On the plastic compressor hoses, if the spring isn't in place, sometimes the hose will crimp near the nipple, and a) not deliver enough pressure and/or 2) develop a leak at the site of the crimp.  Here's what I did to fix that, and prevent it from happening again.

Step 1: Remove Nipple, Repair Hose

 I cut the hose above the crimp, and removed the remaining piece from the nipple.
You may have to use an x-acto knife or a cutting tool to cut through the hose piece; it's fairly tough.

Step 2: Reinsert the Nipple Into the Repaired Hose

 You may have to use a couple of pairs of pliers to force these pieces fully into place.

Step 3: Affixing Spring Into Place

 Keeping the spring in place is what keeps this hose from getting crimped.
One way to make it stay is use a dab of Shoe-Goo.  Thanks to my wife Carolyn for this tip!
For barbed fittings, just inserting them like that is not going to be secure.&nbsp; You <strong>must</strong> use hose clamps.&nbsp; I would not consider that hose safe for more than 10psi.
Willard2.0, <br>Those fittings are engineered just for this type/size tubing. I have personally used them at 120 psi in industrial applications many times with no clamps and they lasted for years, or until someone cut or mangled the tubing.... I have also seen the type you are referring to, some DO have to have clamps or get ready to get slapped with hose - I have been there too!
The only correct way to make a repair that will last is to make the repair as follows:&nbsp; Heat the air line slightly with a heat gun to soften it long enough to slide the fitting in. Let it cool, then slide the spring back down and you have made a repair that will last a long time. If you don't heat the air line, forcing the fitting in will result in a failed repair and&nbsp; wasted time. When you make the repair using the heat gun you will not need clamps and it will last.&nbsp; Do this with all air lines when inserting a new fitting. &nbsp; <br />
&nbsp;Perhaps. &nbsp;Hose clamps might be hard to tighten over the springs. &nbsp;I did have difficulty getting the short piece off; had to cut it off. &nbsp;<br /> But this hose came this way... and didn't fail except to get crimped when the spring was not in place. &nbsp;Thanks for the recommendation though... I'll try that myself and report back how well they tighten over the springs.
I would put the hose clamp before the spring and put the spring just after it.&nbsp; The spring is going to prevent the clamp from working.<br />

About This Instructable




More by gluefish:Fixing a crimped compressor hose 
Add instructable to: