Double Sphere Female Union (Style SEMSDU) Product 24 of 27 | Style SEMSDU Flex-Rubber Expansion Joints are generally used in heating and air conditioning systems, for hot and cold water service, and for mild chemicals and oils. Manufactured using double sphere neoprene tube and cover. End fittings are steel female unions. Working pressures up to 150 psi. Temperatures up to 225°F. Standard sizes range from 3/4" through 3" I.D.
