The Parmley System was a comprehensive system of reinforced concrete constructions (monolithic, segmental, and unit pipes). The first patent for the system was issued in 1902. This catalog features segmental pipe construction, which Parmley believed was one of the most efficient methods by which sewers and pipe lines could be built.

View showing the junction of brick sewer with Parmley Reinforced Concrete Segmental. Newark, New Jersey.

Source: Walter C. Parmley, The Parmley System of Arch Construction: Catalogue E, Segmental Concrete, Plain and Reinforced (New York, NY: Walter C. Parmley, 1927), p. 37.