Higgins, P. J.; Ballanco, J. A.
view article (1.0)
Backflow Protection for Water Supply to Fire Sprinkler Systems? Double Check Valve vs. Reduced Pressure Principle Backflow Preventer.
Building Official and Code Administrator,
Vol. 23,
No. 2,
18-20,
March/April 1989
Higgins, P. J.; Ballanco, J. A.
view article (1.0)
Backflow Protection for Water Supply to Fire Sprinkler Systems.
P. J. Higgins and Associates
Plumbing Engineer,
Vol. 17,
No. 6,
40-42,
July/August 1989