This section is from the book "American Plumbing Practice", by The Engineering Record. Also available from Amazon: Plumbing: A working manual of American plumbing practice.
Young Plumber, Charleston, W. Va., writes;
"I am a reader of your valuable paper, and note your request for more reading matter from the craft. I have just put in an old-style range boiler in"a new way to me: Putting cold water in at side A and hot water in at top B, placing stop-cocks at A and C, that water-back and pipes may readily be drained without emptying boiler when it is not cold enough fo freeze a hot boiler in one night's time. D D are stop and waste cocks for controlling water on upper floors. I find that in this manner of boiler fitting the circulation is perfect, no thumping or chinking, and also admits of draining pipes without emptying boiler. And we get hot water in half the time it takes the old way, as the cold water does not pass down through hot to chill it, nor does hot water have to pass through the cold to reach the proper place of storage.

"It there is any objection to this manner of boiler fitting, I would like for some member of the craft to let us hear from him."
[There is some risk of losing the water from the boiler through the cock and connection A into the street mains should the pressure in the latter become light or be drawn off for repairs while they are in their present position, as shown, or into the cellar through the stop waste should the stop be closed. A steam pressure would also drive the water from the boiler by the same connection, and unless there is a hole in the side of the inside pipe, which drops to near the bottom of the boiler, the water "may be driven so low as to allow the water-back to be burned. We would prefer to introduce the cold water to the boiler in the usual position. Otherwise we consider the scheme a very good one. and can see no objection unless it would be the possibility of some one's leaving the cock C closed when fire is in the range.
 
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