Due to the regulator recall, I purchased a Marshall Excelsior regulator and added new Shinestar 15 inch hoses with the gauges. I was changing out tanks the other day and noticed that the tank I removed, the hose at the connector was leaking propane even though I had the switch over to the other tank. I moved the switch back and forth and still, propane was leaking out the disconnected hose. Isn't there a check valve on the hose? Or maybe the regulator is bad. Thoughts?
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John and Lori
2018 F150 XLT SCAB 2.7l
2021 Imagine 22MLETags: None
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Originally posted by JHC View PostDue to the regulator recall, I purchased a Marshall Excelsior regulator and added new Shinestar 15 inch hoses with the gauges. I was changing out tanks the other day and noticed that the tank I removed, the hose at the connector was leaking propane even though I had the switch over to the other tank. I moved the switch back and forth and still, propane was leaking out the disconnected hose. Isn't there a check valve on the hose? Or maybe the regulator is bad. Thoughts?
If you're stating that gas is leaking from the end of the hose where the ACME knob is when it's disconnected from the propane cylinder...it's a bad pigtail. As stated on https://propane.com/common-propane-f...s-and-devices/
Acme fittings are typically found on newer propane containers, and differ from POL valves in size and their use of external threads. Acme fittings can be hand-tightened. They also have a built-in safety mechanism that prevents propane from leaving the tank unless it’s attached to a device.
Forum moderators are not GD employees--we are volunteers and owners presumably just like yourself. Unless specifically mentioned otherwise, we have nothing to gain should you choose to purchase a product or engage a service we discuss on this forum.
2017 Ford F-350 DRW, '19 315RLTSPlus
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Not knowing all of the particulars of the auto valve, the auto valve may require some residual pressure for it to function properly. The leaking pigtail connector is the sealing device which helps to make the auto valve work properly.
I know on my first TT the auto valve would choose the tank with the highest pressure, thus both would be empty at the same time. Not convenient.Joseph
Tow Vehicle: 2024 GMC K3500 Denali Ultimate Diesel
Coach: 303RLS Delivered March 5, 2021
South of Houston Texas
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So if I am understanding you correctly, I shouldn't just have 1 bottle attached to the regulator. I need both bottles attached so there is some back pressure from the empty bottle. I bought another regulator (Fairview) but haven't installed it (ice storm here!!) yet.John and Lori
2018 F150 XLT SCAB 2.7l
2021 Imagine 22MLE
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Originally posted by JHC View PostSo if I am understanding you correctly, I shouldn't just have 1 bottle attached to the regulator. I need both bottles attached so there is some back pressure from the empty bottle. I bought another regulator (Fairview) but haven't installed it (ice storm here!!) yet.
Where is your leak occurring? Did you do a soap test to see where the exact leak is? I have seen posts about 'cheap' pigtails leaking at their swivel fittings, or even at the ACME knob.2019 Imagine 2400BH
2019 F150 XLT Super Crew, EcoBoost, 6.5' box, Max tow package with 3.55 ratio
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It is leaking at the brass fitting that goes into the tank. See the pic above, right where the red arrow is pointing to. The lever on the regulator is pointing to the full tank but getting propane coming out of the pigtail that is not connected to a tank.John and Lori
2018 F150 XLT SCAB 2.7l
2021 Imagine 22MLE
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I would guess either the regulator or the pigtail.
The auto change over regulator is supposed to allow you to remove a tank and refill it , then reinstall. There should be no leakage at the pigtail during this process. If you have a local gas place, welding gas, or bottled gas provider, they may be able to check the regulator but I am not sure about that. Another note is to make sure that the lever is pointed in the right direction and not in the center, if it is in the center it will draw from both tanks at the same time.
BrianBrian & Michelle
2018 Reflection 29RS
2022 Chevy 3500HD
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Since the regulator is new, it maybe worth while contacting Marshall Excelsior and ask them if they think the unit is faulty. If it is, I would hope they would come through and help you out.
Edit:
Just occurred to me JHC , have you tried swapping which pig tail your full tank is attached too? IE, if the left hose was leaking when the tank was connected to the right, move the tank over to the left and see if propane leaks from the right hose. That should help you narrow down if the issue is the regulator or the supply hose.
