Illinois Society of Architects · Chicago · leaf 538
traps made of brittle cast iron or even of brass.The first Dunham Trap, put into service in 1903. and the im-proved trap of today (with the floating valve on thermostatic disc,the rounded valve seat and the standardized roughing-in dimen-sions) differ in no way in either principle or in method of… … Sectional of No. 1 Trap
Architecture · Building · Architects
Internet Archive · University of Illinois Urbana-Champaign · Public Domain Mark 1.0. Free to use for anything.
