Original plumbing trade vintage catalog for AMERICAN HYDROZONE COMPANY. Main office and factory was located at 10 East 40th Street, New York City, NY. Specialists in Water Purification for Municipal and Industrial Requirements. Sparkling pure water without use of chemicals. Used in industrial and process plants, swimming pools, drinking supply. Unbound from a large 1936 architectural catalog, this unique old one page technical brochure would display beautifully matted and framed. A fantastic addition to your retro plumbing collection.