From: "Tony Ingenoso" 

I guess you've never used a FernCo coupling eh?

They're used all the time in buried applications.  FernCo's are good for at
least 20 years.

Check'em out at Home Depot - they're the same synthetic rubber materiel
that automotive boots are made of.

"Robert Comer"  wrote in message
news:42de3506{at}w3.nls.net...
>
> > Silicones last for the life of the vehicle in fact unless physically
torn.
>
> In normal usage, maybe (I've had failures), but bury them for awhile...

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