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What size/config compr fittings should I buy?
I read that Jon and/or Tom said the best compression fittings to use are the Swagelok brand. I discovered a Swagelok store near me and want to buy an inventory of Swagelok DOT compression fittings for our coach so that as I discover leaking push-on fitting I can easily replace them without running to the store.
I suspect there are certain size and configuration fittings that I should buy. Looking for a suggestion of sizes and/or configurations that I should buy to have a good inventory. I’ve replaced less than a half dozen on my coach so I don’t have much experience with the fittings … yet.
Thanks!
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6 Replies
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There may not be a correct answer. However you quickly will learn to visually identify sizes and by looking at a fitting you can easily recognize tube and pipe size. So far the most common on my coaches have been 3/8, 1/4, and 1/8 pipe going to 3/8 and 1/4 tube. But I also have other sizes.
Most common are straight, next is 90 degree, but I also have some 45 degree. The 45 degree Swagelok can and will get, but might take time Those were on Norgrens.
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I was afraid of that … like plumbing a race car. At least that’s a start.
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buy in bulk (fittings ferrules ) get a divided box (20 slots) several rolls of color coded air line. enjoy!
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sorry about smart ass remark! lots of 3/8 od dot air line. need blue for suspension yellow for park brake and black for control(1/4 od) The green you shouldn’t need much ;same with red. Most leaking fittings should fall in the 3/8 dot air line to 1/4 inch npt range. Extra ferrules and collars are nice to have. I have rebuilt my air system as it was destroyed by fire at rear bay bulkhead. I would recomend compression fittings above push as being far superior and resistant to temp change and age. Bob
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I tried to edit: bulk packages of 5 or 10 are most cost effective. when you get changed over to compression you will only need ferrules and collars as rest of fitting is reuseable.
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Until I started using Swagelok I would have said much the same thing Bob said. But Swagelok has a unique ferrule design and I cannot say it is interchangeable with other brand compression fittings or ferrules. I think it is a 2 piece ferrule.
But as replacement fittings for push in you likely need the whole fitting, including ferrule, and I don’t think I got a price break for my purchase. I don’t remember how many I bought, but the last project was to replace all Norgrens and when I did that I also replaced every fitting so there were a lot of fittings involved.
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