AN fittings...aluminum or steel?

[thatdarncat]

A friend of mine turned me on to the Aeroquip socketless hose & fittings years ago, that's pretty much all I use now, along with hard line when I can.

There is a slick tool available for assembling the socketless hose, a bit spendy but worth it if you are going to do a bunch. You can buy it direct from the company or from Summit. Here's a link:

https://koultools.com/product/push-lock-hose-tool/

[Nightmist66]

Typically it helps to heat the hose end up a little bit, but it's a fine line between just enough and too much heat.

Yes, I also heat the end with a small propane torch with a soft flame and use lots of WD-40. I tried all kinds of oils and found the WD-40 worked the best for me.