"Ed Sirett" wrote in message
...
On Sun, 07 Dec 2008 08:57:03 +0000, Dave Liquorice wrote:

On Sat, 6 Dec 2008 23:40:14 -0000, Ron Lowe wrote:

So a gas bayonet arangement only seals of at the 'fitting' side, not
the 'hose' side when the connection is broken?

Yep.

Why the heck is it not fail-safe in this error condition?

Because the law (trys to) say that only properly trained and registered
professionals are allowed to install this kit and properly trained
professionals never, ever, make mistakes do they?

We all make small mistakes from time to time. Hopefully we spot the bigger
ones.
However this type of mistake arises from a total ignorance about the
purpose and mechanism of the fittings involved.

What I'm saying is that say in driving we all make mistakes, but you'd
only sit in the driving seat backwards if you did not know how to drive at
all.


Yes indeed.

A basic visual inspection of the components would show how the sealing
mechanism operates, even if ( like myself ) you have no prior experience.

It is a serious error which the installer has made.

Nonetheless, human errors do occour, from DIYers, cowboys, and
proffesionals.
And the safest option is to design equipment which mitigates stupidity and
human error as much as is reasonably possible.
It is certainly reasonably possible to engineer bayonet fittings to mitigate
this failure.
Fittings which seal at both ends.
They are in common usage elsewhere, and do not add any dis-advantage except
minimal cost.


--
Ron