I also noted this from the MEGR instructions, which seems to align with you experience, although you stated you had flipped the lever, so perhaps something is up with the regulator.
"Black changeover lever must be rotated as far as possibletowards reserve cylinder before disconnecting empty cylinder.Failure to rotate changeover lever and / or disconnection ofhose while indicator is red will result in a propane gas leak..."Last edited by StephenO; 02-03-2022, 10:36 PM.2019 Imagine 2400BH
2019 F150 XLT Super Crew, EcoBoost, 6.5' box, Max tow package with 3.55 ratio
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Something I noticed on all 3 of my campers is when you flip the valve, the indicator does not immediately change to green. You may need to wait a bit for the indicator to change after some propane usage before disconnecting.Joseph
Tow Vehicle: 2024 GMC K3500 Denali Ultimate Diesel
Coach: 303RLS Delivered March 5, 2021
South of Houston Texas
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Update. I purchased 2 Marshall Excelsior MER426-20P pigtails (green acme) to fit on my Fairview GR-9994XF regulator. The Fairview came with brass "back check valves" on both inlets. They are 1/4" female inverted flare. However, the MER426-20P pigtails won't fit in the 1/4" inlets. The package says 1/4" MNPT. When I remove the back check valves, the pigtails screw in just fine. The pigtail package says...."Inside the brass nipple is a flow limiting device designed to sense excess gas flow." Do I need the back check valves or do I need to go and buy pigtails that fit in the 1/4" female inverted flare connectors. The RV parts person said the green pigtails are for hi-flow. And I should be using them. Any thoughts please?John and Lori
2018 F150 XLT SCAB 2.7l
2021 Imagine 22MLE
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Originally posted by JHC View PostUpdate. I purchased 2 Marshall Excelsior MER426-20P pigtails (green acme) to fit on my Fairview GR-9994XF regulator. The Fairview came with brass "back check valves" on both inlets. They are 1/4" female inverted flare. However, the MER426-20P pigtails won't fit in the 1/4" inlets. The package says 1/4" MNPT. When I remove the back check valves, the pigtails screw in just fine. The pigtail package says...."Inside the brass nipple is a flow limiting device designed to sense excess gas flow." Do I need the back check valves or do I need to go and buy pigtails that fit in the 1/4" female inverted flare connectors. The RV parts person said the green pigtails are for hi-flow. And I should be using them. Any thoughts please?
The differences in color are explained on etrailer: https://www.etrailer.com/question-331973.html
I don't know for sure about your specific question regarding the back check valves, so withholding an opinion. The only suggestion I have is to contact Marshall Excelsior customer service (if they have one).
Howard
Forum moderators are not GD employees--we are volunteers and owners presumably just like yourself. Unless specifically mentioned otherwise, we have nothing to gain should you choose to purchase a product or engage a service we discuss on this forum.
2017 Ford F-350 DRW, '19 315RLTSPlus
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Originally posted by JHC View PostUpdate. I purchased 2 Marshall Excelsior MER426-20P pigtails (green acme) to fit on my Fairview GR-9994XF regulator. The Fairview came with brass "back check valves" on both inlets. They are 1/4" female inverted flare. However, the MER426-20P pigtails won't fit in the 1/4" inlets. The package says 1/4" MNPT. When I remove the back check valves, the pigtails screw in just fine. The pigtail package says...."Inside the brass nipple is a flow limiting device designed to sense excess gas flow." Do I need the back check valves or do I need to go and buy pigtails that fit in the 1/4" female inverted flare connectors. The RV parts person said the green pigtails are for hi-flow. And I should be using them. Any thoughts please?
Looking at the parts information for the pigtails you purchased, it does list
Type 1 Back Check Connector with thermal protection.
I am no means an expert, and please verify this, but to me that means the hose has the built-in check valves, meaning the check valve in the FIF fitting on the new regulator are not required. Again, please verify that information like Howard suggests.
When I installed our MEGR regulator, it also had FIF fittings installed, but they were just that, a FIF to MPT adapter. There was no internal components in the fitting, just a 'straight pipe', which was the same as the Winntec regulator taken out. Meaning the hoses needed a check valve instead.
2019 Imagine 2400BH
2019 F150 XLT Super Crew, EcoBoost, 6.5' box, Max tow package with 3.55 ratio
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