American standard air gaps and backflow preventers in plumbing systems, approved by American Standards Association (A 40.4) January, 1942 (A 40.6) June, 1943.

American standard air gaps and backflow preventers in plumbing systems, approved by American Standards Association (A 40.4) January, 1942 (A 40.6) June, 1943.

Bibliographic Details
Main Authors: American Publicealth Association, American Society of Mecahnical Engineers, American Society of Mechanical Engineers, American Standards Association
Format: Book
Language:English
Published: New York, N. Y. The American Society of Mechanical Engineers 1943.
Subjects:
Plumbing.
Water-pipes.
Water-pollution.