Source for compression fittings?

[mreisner]

Does anybody have a recommendation for where to buy larger quantities of compression fittings like quarter inch 3/8 3/16 Etc for plastic airline? Seven and eight dollars at the local hardware store is starting to get ridiculous and I wanted to build up a small kit to keep in the shop.

 

[nadogail]

Mc Master Carr or Grainger

 

[Wrench97]

Does anybody have a recommendation for where to buy larger quantities of compression fittings like quarter inch 3/8 3/16 Etc for plastic airline? Seven and eight dollars at the local hardware store is starting to get ridiculous and I wanted to build up a small kit to keep in the shop.

D.O.T nylon reinforced hose fittings or the non-reinforced plastic hose type?

 

[manwithtools]

Does anybody have a recommendation for where to buy larger quantities of compression fittings like quarter inch 3/8 3/16 Etc for plastic airline? Seven and eight dollars at the local hardware store is starting to get ridiculous and I wanted to build up a small kit to keep in the shop.

Why use compression fittings on plastic airline? Unless its a DOT application of course. What a pain in the *** they are. Use quick disconnect air fittings, you can buy assortments on Amazon very reasonably. They have been used in industry for 40 years and they work great. Here's but one example:

12 Pcs 1/4 Push to Connect Fittings 1/4 Inch Tube OD x 1/4 NPT Air Line Fittings Pneumatic Fittings Thread Air Connector Quick Release Pneumatic Kit, 4 Elbow 4 Straight 4 Three-way Push Type

$9.99

 

[mreisner]

Most applications I'm using them on are DOT, ironically the application I really need them for is not DOT it's for an airbag underneath a seat, but even a slight leak messes up the ride height very quickly.

 

[mreisner]

D.O.T nylon reinforced hose fittings or the non-reinforced plastic hose type?

Brass

 

[Wrench97]

Brass

No what type of plastic line are you using them on?

 

[mreisner]

No what type of plastic line are you using them on?

One quarter and 3/8 in. Plastic like on a truck shifter.

 

[e015475]

To keep from getting nickle-and-dimed on my automotive plumbing projects, I've been using Discounthydraulichose.com for about the last ten years

DiscountHydraulicHose.com: Search Results

Most of my projects use various sizes of AN fittings, and the steel JIC fittings save a lot of money. A quick check of their website shows they sell brass air fittings too.

FWIW, the truck in my avatar has an airbag suspension. I tried the push-on connectors and couldn't get the leaks under control, so I took them out and plumbed it with -4 AN and hard line. The combination of the aluminum 5052 hard-line and the steel JIC fittings make a pretty reliable seal. With the push on connectors the truck would only hold air for a couple of days - with the hard-line it'll hold air for a couple of weeks without a recharge from the compressor.

 

[mreisner]

To keep from getting nickle-and-dimed on my automotive plumbing projects, I've been using Discounthydraulichose.com for about the last ten years

DiscountHydraulicHose.com: Search Results

Most of my projects use various sizes of AN fittings, and the steel JIC fittings save a lot of money. A quick check of their website shows they sell brass air fittings too.

FWIW, the truck in my avatar has an airbag suspension. I tried the push-on connectors and couldn't get the leaks under control, so I took them out and plumbed it with -4 AN and hard line. The combination of the aluminum 5052 hard-line and the steel JIC fittings make a pretty reliable seal. With the push on connectors the truck would only hold air for a couple of days - with the hard-line it'll hold air for a couple of weeks without a recharge from the compressor.

That's what I'm running into, it's just a tiny airbag under the seat with the loses just a little bit of air at the ride height changes dramatically and the push to connect ones I just can't get to stop leaking. The ones with the brass ferule work fine however. I have it fixed after a run to Ace Hardware yesterday but it was pretty ridiculous for just a few fittings so I want to get a variety of them to keep in the shop.

 

[Wrench97]

That's what I'm running into, it's just a tiny airbag under the seat with the loses just a little bit of air at the ride height changes dramatically and the push to connect ones I just can't get to stop leaking. The ones with the brass ferule work fine however. I have it fixed after a run to Ace Hardware yesterday but it was pretty ridiculous for just a few fittings so I want to get a variety of them to keep in the shop.

What brand of seat?

We use to buy a kit for the National Seating seats with the hose set and all the valves for cheap, like $25.
Does the air bag have a threaded fitting or a molded in PTC fitting?

You can buy the 1/4" tubing inserts separate pretty cheap > https://www.acehardware.com/departments/plumbing/pipe-fittings/brass-fittings/41288?store=12180
Then use the cheaper standard 1/4" fittings> https://www.homedepot.com/p/LTWFITT...on-Coupling-Fitting-10-Pack-HF62410/313483411

If you have the smaller 5/32" lines like the Eaton Roadrangers use or the even older 1/8" lines the fittinges get stupid expensive.

 

[Rockable]

Check your local ParkerStore. You can negotiate prices when you have some quantity.

 

[unslow1]

I buy them at the local auto parts store for less than half that. They have them up to 3/8 for splicing fuel lines on all the rusted out ones on GM trucks.

785-308D 2pk for $5.49

 

[mreisner]

What brand of seat?

We use to buy a kit for the National Seating seats with the hose set and all the valves for cheap, like $25.
Does the air bag have a threaded fitting or a molded in PTC fitting?

You can buy the 1/4" tubing inserts separate pretty cheap > https://www.acehardware.com/departments/plumbing/pipe-fittings/brass-fittings/41288?store=12180
Then use the cheaper standard 1/4" fittings> https://www.homedepot.com/p/LTWFITT...on-Coupling-Fitting-10-Pack-HF62410/313483411

If you have the smaller 5/32" lines like the Eaton Roadrangers use or the even older 1/8" lines the fittinges get stupid expensive.

Not sure of the brand it's in a Case IH/Steiger tractor.

 

[Wrench97]

That's what I'm running into, it's just a tiny airbag under the seat with the loses just a little bit of air at the ride height changes dramatically and the push to connect ones I just can't get to stop leaking. The ones with the brass ferule work fine however. I have it fixed after a run to Ace Hardware yesterday but it was pretty ridiculous for just a few fittings so I want to get a variety of them to keep in the shop.

Do the fittings have the inserts in them?
In nylon line you need the insert to keep it from collapsing and leaking and for the PTC fittings the hose has to be cut straight with no burs that can cut the oring as it's inserted.

 

[mreisner]

The original line did not have inserts in it, where I repaired it from the mouse damage I did put inserts in. The compression fittings seem to be working fine however the Quick Connect ones have the tiniest of a leak and that's where I ran into a problem once I replace the Quick Connect that I originally used the feral ones are doing a job

 

[Wrench97]

The original line did not have inserts in it, where I repaired it from the mouse damage I did put inserts in. The compression fittings seem to be working fine however the Quick Connect ones have the tiniest of a leak and that's where I ran into a problem once I replace the Quick Connect that I originally used the feral ones are doing a job

I've replaced a lot of older PTC fittings and/or o rings inside the fittings over the years because they leak after 4 or 5 years.
The seat fittings and valves have been an issue since they switched to plastic.