dual propane set up question
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Fleet Mechanic
Joined: Jun 2002
Posts: 1,986
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From: maryland
dual propane set up question
sorry- might be lame but I just don't know.
2007 cougar 289bhs.
2 propane bottles- 1 on either side up front.
we got it without left tank installed (PO was using it on his grill). he placed the tank back in the cabinet when we bought rv. it was plumbed with 1 regulator and pigtail for the right tank only. the pigtail for the left tank wasn't connected in the right cabinet. I bought a dual auto change regulator and hooked it up and noticed in the left cabinet he had placed another regulator off the black crossover pipe with a pigtail to tank. when connected and the selector on the right tank this single regulator leaked badly out of (factory) pinhole.
is there supposed to be a regulator here or is it just to go from crossover pipe to pigtail to tank? if a regulator is required then is the tank side in or is it the out side?
I was surprised that LP was even coming over there with the selector on the other tank (right) and the left bottle off but it was....
2007 cougar 289bhs.
2 propane bottles- 1 on either side up front.
we got it without left tank installed (PO was using it on his grill). he placed the tank back in the cabinet when we bought rv. it was plumbed with 1 regulator and pigtail for the right tank only. the pigtail for the left tank wasn't connected in the right cabinet. I bought a dual auto change regulator and hooked it up and noticed in the left cabinet he had placed another regulator off the black crossover pipe with a pigtail to tank. when connected and the selector on the right tank this single regulator leaked badly out of (factory) pinhole.
is there supposed to be a regulator here or is it just to go from crossover pipe to pigtail to tank? if a regulator is required then is the tank side in or is it the out side?
I was surprised that LP was even coming over there with the selector on the other tank (right) and the left bottle off but it was....
Super Moderator
Joined: Aug 2008
Posts: 37,379
Likes: 1,862
From: Frederick, MD
A dual regualator is designe to draw gas first based upon the switch (with both bottle open) and then if that bottle is empty, it will draw from the other bottle.
You should only have one regulator with a line going to each bottle.
Get rid of mess he has going on. start over, which it sounds like you have already started.
If there is a pin hole leak, you have to get that gone.
You should only have one regulator with a line going to each bottle.
Get rid of mess he has going on. start over, which it sounds like you have already started.
If there is a pin hole leak, you have to get that gone.
Thread Starter
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Fleet Mechanic
Joined: Jun 2002
Posts: 1,986
Likes: 43
From: maryland
yes I am simplifying the OP's hookup for sure. he had 4 fittings connecting the 1/2" crossover pipe to the regulator in the left compartment...….
the leak was from the regulator body in the left compartment that shouldn't even be connected.
I will plumb like this- right compartment has the dual regulator auto changer and pigtail to tank right tank- connected hose to left tanks cross over pipe-, left compartment will have a pigtail tank connected to the crossover pipe.
thanks
the leak was from the regulator body in the left compartment that shouldn't even be connected.
I will plumb like this- right compartment has the dual regulator auto changer and pigtail to tank right tank- connected hose to left tanks cross over pipe-, left compartment will have a pigtail tank connected to the crossover pipe.
thanks
More Turbo
Joined: Mar 2018
Posts: 737
Likes: 13
My factory setup (bought this trailer new) has dual regulators like you described. Auto change over regulator on the curb side and a second regulator on the driver side. Confused me at first, but it works, so I figured maybe the auto change over was different than the one on my TT and didn't regulate the one coming from the driver's side? I really should look more into exactly how it all works.
Cargo Master
Joined: Feb 2020
Posts: 2,277
Likes: 949
I’m not certain if my cougar has 2 regulators or not...
I usually just open the valve on one bottle. If it goes empty while I’m camping I’ll open the other. My cougar also has a quick connect fitting on the frame to hook up a propane hose for a grill or whatever. Never used it. I don’t have a hose for it either.
I usually just open the valve on one bottle. If it goes empty while I’m camping I’ll open the other. My cougar also has a quick connect fitting on the frame to hook up a propane hose for a grill or whatever. Never used it. I don’t have a hose for it either.
Hotshot
Joined: Jan 2010
Posts: 10,060
Likes: 491
From: Bristol, TN.
This might help explain the need for the red regulator as taken from Trailer Life
"Fifth-wheels typically split the pair of cylinders in two compartments on either side of the trailer. The two-stage regulator is installed in one of the compartments, requiring a flexible high-pressure hose to supply propane from the remote cylinder. If the hose is 60 inches or longer, a step-down single-stage regulator is required with a pressure rating of no more than 30 psi. With a long hose under full pressure, it is possible for the vapor to condense into liquid. This liquid could accumulate in the lowest point of the hose and cause a drop in pressure. Lower pressure from the step-down regulator prevents condensation from occurring."
