Wayne,

I wonder if unions are not allowed because they have some greater risk of
failure?????

Smarty



"Wayne Whitney" wrote in message
...
On 2006-11-09, Smarty wrote:

I thought about putting unions all over the place so that each
segment could be independently tightened. I have not seen
professionals use this approach, so I am guessing this is not a
great solution.....

In my building code, unions are only allowed "adjacent to accessible
equipment". That is, if you hard pipe an appliance, you can use a
union for the final connection. Otherwise, unions are out. You can
use a left/right coupling, though.

Cheers, Wayne