3/4" Watts 9DS-M2 Dual Check with Atmospheric Vent **Soldered Ends**

Item Number: 0061926
1 1
$252.00
Limited Stock (2)
Estimated transit time: 2 to 5 Business Days Eligible for Express Shipping

Brand - Watts
  • Connection Type: 3/4 inch Union Solder
  • Weight: 17.6 lb
  • Body Material: Forged Brass
  • Maximum Operating Pressure: 175 PSI
  • Minimum Operating Pressure: 25 PSI
  • Temperature Range: 33°F - 250°F
  • Stainless steel internal parts
  • Can be installed vertically or horizontally
  • ASSE 1012 and CSA B64 approved

Description

The Watts 9DS-M2 3/4 inch Dual Check Valve with Intermediate Atmospheric Vent is engineered to prevent the backflow of polluted hot or cold water into potable supply lines. Featuring a durable forged brass body and stainless steel internal parts, it includes two rubber check valves and an integral strainer. The 3/4 inch union solder connections allow for easy installation and maintenance. This valve is suitable for continuous pressure, non-health hazard applications in boiler feed lines, laboratory equipment, and other small supply systems, operating between 25-175 PSI and 33-250°F. It is ASSE 1012 and CSA B64 approved. Item number 0061926.

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Connection Information

  • This valve features 3/4 inch union solder end connections, designed to be soldered directly into your plumbing system.
  • The integral union fittings allow for easy removal and replacement of the valve body for maintenance without cutting the soldered pipes.
  • The 1/2 inch NPT thread drain connection requires a drain pipe to be installed, terminating approximately 12 inches (305mm) above a floor drain or through an air gap piped to a floor drain or other suitable place of disposal. This drain line must not be plugged.
  • Compatible with both hot and cold water lines.
  • Designed for smaller supply lines in applications such as laboratory equipment, processing tanks, sterilizers, dairy equipment, and boiler feed lines.

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 9DS-M2 3/4 inch Dual Check Valve with Intermediate Atmospheric Vent prevents the reverse flow of hot or cold polluted water from entering into a potable water supply.

This valve is designed for continuous pressure, non-health hazard applications in smaller supply lines, such as laboratory equipment, processing tanks, sterilizers, dairy equipment, and specifically for boiler feed lines.

Construction & Operation

  • Features a forged brass body with stainless steel internal parts and an integral strainer.
  • Equipped with two durable, tight-sealing rubber check valves; a primary rubber-to-rubber seated check and a secondary rubber-to-metal seated check.
  • In the event of downstream check valve fouling, leakage is vented to atmosphere through the vent port, safeguarding the potable water system.
  • Union end solder connections facilitate removal and replacement for maintenance.
  • Designed for maximum flow at low pressure drop and reduced check fouling due to true line-sized construction.
  • Can be installed vertically or horizontally.

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.

Specifications

  • Body Material: Forged Brass
  • Internal Parts: Stainless Steel
  • Check Valve Material: Rubber
  • Connection Type: 3/4 inch Union Solder
  • Vent/Drain Connection: 1/2 inch NPT Thread
  • Minimum Operating Pressure: 25 PSI
  • Maximum Operating Pressure: 175 PSI
  • Temperature Range: 33°F - 250°F (0.5°C - 121°C)
  • Standards: ASSE 1012, CSA B64
  • Approvals: CSA Certified, N.Y.C. BSA 104-75-SM

Dimensions (Approximate)

  • Length (A): 4 13/16 inches (122 mm)
  • Width (B): 2 9/16 inches (65 mm)
  • Height (E): 2 3/4 inches (70 mm)
  • Union-to-Union Length (E1): 2 1/16 inches (52 mm)
  • Weight: 1 3/4 lbs (0.79 kg)

FAQs

What type of connections does this Watts 9DS-M2 valve have?

The Watts 9DS-M2 valve features 3/4 inch union solder end connections, designed for direct soldering into your plumbing system. The unions allow for easy removal of the valve for maintenance.

What is the primary purpose of the atmospheric vent?

The intermediate atmospheric vent provides a safe way to discharge any leakage from the downstream check valve to atmosphere. This prevents polluted water from entering the potable water supply, safeguarding the system.

Can this backflow preventer be installed in any orientation?

Yes, the Watts 9DS-M2 Dual Check Valve is designed to be installed either vertically or horizontally, offering flexibility for various plumbing configurations.

What are the operating pressure and temperature limits for this valve?

This valve can operate with a minimum pressure of 25 PSI and a maximum operating pressure of 175 PSI. It is suitable for water temperatures ranging from 33°F to 250°F (0.5°C to 121°C).

Is this valve approved for use in potable water systems for human consumption in the United States?

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 building and plumbing codes.