Re: Viewports gobbed on with silicon

[VBra676539@aol.com]

In a message dated 8/12/99 3:36:47 AM, protek@shreve.net writes:

<<  I have had
a pressure buildup due to a slow leak through a pneumatic cylinder's seal.
When I open the hatch it burps expelling air.  Most hatches are not made to
withstand this kind of pressure.  Neither are viewports, BUT at least there
should be a retainer other than just silicone seal to hold a window in.
This is inviting trouble.

Gary Boucher>>

A simple check valve on a hull stop used is the norm for ABS and other 
certifying agencies. You must have some way to relieve internal pressure. 
Waiting for the hatch to burp is an invitation to unseating a viewport.
Vance