The unique patented design of the Hudson Valve uses fluid pressure, as
opposed to a lever arm and ball, as the force to close the valve. This
compact, self-contained design greatly enhances the valve's reliability.
The valve body is made of durable glass-filled nylon 6/6. Internal parts
are of ABS plastic, silicone, and stainless steel. When properly
installed, the valve will meet anti-siphon requirements.