1/2" Watts 9DS-M3 Dual Check with Atmospheric Vent **Solder Ends**

Item Number: 0061952
1 1
$246.00
Limited Stock (2)
Estimated transit time: 2 to 5 Business Days Eligible for Express Shipping

Brand - Watts
  • Body Material: Bronze
  • Weight: 14.1 lb
  • Internal Parts: Stainless Steel
  • Minimum Operating Pressure: 25 PSI
  • Maximum Operating Pressure: 175 PSI
  • Temperature Range: 33°F - 250°F
  • Union Solder End Connections
  • Can be Installed Vertically or Horizontally
  • ASSE 1012 Approved

Description

This 1/2 inch Watts 9DS-M3 Dual Check Valve with Intermediate Atmospheric Vent is designed to prevent the reverse flow of polluted hot or cold water into potable water systems. It features a durable bronze body, stainless steel internal parts, and two tight-sealing rubber check valves, ensuring reliability for non-health hazard applications. Ideal for boiler feed lines, laboratory equipment, and dairy equipment, it maintains a maximum operating pressure of 175 PSI and a temperature range of 33°F to 250°F. The valve includes 1/2 inch union solder end connections for easy installation and maintenance, and is ASSE 1012 and CSA B64.4 approved.

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Connections

  • The union solder end connections are designed for easy installation and removal, providing convenience for maintenance.
  • This valve connects to 1/2 inch pipe using solder fittings.
  • The integral 1/2 inch NPT thread drain connection allows for proper drainage if the downstream check valve fouls.

This valve is ideal for non-health hazard applications where a compact backflow prevention solution with solder connections is required, such as boiler feed lines, laboratory equipment, processing tanks, sterilizers, and dairy equipment.

Warranty Information

Watts (the "Company") warrants each product to be free from defects in material and workmanship under normal usage for a period of one year from the date of original shipment. In the event of such defects within the warranty period, the Company will, at its option, replace or recondition the product without charge. THE WARRANTY SET FORTH HEREIN IS GIVEN EXPRESSLY AND IS THE ONLY WARRANTY GIVEN BY THE COMPANY WITH RESPECT TO THE PRODUCT. THE COMPANY MAKES NO OTHER WARRANTIES, EXPRESS OR IMPLIED. THE COMPANY HEREBY SPECIFICALLY DISCLAIMS ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. The remedy described in the first paragraph of this warranty shall constitute the sole and exclusive remedy for breach of warranty, and the Company shall not be responsible for any incidental, special or consequential damages, including without limitation, lost profits or the cost of repairing or replacing other property which is damaged if this product does not work properly, other costs resulting from labor charges, delays, vandalism, negligence, fouling caused by foreign material, damage from adverse water conditions, chemical, or any other circumstances over which the Company has no control. This warranty shall be invalidated by any abuse, misuse, misapplication, improper installation or improper maintenance or alteration of the product Some States do not allow limitations on how long an implied warranty lasts, and some States do not allow the exclusion or limitation of incidental or consequential damages. Therefore the above limitations may not apply to you. This Limited Warranty gives you specific legal rights, and you may have other rights that vary from State to State. You should consult applicable state laws to determine your rights. SO FAR AS IS CONSISTENT WITH APPLICABLE STATE LAW, ANY IMPLIED WARRANTIES THAT MAY NOT BE DISCLAIMED, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ARE LIMITED IN DURATION TO ONE YEAR FROM THE DATE OF ORIGINAL SHIPMENT.
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Additional Details

The Watts Series 9D Dual Check Valve with Intermediate Atmospheric Vent is designed to prevent the reverse flow of hot or cold polluted water from entering a potable water supply. This valve is suitable for continuous pressure, non-health hazard applications in smaller supply lines.

The Series 9D is ideally suited for applications such as laboratory equipment, processing tanks, sterilizers, dairy equipment, and is specifically recommended for boiler feed lines to prevent backflow when supply pressure falls below system pressure.

Construction & Design

  • Features a forged bronze body with stainless steel internal parts and an integral strainer.
  • Incorporates two durable, tight-sealing rubber check valves. The primary check valve uses rubber-to-rubber seating, while the secondary check valve uses rubber-to-metal seating.
  • In the event of downstream check valve fouling, leakage is vented to atmosphere, safeguarding the potable water system.
  • True line-sized construction allows check modules to open freely, reducing check fouling by allowing dirt and debris to pass.
  • Designed for maximum flow at low pressure drop.
  • Compact design combining economy with performance.
  • Design simplicity for easy maintenance.
  • Can be installed vertically or horizontally.

Connections

  • Furnished with union solder end connections to facilitate easy removal and replacement for maintenance.
  • Features a 1/2 inch drain thread connection.

A WARNING: It is illegal to use this product in any plumbing system providing water for human consumption, such as drinking or dishwashing, in the United States. Before installing, consult your local water authority, building and plumbing codes for standard material product.

Specifications

  • Body Material: Bronze
  • Internal Parts: Stainless Steel
  • Check Valves: Durable Rubber Discs
  • Connections: 1/2 inch Union Solder Ends
  • Drain Connection: 1/2 inch NPT Thread
  • Minimum Operating Pressure: 25 PSI (1.7 bar)
  • Maximum Operating Pressure: 175 PSI (12.1 bar)
  • Temperature Range: 33°F - 250°F (0.5°C - 121°C)
  • Installation Orientation: Vertical or Horizontal

Certificates & Approvals

  • ASSE Standard: 1012
  • CSA Standard: CSA B64.4
  • N.Y.C. BSA: 104-75-SM
  • Certified by CSA

FAQs

What is the primary function of the Watts 9DS-M3 valve?

The primary function of the Watts 9DS-M3 valve is to prevent the reverse flow of hot or cold polluted water from entering a potable water supply system. It is designed for continuous pressure, non-health hazard applications.

What type of connections does this valve have?

This valve features 1/2 inch union solder end connections for both the inlet and outlet, designed to facilitate easy removal and replacement. It also has a 1/2 inch NPT thread drain connection.

Can this valve be installed in any orientation?

Yes, the Watts 9DS-M3 Dual Check Valve with Intermediate Atmospheric Vent can be installed either vertically or horizontally, offering flexibility for various installation requirements.

What are the temperature and pressure limits for this valve?

This valve is rated for a minimum operating pressure of 25 PSI and a maximum operating pressure of 175 PSI. It can operate within a temperature range of 33°F to 250°F (0.5°C to 121°C).

Is this backflow preventer suitable for systems providing drinking water?

No, a warning states that it is illegal to use this product in any plumbing system providing water for human consumption, such as drinking or dishwashing, in the United States. Always consult local water authorities and codes before installation.