The Bridgeport times and evening farmer., 1919-03-15

Dear Sir
 In response to your request the fol lowing preliminary report on the plumbing in the buildings of the U. s. H. C. at Bridgeport, Conn, Is sub mitted to the committee appointed to test the plumbing.
 This report is officially concurred in by all the members of the com mittee.
 Preliminary report on results ot tests of plumbing in typical buildings of different groups o1 houses con structed by the U. s. Housing Corpor- ation at Bridgeport, Conn, made February 25th, 26th, 2sth. and March 1st, 7th and March 9th, 1919.
 Committee.
 The members of the committee, ap- pointed by the U. S. Housing Corpor- alton to conduct the tests, are:
 Mir. Albert l.. Webster, consulting engineer, New Eork city, chairman.
 Dr. w Paul Gerhard, consulting engineer. New York city, secretary.
 MT. Chas. B. Ball, chief inspector Division of Sanitation, Department of Health, Chicago.
 MT. Nelson s. Thompson, chief me chanicaI engineer, Supervising ArchI- teots Office, Washington. D. c.
 MT. J. W. Mccarthy, plumbing con- tractor, Washington, D. c.
 Purpose of Tests.
 The purpose of the tests was to de- termIne if the plumbing, installed iu the buildings constructed by the U. s, H. c. in Bridgeport, is safe in the opinion of the committee.
 The committee was also asked to express it's opinion of the character of the plumbing, viewed as a war necessity and designed and instaIle under restrictions imposed by the War Industries Board.
 Types of Buildings Tested.
 Four (4) types of buildings were tested. These were stated to repre- sent all the different designs oi plumbing in the several groups of buildings constructed by the U. s. H c, at Bridgeport.
 The types tested were as follows:
 Type G2 Black Rock Group Three story double apartment house. Provid- ing accommodations for two families on each floor; families in all,
 Type J-2 Mill Green Group. Two story semi-detached house. Providing accommodations for two families each family occupying half of each story, separated by a party wall.
 Type HI Mil Green Group. Two story, double house. Providing ac- commodations for two families-(su- perimposed apartrnents) one family on each floor
 Type H-S NH Green Group. Two story double house. Providing ac- commodaHons for two families su- perimposed apartments) one family on each floor.
 Critical Type
 The type of building in which the plumbing will be subjected to the most severe service is type G-2 Black Rock Group,-Three story apartment housing six (6) families, The com mittee therefore applied extensive tests to this type of building. TESTS OF THREE STORY APART
 NrENTS, TYPE G-2,
 BLACK ROCK GROUP
 HOUSING 6 FAMILIES
 Comparison of Ant1-Siphon Traps
 and Vented Traps
 The Committee had two similar buildings of the group equipped with u1l4eIBuE 6yGLeIuS represented the U. & H. c. system, using antI-siphon traps without back ven :-ation pipes, Gas shown on blue prints attached hereto) and the other represented the Bridgeport system of vented traps, known as cps or "1k -S'' traps
 Controlling Limits
 Although there were minor differ ences in the two Installations, the Committee Is convinced that the in- staIlations were comparable, and the Committee is also convinced that the results of the tests of the two build tngs permit fair conclusions to be drawn as to the safety of the D. s. fI- C. system.
 In regard to the three story apart ment type of building (G-2), the Com mittee enphatica1ly limits its conciu- sions to buildings in which the plumb ing design is like that in the U. s. H. c. building tested, the essentials of which are az follows: Buildings three (3) stories high, with cellar beneath; Two CD stacks of A. diameter soil pipes, one for each half of building; Soil stack not over AZ 1t. high, with one group of fixtures on each living floor and one sink in the cellar; Each group of fixtures consisting of
 One W. c. Bath tub. " Iavatory, " Kitchen sink, :" Laundry tray, All fixtures grouped close to soil stack:
 The developed length of any waste or soil branch not exceeding ft- from | soil stack to seal in trap; On rafn-leader, 4'' in diameter, for | the entire roof area, not exceeding 100 square feet; The main drain in cellars, beyond junction of the two soil pipes and | the rain-leader, not less than 5'' ir diameter;
 No house trap or fresh-atr-inlet or | the house drain; Individual discharges from fixtures 1 not exceeding the following rates | W. C.'s 35 gals. per minute @ gal 1 flush)
 i Baths IA gals. per minute. l Combination sink and laundry tray | IS gals. per minutes, Lavatories 5 gals. per minute; | Anti-siphon traps of the two kinds ! ~