Scratching the O-ring during installation is probably the biggest
concern - or scratching the pipe badly enough to compromise the O-ring
seal. Cash Acme wants to sell you their nifty little deburring tool.

The really, really neat thing about O-rings is that small scratches just
don't seem to make any difference. If there is an excessive gap under
higher pressures the o-ring might be extruded into the gap.

But, yeah, a cut (not a scratch) in the o-ring may well make it leak.



R