Hudson Valve

Maintains fluid levels using fluid pressure, as opposed to a lever arm and ball, as the force to close.  Compact, self-contained design greatly enhances reliability.  Body is made of durable glass-filled nylon 6/6; internal parts are made of ABS plastic, silicon and stainless steel.  Meets anti-siphon requirements.  2-year guarantee.  Replacement parts available.  Operating limits 8 - 100 PSI.