and resulting in a explosion.
I am a full timer I fitted my raptor with a supply line from a 500 gallon tank. a high pressure regulator (red) was used at the tank then I installed a low pressure (brown, green,) outside the building prior to the hose that has a quick connect that hooks to a series of valves that turn off the little tanks and regulator and once opened supply my rv with lots of propane without messing with bottles.
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