Air coupler tips

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Forum topic by BentheViking posted 06-09-2013 03:40 AM 4872 views 0 times favorited 15 replies Add to Favorites Watch
View BentheViking's profile


1782 posts in 2559 days

06-09-2013 03:40 AM

Topic tags/keywords: nail gun air compressor air coupler air hose quick connect pneumatic

I am looking into replacing some of the quick connect connectors on my air system. All of the couplers that I currently have are cheapos and every time I put a gun or whatever I am using down, unless I purposefully set it down in such a way so that it doesn’t put any bend on the coupler connection and cause an air leak. Any one have any suggestions as to a good brand or place to get something thats quality and not going to leak regardless of how I leave my guns?

Thanks in advance

-- It's made of wood. Real sturdy.--Chubbs Peterson

15 replies so far

View ajosephg's profile


1880 posts in 3556 days

#1 posted 06-09-2013 03:52 AM

I’ve never had that problem and I’ve bought them at Lowes, NAPA, and Tractor Supply. Can’t remember the names of all the different manufacturers, but I know that Campbell Hausfield is one of them. I do use rubber hose instead of plastic.

-- Joe

View Loren's profile


10377 posts in 3643 days

#2 posted 06-09-2013 04:17 AM

Well, diagnose the problem. I’ve never found
the cheap ones to be a problem.

I use plumbers tape on the part screwed into the

Look at the male part of the quick connect. If there
are any nicks around the edge, those can cause
leaks – the end can be filed and polished with
sandpaper and then it will seal.

Finally, where the hose connects to the female
coupler is a problem area, especially with coiled
plastic hoses. The culprit is often the part that’s
barbed on one end and threaded on the other –
you screw the female coupe to it (with tape),
but the barbs don’t always make a good seal
with the plastic hoses. I have cut the hose off
and refit the barbed part. I use vaseline to
get it in. and maybe the gunk improved the
durability of the seal too.

View MrUnix's profile


6703 posts in 2194 days

#3 posted 06-09-2013 06:38 AM

I have quick connects on all my air tools; air chucks, blow tips, die grinders, rotary/jitterbug sanders, air ratchets, spray guns and air brushes, needle scalers, sand blaster etc.. the ONLY one I had a leak problem on was an impact wrench that had an older coupling on it when I purchased it.. there was a visible, slightly smaller diameter ring around it just where the locking balls in the female coupling made contact; that was enough to allow the connector to wobble back and forth ever so slightly, and just enough to cause it to leak when in a certain position. The fix was to replace the coupling with a new one; problem solved for under a $1.

Like Joe and Loren, I have purchased the couplings from all over the place.. Tractor Supply, HD, Lowes and even Horror Freight.. all different brands and none have ever had a problem.


-- Brad in FL - In Dog I trust... everything else is questionable

View BentheViking's profile


1782 posts in 2559 days

#4 posted 06-09-2013 12:40 PM

I have a rubber, pvc, and polyurethane hoses and have used 4 different nail guns on them and regardless of what I’ve used I still have the same issue so I can only assume that it is a wobble on the internal of the female coupler since if I move the gun around a little bit I can usually get them to sit just right so that they don’t hiss. As soon as I pick the gun up the hiss starts again and if I don’t put it down just so it hisses. I can admit that most of my couplers are HF type (and some probably cheaper) cheapies. I always have just chocked it up to getting what you pay for.

As I was researching this on my own I found that it seems like there are different types of connectors (usually designated with numbers) even though they all look the same. Could it be that I am using parts that aren’t made to work together?

-- It's made of wood. Real sturdy.--Chubbs Peterson

View RodNGun's profile


118 posts in 2298 days

#5 posted 06-09-2013 01:46 PM

I got these connections from a Snap On guy and they are fantastic… they just, well, snap on. You push the red button and they snap off. You still need to use plumbers tape when fitting all your connections together but I would highly recommend these.

View Gene Howe's profile

Gene Howe

10479 posts in 3423 days

#6 posted 06-09-2013 02:08 PM

Sounds as if your coupler isn’t machined as well as it could be.
+1 on the Snap On couplers.

-- Gene 'The true soldier fights not because he hates what is in front of him, but because he loves what is behind him.' G. K. Chesterton

View BentheViking's profile


1782 posts in 2559 days

#7 posted 06-10-2013 01:20 AM

Hmmmph…those snap on couplers look real nice, but I am struggling to find them anywhere online. Freeman has a similar looking fitting on woodcrafts website, but Freeman products aren’t the highest quality and I’m trying to make sure I get something quality so that I don’t have issues in the future.

