PEX clamp question

Are any of the Oetiker ear clamp rings suitable for use with PEX tubing for domestic water supply? Will these clamps hold up to a pressurized system?
These certainly seem easier to install than the usual black copper crimp rings.
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If they work and are cheaper, then why doesn't *everybody* use them?? Unless................its been tried and it didn't work, and/or the manufacturer won't stand behind their product unless its been installed to their specs.

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What's so hard about crimping the crimp rings?
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yeah, just use a worm-screw hose clamp on them...
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