Watts 1/2inch 9DS-M3 Sweat Backflow Preventer with Atmospheric Vent 0061952

Original price was: $119.87.Current price is: $95.64.

19 in stock

SKU: 40192 Categories: ,


The Watts 1/2-inch 9DS-M3 Sweat Backflow Preventer with Atmospheric Vent is a versatile device used to protect potable water supplies from contamination caused by backflow. Here’s a breakdown of its key features and functions:


  • Prevents backflow: It automatically blocks the flow of contaminated water from entering the clean water supply in case of pressure changes or siphoning conditions.
  • Atmospheric vent: Features an integrated vent that allows air to enter the device, preventing potential vacuum formation and ensuring proper backflow prevention.
  • Sweat connections: Designed for soldering connections to copper piping, offering a secure and leak-proof installation.
  • Continuous pressure applications: Suitable for continuous pressure non-health hazard applications in smaller supply lines.


  • Laboratory equipment: Protects potable water from contamination by chemicals or fluids used in laboratory processes.
  • Processing tanks: Prevents backflow from tanks containing food or beverage products.
  • Sterilizers: Ensures clean water supply for sterilization equipment.
  • Dairy equipment: Safeguards against milk or other dairy products contaminating the clean water supply.
  • Boiler feed lines: Protects boiler systems from contaminated water backflow.

Key Features:

  • Bronze body: Offers durability and corrosion resistance for long-lasting performance.
  • Stainless steel parts: Ensures reliability and prevents rust formation.
  • Integral strainer: Filters out debris and protects internal components.
  • Horizontal or vertical installation: Adapts to various piping configurations.
  • Maximum pressure of 175 psi: Suitable for most residential and commercial applications.


  • Enhanced safety: Provides critical protection against contaminated water backflow, safeguarding your health and property.
  • Reliable performance: Durable construction and proven design ensure dependable operation.
  • Versatility: Suitable for various applications involving non-health hazard fluids.
  • Easy installation: Sweat connections simplify setup for qualified plumbers.
  • Peace of mind: Knowing your water supply is protected from backflow contamination offers valuable assurance.

Things to consider:

  • Local plumbing codes: Ensure the 9DS-M3 complies with local regulations for backflow prevention devices.
  • Application compatibility: Verify its suitability for the specific fluids and pressure conditions of your intended use.
  • Professional installation: Proper installation by a qualified plumber is crucial for optimal performance and safety.

Overall, the Watts 1/2-inch 9DS-M3 Sweat Backflow Preventer with Atmospheric Vent is a reliable and versatile option for protecting your potable water supply from backflow contamination in various applications. Its combination of effective protection, durability, and ease of installation makes it a popular choice for plumbers and homeowners alike.

Additional information

Weight 1.35 lbs


There are no reviews yet.

Only logged in customers who have purchased this product may leave a review.