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Waste valve construction disposed in a globe or gate valve housing, through which water or other liquid supply travels. A tubular stem is threaded connected to the housing adjacent its water chamber. Threaded connected within the tubular stem is a shaft having a stop valve at one end which can be seated on a valve seat within the water chamber in the valve housing to provide a positive water shut-off by precluding communication between the inlet to and the outlet from the valve housing. A siphon tube is integrally connected to the wall of the tubular stem for draining the water chamber in the valve housing of waste through the tubular stem when the stop valve is seated on the valve seat in the water chamber. This insures that no foreign waste material can enter into the water supply system
Waste valve DY-121 is one model of waste valve, its specification could be described as below:It use brass material as its body, NPT threaded end and full port with waste. Its pressure is 600WOG.