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Thread: Air Couplings That Don't BLOW???

  1. #1
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    Air Couplings That Don't BLOW???

    Anybody have a source for decently-priced compressed-air hose couplings (quick-connect) that don't SUCK (or don't BLOW)?

    I made the mistake of buying them from HFT and it seems like they ALL leak whenever you move them. I swear, I hear those things hissing in my nightmares...

    Thanks in advance.

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    Air Couplings That Don't BLOW???

    Iíve been using the Milton high flow couplers.
    762 maybe or 764?

    You can get them at Northern tool.

    The stuff they sell at Harbor freight and Home Depot is junk.

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    Re: Air Couplings That Don't BLOW???

    One thing that really helps with the life of the couplers is to have a short whip hose on any impact type tool. Air hammers and needle scalers are the worst.
    I use the Parker push-lok hose, no clamps or crimp fittings.

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    Re: Air Couplings That Don't BLOW???

    Quote Originally Posted by 12V71 View Post
    I use the Parker push-lok hose, no clamps or crimp fittings.
    Do those yellow plastic rings on the barb fittings do anything?
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    Re: Air Couplings That Don't BLOW???

    Quote Originally Posted by jpump5 View Post
    Do those yellow plastic rings on the barb fittings do anything?
    Not really, I've dragged most of them off the hoses and they are still together. But you do have to have the proper push-lok nipples for the hose.

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    Re: Air Couplings That Don't BLOW???

    Quote Originally Posted by jpump5 View Post
    Do those yellow plastic rings on the barb fittings do anything?
    I'm certain they're not functional. Just cosmetic


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    Re: Air Couplings That Don't BLOW???

    Quote Originally Posted by Lis2323 View Post
    I'm certain they're not functional. Just cosmetic


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    Actually Parker says those yellow rings are to keep the end of the hose from catching on stuff and getting pulled off the nipple. I've never had that happen in 30+ years. Even on the hose reels.

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    Re: Air Couplings That Don't BLOW???

    The old HF 3/8" couplers suck, but the newer "Merlin" automotive-style couplers are bit better (slightly better fit). I don't use anything smaller than the 3/8" size stuff.


    For the least restriction if you have air-hog tools, Milton G-style high flow couplers and fittings. Fittings are cheap on Amazon. Couplers sometimes Ebay has them cheaper, sometimes Amazon. Buying in 5- or 10-packs is cheaper-per-unit than buying singles.

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    Re: Air Couplings That Don't BLOW???

    Air fittings are well worth the "name brand" investment,,
    I have been VERY happy with anything Parker, or Milton.
    AND, it seems like when I have purchased Milton, it is very low cost,, approaching HF,,

    I would only buy Northern if they stocked Milton,, which is possible.

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    Re: Air Couplings That Don't BLOW???

    Quote Originally Posted by SweetMK View Post
    Air fittings are well worth the "name brand" investment,,
    Good advise that applies in almost all scenarios

    I try to stick to one industrial supplier for all my needs.







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    Re: Air Couplings That Don't BLOW???

    Quote Originally Posted by Kelvin View Post
    Anybody have a source for decently-priced compressed-air hose couplings (quick-connect) that don't SUCK (or don't BLOW)?



    Thanks in advance.
    Here you go. I tested it to 145 PSI


    Definitely does not blow






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    Re: Air Couplings That Don't BLOW???

    My shop is for general repairs of my own, so it's stocked with the cheapy Milton couplers... high flows on the half inch lines and just the regular M fittings on the 3/8. If I was going to start over I'd go all high flow. When I was painting we used Devillbis high flows. I have no idea what they'd be worth now (probably quite a bit more than the Miltons) but they were a very high quality coupler/fitting that didn't blow off or leak.
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    Re: Air Couplings That Don't BLOW???

    I am not an industrial user by a long shot but I do use air at pressures between about 80 and 120psi. I use what you would probably call "automotive" couplers - Nitto type - and, at least for me, they don't leak or pop.

