Watts 0780005 Valve

The Watts 0780005, also known as the 500TO-1/2 heavy duty float valve, is a high-performance solution for liquid level control in demanding environments. Engineered with a rugged bronze body and high-tensile manganese bronze arms, this 1/2-inch valve is built to survive continuous duty in cooling towers, industrial refrigeration units, and large-scale irrigation systems. It features a unique threaded outlet (MNPT) with a machined flange, making it the preferred choice for tank wall-mounted float valve installations where a secure, leak-proof mechanical connection is non-negotiable.

Designed for industrial-grade throughput, the Watts 500TO delivers a high-flow capacity of up to 31 GPM at 100 PSI, far exceeding standard consumer-grade valves. The inclusion of serrated arms allows for precise, micro-adjustable water level calibration, while the no-jam single lever action ensures reliable shut-off even in systems with high inlet pressures up to 165 PSI. This mechanical float valve is fully field-serviceable with replaceable Buna-N seals, reducing downtime for high-volume commercial HVAC maintenance and agricultural water management.

• Enhanced Flow Dynamics: Supports 20 GPM at 50 PSI up to 31 GPM at 100 PSI for rapid tank recovery.
• Rugged Construction: Bronze body and brass plunger withstand temperatures up to 180°F and high-pressure cycles.
• Precision Leveling: Serrated arm design enables granular control over water levels without complex tools.
• Versatile Mounting: 1/2-inch MNPT threaded outlet with machined flange ensures stable mounting against tank walls.
• Industrial Compatibility: Identical to the 500TO-1/2 for easy drop-in replacement in legacy systems.

• Is this compatible with standard 1/2" NPT pipe? Yes, it features a 1/2" MNPT threaded outlet for direct connection to standard plumbing runs or locknut securing.
• Can this be used in hot water applications? Absolutely. It is rated for constant fluid temperatures up to 180°F (82°C).
• What float should be used with the 500TO? It is typically paired with 4" to 5" copper or plastic floats depending on the specific buoyancy requirements of your fluid medium.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.