Watts 9D-1/2-M3 Dual Check Valve

The Dual Check Valve Watts 9D-1/2-M3 delivers dependable backflow protection for lab equipment, processing tanks, sterilizers, and dairy equipment. Built with a brass body and a stainless steel disc and poppet, it provides durable, corrosion-resistant performance in demanding sanitary environments. It supports both vertical and horizontal installations with female threaded union x female threaded union ends.

Key specs include a 1/2 inch nominal size, end-to-end distance of 4-15/16 inches, temperature rating from 33 to 250 Deg F, and a 175 PSI pressure rating. The rubber seat, stainless steel springs, and robust construction ensure reliable closure and long service life while the intermediate atmospheric vent helps balance pressure during operation.

• Configuration: Vertical or Horizontal alignment for flexible piping layouts
• Materials: Brass body; stainless steel disc/poppet; stainless steel spring; rubber seat
• Connections: Female threaded unions on both ends for easy installation
• Performance: 175 PSI maximum pressure, 33–250°F temperature range
• Standards: Complies with ASSE 1012 and CSA B64
• Vent: Intermediate atmospheric vent for proper pressure balance

Designed for laboratory equipment, processing tanks, sterilizers, and dairy equipment, this valve ensures reliable backflow protection in critical systems.