gregolma wrote:From Wikipedia:
"Sectional boiler. In a cast iron sectional boiler, sometimes called a "pork chop boiler" the water is contained inside cast iron sections. These sections are assembled on site to create the finished boiler."
I forgot to to mention this in my first post. It's a sectional cast iron boiler. It's interesting in that each section appears to be piped separately.
The sight glass has nothing to do whether the boiler is a fire or water tube boiler. It just lets the operator know that the proper water level is present in the boiler.
Yup, Cast Iron Sectional. Looks like an "O" series. It's set up for steam .You can tell by the placement of the Guage Glass. Also, the water circulates in the boiler through connections made by push nipples, like a radiator. The steam rises above the push nipples, and needs a way to get to the header. that's why the sections are piped seperately between the section and the header.if it was set up for water, the glass would have to be up somewhere above the supply header. Usually see them on the expansion tank. Also, you wouldn't need the pipes to the steam header. You could just circ water through it, like any hot water boiler.