Description For steam and water working pressure up to 150 pounds Brass to iron ball joint seat. Male end of seat made with radius to insure ideal contact if piles are out of line. Recommended for all ordinary plumbing and steam fitting jobs. Scientifically designed to reduce weight without sacrificing strength. For steam and water working pressure up to 150 pounds. Brass to iron ball joint seat. Male end of seat made with radius to insure perfect contact if piles are out of line. Recommended for all ordinary plumbing and steam fitting jobs. Scientifically design ed to reduce weight without sacrificing strength.Galvanized pipe fittings malleable ground joint union size 2 inches For steam and water working pressure up to 150 pounds. Brass to iron ball joint seat. Male end of seat made with radius to insure perfect contact if piles are out of line. Recommended for all ordinary plumbing and steam fitting jobs. Scientifically design ed to reduce weight without sacrificing strength.