    US connectors seem to use NPT whereas most others use BSP. The problem is that these threads are very close - 1/4" NPT is 18 threads per inch and 1/4" BSP is 19 threads per inch. I complained once that the optional air filter for a plasma cutter was NPT whereas the connection on the cutter was BSP. I told them I could only screw the connector in one or two threads by hand - they told me to user a spanner.

    So, I have no problem with Nitto couplers so long as suppliers supply the correct thread. The image is of the Nitto style but not made by Nitto.

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    Re: Air Couplings That Don't BLOW???

    Even Nitto brand. One side has BSPT and the other NPT . NICE They must sell both in both thread styles. These were suggested matches on Amazon. Different thread.

    https://www.amazon.com/Nitto-Kohki-2...CH609SKY8N07RT

    https://www.amazon.com/Nitto-Kohki-2...ZQRWT3H9QQ3ZJK
    Last edited by danielplace; 06-01-2021 at 07:29 AM.

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    Re: Air Couplings That Don't BLOW???

    Yes, Nitto and other couplers are available with both threads - NPT and BSP. NPT is generally available in North America and BSP elsewhere.

    I forget what the specification says but I think the male threads should be tapered but not all are meaning that a thread sealer is required.

    Jack

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    Re: Air Couplings That Don't BLOW???

    Thanks, everyone, for all the great suggestions and helpful intel. I appreciate it.

    I guess if I go with Miltons (or whatever manufacturer), I need to buy both the female coupler and the male fittings that mate up with it.

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    Re: Air Couplings That Don't BLOW???

    the other thing if you use the brass couplers, don't get in the habit of dropping them on the air hose on the ground. deforms the brass coupler and start to leak air.
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  24. #18
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    Re: Air Couplings That Don't BLOW???

    Back to the push lok hose & fittings, I've got one I've used since about 1979 or 80, still going strong on my 1/2" impact that spent most of its life on 150 psi, I think it would take a very healthy man to pull the hose off of the fitting. 12V iss also right, whip hoses are worth their weight in gold when it comes to impact tools , air hammers & the likes.
    Last edited by CAVEMANN; 06-03-2021 at 10:53 PM.
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    Re: Air Couplings That Don't BLOW???

    Quote Originally Posted by Lis2323 View Post
    Here you go. I tested it to 145 PSI

    Definitely does not blow
    By "BLOW," I meant "leak/hiss/blow out air every time you move the coupling, hose or tool"

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    Re: Air Couplings That Don't BLOW???

    Quote Originally Posted by Kelvin View Post
    By "BLOW," I meant "leak/hiss/blow out air every time you move the coupling, hose or tool"
    On a Milton, that just means you got the life out of it and if you install a new one you'll get another long life before it does it again. Some guys can get a decade or two from a coupler. An active mechanic might get a few years. But again, I'm a Milton fan also. And I've worn out my share.
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    Re: Air Couplings That Don't BLOW???

    As far as whip hoses on all of the tools. I've tried that, but I only use rubber hose and usually it will bend and get weak at the tool. I guess I could look for a spring protector......
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  28. #22
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    Re: Air Couplings That Don't BLOW???

    Quote Originally Posted by Stick-man View Post
    As far as whip hoses on all of the tools. I've tried that, but I only use rubber hose and usually it will bend and get weak at the tool. I guess I could look for a spring protector......
    That's the great thing about Push-lok hose... cut off 2" and push it back on.

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    Re: Air Couplings That Don't BLOW???

    Quote Originally Posted by Stick-man View Post
    As far as whip hoses on all of the tools. I've tried that, but I only use rubber hose and usually it will bend and get weak at the tool. I guess I could look for a spring protector......
    ...or a swivel coupling.






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  31. #24
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    Re: Air Couplings That Don't BLOW???

    after 35 years doing bodywork its dropping the coupler and on the floor that deforms them as stated above. amazing how much that helps!
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    Re: Air Couplings That Don't BLOW???

    Quote Originally Posted by Lis2323 View Post
    ...or a swivel coupling.
    Do those leak, Lis? How long do they last before they start leaking? How bad do they hurt you on price? Manufacturer? I might try a few...
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