Sweet’s indexed catalogue of building construction for the year 1906 (1906)
New York : Chicago : Architectural Record · leaf 538
events theflooding of cellars while testing the drain-age system of buildings. Fig. 6 shows valveclosed, ready for testing. By unscrewingthe hand hole plug about one inch, thewater in the drainage system flows ofif. Byusing this trap, time and money are saved.After testing, the nipple between the… … Fig. 6. THE PERFECT TESTING TRAPSectional View CENTRAL FOUNDRY COMPANY 468 DRAINAGE AND SEWERAGE SPECIALTIES CENTRAL FOUNDRY COMPANY 87 N. MAY ST, CHICAGO 116 Nassau StreetNEW YORK CITY, N. TELEPHONE, 5450 JOHN BRANCHES BALTIMORE, MD. VINCENNES, IND. PRODUCTS—Manufacturers of F. & W.…
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