if it holds the pressure i don't see why not. they use copper in all sorts if pluming at work with the oil pumps and the air hoses and even in larger sizes in household water plumbing. it just might be a little hard to work with. but if its only 1/4", that might be a great idea. i would say go for it but that's my .o2
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?marrying Judy and water injection?- Frank Walker
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