Here's a not-so-commonly-known product that I've sort of been using for the last 18 months. It's a push-on style hose barb. When used with the proper hose, you don't need any hose clamps.
The fittings look like this:
That's a banjo fitting that ATP sells. The hose barb end differs from a typical hose barb - note that it's got a "fir tree" profile, so it looks like this from the side:
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Whereas a typical hose barb looks like this from the side:
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The fir-tree style barbs also seem to be deeper than standard hose barbs.
Usually, there's a plastic collar that serves to capture the end of the hose. Here's a pic from McMaster-Carr's catalog (search for "push on hose" to find it at mcmaster.com):
At the bottom left of this picture, you can see the banjo fittings that were included with my XIOS turbo kit. Note the yellow stop collars:
With this type of barb fitting, and the appropriate hose, you simply slide the hose on and you're done. No clamps are needed.
Push-on hose comes is several brands. Examples include Parker Push-Lok and GoodYear Insta-Grip.
I haven't actually tried "going clampless", mainly because the 5/16" ID of my turbo's coolant lines isn't as easy to find as, say, 3/8" push-on hose, and switching my fittings to 3/8" isn't worth the cost, time, or effort.
Nevertheless, this is an intriguing product. Note that there is one potentially significant down-side to using push-on fittings. The hose WILL NOT come off the fitting once it's been assembled. The only way to remove the hose it to cut it free. I learned this the hard way while trial-fitting my turbo kit's coolant lines.
This product may be just the ticket for anybody who's trying to plumb coolant lines in a tight spot where accessing a hose clamp would be difficult or impossible.