Steve
"Fifth-wheels typically split the pair of cylinders in two compartments on either side of the trailer. The two-stage regulator is installed in one of the compartments, requiring a flexible high-pressure hose to supply propane from the remote cylinder. If the hose is 60 inches or longer, a step-down single-stage regulator is required with a pressure rating of no more than 30 psi. With a long hose under full pressure, it is possible for the vapor to condense into liquid. This liquid could accumulate in the lowest point of the hose and cause a drop in pressure. Lower pressure from the step-down regulator prevents condensation from occurring."
Steve
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More Turbo
Joined: Mar 2018
Posts: 737
Likes: 13
This might help explain the need for the red regulator as taken from Trailer Life
"Fifth-wheels typically split the pair of cylinders in two compartments on either side of the trailer. The two-stage regulator is installed in one of the compartments, requiring a flexible high-pressure hose to supply propane from the remote cylinder. If the hose is 60 inches or longer, a step-down single-stage regulator is required with a pressure rating of no more than 30 psi. With a long hose under full pressure, it is possible for the vapor to condense into liquid. This liquid could accumulate in the lowest point of the hose and cause a drop in pressure. Lower pressure from the step-down regulator prevents condensation from occurring."
Steve
"Fifth-wheels typically split the pair of cylinders in two compartments on either side of the trailer. The two-stage regulator is installed in one of the compartments, requiring a flexible high-pressure hose to supply propane from the remote cylinder. If the hose is 60 inches or longer, a step-down single-stage regulator is required with a pressure rating of no more than 30 psi. With a long hose under full pressure, it is possible for the vapor to condense into liquid. This liquid could accumulate in the lowest point of the hose and cause a drop in pressure. Lower pressure from the step-down regulator prevents condensation from occurring."
Steve
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Cross-Country
Joined: Oct 2013
Posts: 61
Likes: 8
The regulator on the driver side of my 5th wheel leaks when I open that tank. The 5th wheel is only 3 years old. I assume I have a bad regulator or is it because the passenger side tank is full?
This might help explain the need for the red regulator as taken from Trailer Life
"Fifth-wheels typically split the pair of cylinders in two compartments on either side of the trailer. The two-stage regulator is installed in one of the compartments, requiring a flexible high-pressure hose to supply propane from the remote cylinder. If the hose is 60 inches or longer, a step-down single-stage regulator is required with a pressure rating of no more than 30 psi. With a long hose under full pressure, it is possible for the vapor to condense into liquid. This liquid could accumulate in the lowest point of the hose and cause a drop in pressure. Lower pressure from the step-down regulator prevents condensation from occurring."
Steve
"Fifth-wheels typically split the pair of cylinders in two compartments on either side of the trailer. The two-stage regulator is installed in one of the compartments, requiring a flexible high-pressure hose to supply propane from the remote cylinder. If the hose is 60 inches or longer, a step-down single-stage regulator is required with a pressure rating of no more than 30 psi. With a long hose under full pressure, it is possible for the vapor to condense into liquid. This liquid could accumulate in the lowest point of the hose and cause a drop in pressure. Lower pressure from the step-down regulator prevents condensation from occurring."
Steve
Hotshot
Joined: Jan 2010
Posts: 10,060
Likes: 491
From: Bristol, TN.
Only from one side? Unlikely regulator issue. Hoses are the most common problem. Make up a dish detergent solution and use it on fittings to check for leaks. Having full tank on opposite side is not important.
Steve
Steve
Hotshot
Joined: Oct 2015
Posts: 19,694
Likes: 12,819
From: Wyoming
What Steve said.
I upgraded my regulator a couple years ago and it didn't come with pigtails so I bought the first ones that came up on Amazon. One of those pig tails lasted until this summer. I spent more time selecting the replacement set this time. The first set were from Shinestar and the new ones are from GasPro. The only mistake I made is that the new pig tails are 15" versus the prior 12". That 3" does make a difference.
I upgraded my regulator a couple years ago and it didn't come with pigtails so I bought the first ones that came up on Amazon. One of those pig tails lasted until this summer. I spent more time selecting the replacement set this time. The first set were from Shinestar and the new ones are from GasPro. The only mistake I made is that the new pig tails are 15" versus the prior 12". That 3" does make a difference.
Cross-Country
Joined: Oct 2013
Posts: 61
Likes: 8
I will check that next season when I remove the cover.
Thanks
Thanks
Cross-Country
Joined: Oct 2013
Posts: 61
Likes: 8
Well I decided I wanted to know now so I checked at it is defiantly leaking from the regulator weep hole. So there is a hole in the diafram. I also noticed from the the regulator to the tank connection is a one piece crimp style.
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