HOT WATER FOR DOMESTIC PURPOSES 



AL of the hot water used in the Singer Build- 

 ing for domestic purposes, through 2,500 

 hot -water faucets and 125 slop sinks, is 

 supplied by two Patterson Hot -Water Service 

 Heaters, manufactured by Frank L. Patterson & 

 Co., No. 26 Cortlandt Street, New York. Works at 

 Passaic, N. J. 



These heaters are of the horizontal type, as 

 shown in the accompanying illustration, and are 

 suspended from the ceiling of the compressor room. 

 The shells of these heaters are of boiler plate. The 

 tube heads and exhaust steam chambers are of cast 

 iron, as are also the removable heads. The tubes are 

 of "U" shaped seamless drawn brass, a form that 

 provides for the free contraction and expansion of 

 every individual tube. Each end is secured in the 

 heavy tube head by means of a roller expander. 



In operation, the cold water enters the bottom 

 of the shell near one end and, after being heated to a 

 temperature of 180 F., leaves the top at the other 

 end. There is ample storage capacity, so that a 

 sudden demand is provided for at all times. 



The largest heater is 32 indies in diameter and 

 128 inches long. It has a storage capacity of 280 

 gallons and contains 100 square feet of tubes 1 J inch 

 in diameter. This heater is built for a pressure of 

 150 pounds per square inch and supplies all of the 

 hot water used in the building exclusive of the Tower. 

 The smaller heater is 28 inches in diameter and 108 



I 



inches long. It contains 75 square feet of tubes 1^ 

 inch in diameter and has a storage capacity of 

 160 gallons. This heater is built for a pressure 

 of 500 pounds per square inch and furnishes ;i!l 

 of the hot water used in the halls and rooms of the 

 Tower. 



The pipe connections of both heaters are as 

 follows : 



The inlets for the cold water and the outlets for 

 the hot water are 2 inches and the steam inlets and 

 outlets are 4 inches in diameter. The outlets for the 

 condensed steam are 1^ inch and the blow-off con- 

 nections are also 1^ inch in diameter. 



A particularly valuable feature in connection with 

 the heaters is the removable heads, which are far 

 superior to the usual manhole, because the opening 

 is equal to the full diameter of the shell and gives 

 free access to the interior without disconnecting any 

 pipes. 



Another distinctive feature lies in the Patterson 

 method of supporting the horizontal tubes. A per- 

 forated semi-disk of lead, drilled to match the lower 

 half of the tube head, is placed near the free em I of 

 the tubes. The lower half of each "U" shaped 

 tube passes through it and may move freely, as 

 required by its contraction and expansion, without 

 damage to itself. The lead, being softer, receives 

 the wear that would come on the thin brass tubes if 

 the usual iron frame were used. 



