... , High protection class, can be worked in moistconditions. IP65 Suitable for 1, IC card meters, heat energy meters, air-warm valve ... and fire work. 3, Water equipment, uto-controlwatersystem, industrial mini-auto equipment 4, Irragation equipment, drinking water equipment, solar water heaters ... , water heaters, industrial eletric warm valve1/2" brass full port for heating system