On Sun, 07 Sep 2008 04:05:27 +0000, Larry wrote:

"Jimjamie" wrote in
:

I've seen the vertical floats, the hinged floats, and the twin
cylinder air pressure types.



Good sight glass....right there on the side of the tank next to the beer
cooler.

Don't forget the stopcocks top and bottom in case you break the glass.
Look on any boiler.