(01-07-2023, 05:52 PM)Richard Wrote: [ -> ]I would suggest that you add fittings in the appropriate sizes like this https://www.mcmaster.com/push-to-connect...ial~brass/. I don’t like push to connect, but these jewels will splice a cut or nicked line in about two seconds and get you back in business until you can fix it correctly.
If you also add https://www.mcmaster.com/51915K36 in the same sizes, you can cap an air line in short fashion.
Yes true, Richard! I have a couple plastic ones, just for the emergency you mentioned. The list I made was strictly to help folks build a DOT supply, but they certainly can use a few of the plastic (or brass) push-on unions!
Is a compression fitting a one time use or can you just use a new sleeve?
Brad yes you can reuse a compression fitting, buy a few new ferrules and the brass sleeves (these keep the plastic tubing from cutting when tightening).
(01-08-2023, 06:15 AM)folivier Wrote: [ -> ]Brad yes you can reuse a compression fitting, buy a few new ferrules and the brass sleeves (these keep the plastic tubing from cutting when tightening).
I need further education. So I’ve seen where I can buy replacement sleeves and nuts, but haven’t seen ferrules. I somehow assumed the ferrule was permanently attached to that side of the fitting. Also, to clarify I assumed the ferrule is the part that fits inside the tube?
Speaking of replacement nuts, is there a need for them or are you generally fine using the same nut with a new sleeve?
(01-08-2023, 12:03 PM)360 Wrote: [ -> ] (01-08-2023, 06:15 AM)folivier Wrote: [ -> ]Brad yes you can reuse a compression fitting, buy a few new ferrules and the brass sleeves (these keep the plastic tubing from cutting when tightening).
I need further education. So I’ve seen where I can buy replacement sleeves and nuts, but haven’t seen ferrules. I somehow assumed the ferrule was permanently attached to that side of the fitting. Also, to clarify I assumed the ferrule is the part that fits inside the tube?
Speaking of replacement nuts, is there a need for them or are you generally fine using the same nut with a new sleeve?
Brad,
We need a little bit of terminology clarifcation here:
The fitting consists of the body, the compression
sleeve (or sometimes called a ferrule), the
insert, and the nut.
Yes, the
SLEEVE should be replaced when you break the connection; the rest of the components are reusable.
This is an example of 'Best Practice' versus, do I HAVE TO. Many times, the sleeve "could be" reused, such as in an emergency when you don't have a new one. But, even if I have to "rob" from another spare fitting, I'll always replace the sleeve with a new one. Easy to buy another pack when convenient.
As to the
INSERT, not every fitting has one. As you've found out, they are loose, not a fixed part of the fitting. Those are generally designed for to help the nylon brake tubing maintain it's shape/diameter under the compression of the sleeve. Inserts aren't used for rigid tubing such as copper.
Hope this helps.
(01-07-2023, 05:52 PM)Richard Wrote: [ -> ]I would suggest that you add fittings in the appropriate sizes like this https://www.mcmaster.com/push-to-connect...ial~brass/. I don’t like push to connect, but these jewels will splice a cut or nicked line in about two seconds and get you back in business until you can fix it correctly.
If you also add https://www.mcmaster.com/51915K36 in the same sizes, you can cap an air line in short fashion.
Thanks for the tip on those plugs.