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Old 03-19-2022, 02:50 PM   #1
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1/4" air line

Had one that developed a leak today. Started the rig this morning and after switching off, heard some air hissing from near the air dryer. A quick look and there a small hole. I couldn't feel or see any reason to have caused a hole there.

It should be an easy fix so I got a coupler and cut out the bad part.

I'll be replace the entire line later on. Those PTC fittings are kind of cool.
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Old 03-19-2022, 04:24 PM   #2
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Had one that developed a leak today. ...

I couldn't feel or see any reason to have caused a hole there.
I had one fixed under warranty, they told me it is common that when they are doing welding while building the house hot pieces of weld melt the line.
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Old 03-19-2022, 06:54 PM   #3
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I agree, looks like welding splatter got on it. I carry couplers in 1/4, 3/8 and 1/2" just in case.
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Old 03-19-2022, 07:51 PM   #4
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I'm going to end up carrying more replacement parts than I can believe.
Live and learn.
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Old 03-19-2022, 09:34 PM   #5
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Thanks guys. I just added variety packs of 1/4, 3/8, and 1/2 to my Amazon list
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Old 03-19-2022, 11:25 PM   #6
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I'm going to end up carrying more replacement parts than I can believe.
Live and learn.
Haha, you should see all the crap I carry, I have made repairs mostly on others RVs with the, so far.
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Old 03-20-2022, 03:11 PM   #7
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I agree, looks like welding splatter got on it. I carry couplers in 1/4, 3/8 and 1/2" just in case.
Could you show a picture of what you mean when you say "coupler" on the air lines? Especially in regards to repairing an air line. I tend to think of air lines made of "black pipe", and the picture shown looks like tubing of some kind. And I do want to carry the right spares!
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Old 03-20-2022, 03:30 PM   #8
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The chassis is plumbed with DOT approved air lines which range from 1/4Ē to 1/2Ē and use a plastic or brass push to connect fitting. In this pic you can see the black plastic push to connect coupler and a brass push to connect Tee.
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Old 03-20-2022, 07:55 PM   #9
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Could you show a picture of what you mean when you say "coupler" on the air lines? Especially in regards to repairing an air line. I tend to think of air lines made of "black pipe", and the picture shown looks like tubing of some kind. And I do want to carry the right spares!
Our S2RV rigs have several colors for the air lines. Originally, I had thought it had to do with size of the lines but it didn't.
I ordered several sizes of straight unions for spare parts just in case.
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Old 03-20-2022, 08:30 PM   #10
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The colors determine what circuits they are to make them easier to identify and trace.
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Old 03-20-2022, 08:40 PM   #11
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I ordered excessively, figuring i could help others in my travels. 40 pieces of 1/4, 20 of the 3/8, and 20 of the 1/2 was still under $40.Click image for larger version

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ID:	79873Click image for larger version

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Old 03-20-2022, 09:51 PM   #12
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The colors determine what circuits they are to make them easier to identify and trace.
I haven't traced them yet but that's really cool. So many things to do in the last seven months. I'll get there.
Tomorrow starts my big trial for my solar project and I'm really looking forward to that!
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Old 03-21-2022, 12:32 AM   #13
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I ordered excessively, figuring i could help others in my travels. 40 pieces of 1/4, 20 of the 3/8, and 20 of the 1/2 was still under $40.Attachment 79873Attachment 79872
I know that these may only be used in an emergency but any fittings must be DOT approved.

Here is a sample schematic of one of the air systems. Note the table on the right shows the colors and the diamonds along the line drawing has the color code in them.
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Old 03-21-2022, 04:13 AM   #14
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That's helpful. I can return them or even cancel shipping. I guess I don't know exactly what to get then, but will try to research it.
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Old 03-21-2022, 10:23 AM   #15
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That's helpful. I can return them or even cancel shipping. I guess I don't know exactly what to get then, but will try to research it.

Just search "DOT approved air brake fittings" Personally I get either Eaton or Parker fittings and usually just pick them up at a Napa store.
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Old 03-21-2022, 10:58 AM   #16
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Can the air lines be removed from the couplings once inserted? Just added airbags to my TV and plan on keeping a few spares.
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Old 03-21-2022, 10:59 AM   #17
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Can the air lines be removed from the couplings once inserted? Just added airbags to my TV and plan on keeping a few spares.

Yes, if you push the small colored collar towards the fitting, you can pull the line back out.
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