Re: Sight glasses

[Royce Woodbury]

Gordon Watson wrote:

> .but the connections must equal in cross section
> the milled channel in the main body  ie; if the channel is 1/4 sq. the pipes
> should be 5/16th dia..
>
>                                                      Gordon W.
>

What about the "joint" between the pipes and block.  Typically, the cross
section is reduced at these locations.  Does the full section have to extend
to/from boiler?  And why is this important here, when it would seem to be
violated in other installation configurations?

royce