-- It's made of wood. Real sturdy.--Chubbs Peterson

View pintodeluxe's profile


5654 posts in 2808 days

#8 posted 06-10-2013 03:52 AM

I just use the quick connect couplers from Lowes (available everywhere). The pivoting connections that come with newer nail guns are the only ones I have had leak.
1+ Teflon pipe tape to prevent leaks

-- Willie, Washington "If You Choose Not To Decide, You Still Have Made a Choice" - Rush

View BentheViking's profile


1782 posts in 2559 days

#9 posted 06-10-2013 04:07 AM

I ended up giving this set a shot from amazon.

I know everyone keeps suggesting teflon tape which I always use on the threads (and don’t have issues). Am I missing a way to utilize teflon tape on the male end so that it better seats in the female end of the quick connector? it seems like i’d make a mess and it wouldn’t seat properly.

-- It's made of wood. Real sturdy.--Chubbs Peterson

View MarkSr's profile


215 posts in 2045 days

#10 posted 06-10-2013 04:27 AM

Don’t feel bad Ben, at least you sound like you know what your doing. In my case, I purchased a Used Porter Cable hose and brad nailer and have had no problems with either one. However, my brother-in-law, (or outlaw I should say) gave me two 25 ft. hoses with couplers on both ends and both sets of hoses leak.

So my question is the same as Ben’s except I have to add, “when I cut off the old coupler how does the new ones get put on the rubber hose”? Is it type of compression fitting for both male and female? These hoses will be coming from the compressor, so I put the male of the hose to the female of the compressor and just the opposite to the gun”.

I got the way things are suppose to go, but HOW do I get the new couplers on to the hoses??

Or have I totally lost everyone.


-- Mark, ”...NEWBEE: On the road to learning a lot; but; a lot more to learn…” ("My Granddad used to tell me, if you didn't learn something new today, it just wasn't worth getting out of bed")

View Loren's profile


10377 posts in 3643 days

#11 posted 06-10-2013 04:33 AM

I use vaseline to get the barb in the hose.

View MrUnix's profile


6703 posts in 2194 days

#12 posted 06-10-2013 06:08 AM

AFAIK, the most common connector type, and what you will find at Tractor Supply, Horror Freight, the Borg, etc.. is type “M” (also known as an ‘industrial’ connector). That Amazon set is a type “D” which might cause problems down the road if you need to add tools to your collection and have trouble finding a ready source of those type. I don’t think they will work well with the more standard “M” connectors, but I have never actually tried it out. The “automotive” type (Type G?) is also fairly common, but not nearly as much as the type “M”. Both come in 1/4” and 3/8” flavors.

Here is a link to Milton’s full-size drawings and info on the various types of connectors:


-- Brad in FL - In Dog I trust... everything else is questionable

View Joseph Jossem's profile

Joseph Jossem

492 posts in 2263 days

#13 posted 06-10-2013 06:14 AM

I have had this problem before now I run 4 compressors do not use the pretty colored ones they are weak aluminum or something.I go to my local auto shop and get the ones used on neumatic air tools in mechanic shops last for ever plug em in 30x a day no problem nice and tight and you can abuse them cost more but worth it.

View TDSpade's profile


97 posts in 2411 days

#14 posted 06-10-2013 07:43 AM

No need to use vaseline. Just dip the barbed end in alcohol. It will slip right into the rubber hose. The alcohol quickly evaporates. No fuss no mess. I learned that trick in my misspent youth replacing the rubber tubing on my wrist rocket slingshot.

I been having the same problem with my harbor freight air couplers. Very annoying let us how those you ordered work out for you.

-- For every expert, there is an equal and opposite expert.

View BentheViking's profile


1782 posts in 2559 days

#15 posted 06-10-2013 11:33 AM

Thanks for that link Brad. Unless all the amazon reviews are wrong I think this set will work for me. I am a 1 man shop that sees use up to two days a week and I don’t always run my pneumatic equipment. I only own 4 nail guns (one of which is for hardwood flooring) and I just bought a spray gun so I can handle the cost and effort of switching them and my 3 air hoses over to the new tips. We’ll see how it goes but for now I’m hopeful that it solves my problem and takes care of that annoying hiss

-- It's made of wood. Real sturdy.--Chubbs Peterson

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