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

The Watts 9DS-1/2-M3 Dual Check Valve delivers reliable backflow protection for laboratory equipment, processing tanks, sterilizers, and dairy equipment. This compact brass valve features a stainless steel disc and poppet, a stainless steel spring, and a rubber seat for durable, corrosion-resistant operation. With optional vertical or horizontal mounting, 1/2 inch nominal size, and soldered union end connections, it fits seamlessly into compact process lines. The end-to-end distance is 4-3/8 inches, and the valve is rated for temperatures from 33 to 250°F and up to 175 PSI.

Designed to meet strict safety standards, the valve includes an intermediate atmospheric vent and complies with ASSE 1012 and CSA B64. Its robust construction makes it suitable for laboratory equipment, processing tanks, sterilizers, and dairy lines, ensuring backflow prevention in diverse fluid-handling applications. This dual check valve combines reliable protection with easy installation and long service life in demanding environments.

• Configuration: Vertical or horizontal mounting to fit your layout.
• Connections: 1/2 in nominal size with soldered union x soldered union ends.
• Materials: Brass body; stainless steel disc/poppet and spring; rubber seat.
• Performance: Temperature range 33–250°F; pressure rating 175 PSI.
• Vent & Standards: Intermediate atmospheric vent; ASSE 1012 and CSA B64 compliance.
• Applications: Ideal for laboratory equipment, processing tanks, sterilizers, and dairy equipment.