A new evap check valve

I'm more concerned about the corrosive effects of the additives in gasoline on copper. I think you could have pinhole leaks after a little while. I'm not a chemist, so I'm not sure there would be a concern there, but I've never seen copper used in gasoline fuel applications.

Stainless would indeed be ideal. Or even mild steel with gasoline-resistant paint.
 
pilondav said:
I'm more concerned about the corrosive effects of the additives in gasoline on copper. I think you could have pinhole leaks after a little while. I'm not a chemist, so I'm not sure there would be a concern there, but I've never seen copper used in gasoline fuel applications.

Stainless would indeed be ideal. Or even mild steel with gasoline-resistant paint.
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Yeah i think copper is a temporary solution.
 
LarryW said:
Why would copper be considered temporary?
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B/c apparently they've never seen 100 year old copper roofs and they incorrectly think copper will corrode or something.

Or maybe they are confused b/c copper shouldn't be used for fuel or brake lines. It is prone to breaking after flexing from movement. But there would be no flexing in the situation, and no galvanic reaction. It would be a fine choice, as would brass which is commonly in contact with gasoline / gas-ahol

I flashed my shingled roof with copper 20 years ago as it holds up to the elements much better than aluminum or steel. I suppose that's temporary?
 
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tmsnyder said:
B/c apparently they've never seen 100 year old copper roofs and they incorrectly think copper will corrode or something.

Or maybe they are confused b/c copper shouldn't be used for fuel or brake lines. It is prone to breaking after flexing from movement. But there would be no flexing in the situation, and no galvanic reaction. It would be a fine choice, as would brass which is commonly in contact with gasoline / gas-ahol

I flashed my shingled roof with copper 20 years ago as it holds up to the elements much better than aluminum or steel. I suppose that's temporary?
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Yes, that's temporary. Permanent Is lead coated copper.

Universities use copper, churches use lead coated copper.

The copper will outlast you by a goodly margin...assuming that the roofers that come after aren't hacks and ruin it.

Before I started doing it myself I subbed the work out to a several generation roofing company. Guy comes out to take a look at the roofing for a remodeling project, looks at the the flat seamed lead coated copper and says, "My grandfather did this. I can tell by looking at it." He used the same folding/hemming tool his grandfather had made. No measurements needed and all the panels fit perfectly.

GMC content: a patinated copper GMC would be cool.
 
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Richard RV said:
Yes, that's temporary. Permanent Is lead coated copper.

Universities use copper, churches use lead coated copper.

The copper will outlast you by a goodly margin...assuming that the roofers that come after aren't hacks and ruin it.

Before I started doing it myself I subbed the work out to a several generation roofing company. Guy comes out to take a look at the roofing for a remodeling project, looks at the the flat seamed lead coated copper and says, "My grandfather did this. I can tell by looking at it." He used the same folding/hemming tool his grandfather had made. No measurements needed and all the panels fit perfectly.

GMC content: a patinated copper GMC would be cool.
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In the case of my roof, the shingles are temporary compared to the copper flashing.

I'm also reminded that my house is full of copper plumbing from the 1940s. I suppose 80 years of constant pressure and corrosive water flowing through it will cause it to burst? Not so far. Is that temporary?

All I know is I'd rather have copper or brass in contact with our fuel than pvc or nalgene or almost any other plastic. The original vapor separators were plastic and they don't hold up to the fuel.
 
tmsnyder said:
All I know is I'd rather have copper or brass in contact with our fuel than pvc or nalgene or almost any other plastic. The original vapor separators were plastic and they don't hold up to the fuel.
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The OEM vapor separator lasted for decades. What plastic is it?

Alcohol laced gasoline doesn't play well with copper. Might not be a concern in the short term, but something to think about.



I'm all in favor of a DIY version. I'm partial to stainless steel, but there are other options, and the Corvette separator price is also a bit lower than it was a few years ago.

 
Yes Copper is great for water, maybe even beer.
But this is for gasoline and ethanol, kinda different like Richard said.
Stainless would be better.
The problem with the Corvette separator is they don't last at all, like weeks.

Richard,
I think the mopar separators are just to let gas bubbles out and do not have the check valve
 
Keith V said:
Yes Copper is great for water, maybe even beer.
But this is for gasoline and ethanol, kinda different like Richard said.
Stainless would be better.
The problem with the Corvette separator is they don't last at all, like weeks.
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That's funny b/c the distillery I have is full of copper stills containing alcohol and water. As are all old distilleries. No issues.
 
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