3/8" Watts SD3 Vented Dual Check for Carbonated Beverage Machine

Item Number: 0061657
1 1
$725.61
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When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Watts
  • Dual Check Backflow Preventer with Atmospheric Vent
  • Weight: 8.8 lb
  • Nominal Size: 3/8 inch
  • Body Material: 316 Stainless Steel
  • Max Operating Pressure: 150 PSI
  • Max Operating Temperature: 130°F
  • Inlet Connection: 3/8 inch Female NPT
  • Outlet Connection: 3/8 inch SAE Male Flare
  • Certified to ANSI/NSF Standard 18 and ASSE 1022

Description

The Watts No. SD-3 3/8 inch backflow preventer is a vital safety device for carbonated beverage and coffee machines. It features a dual check with an atmospheric vent and a wye pattern strainer, effectively preventing contaminated carbonated water and CO2 gas from re-entering the potable water supply. Constructed from 316 stainless steel with FDA-compliant rubber components, it ensures corrosion resistance and food safety. Certified to ANSI/NSF Standard 18 and ASSE 1022, this unit has a 3/8 inch female NPT inlet and a 3/8 inch SAE male flare outlet, designed for continuous or intermittent pressure up to 150 PSI.

Help Me Connect

Connections

  • The inlet connection is a 3/8 inch Female NPT, designed to connect to a 3/8 inch Male NPT pipe or fitting on the water supply side.
  • The outlet connection is a 3/8 inch SAE Male Flare, which connects to corresponding 3/8 inch SAE Female Flare fittings commonly found on carbonated beverage equipment.

Installation

This valve can be installed either horizontally or vertically (flow up or flow down). Ensure the strainer and valve are accessible for maintenance. It is critical to connect a vent discharge line from the atmospheric vent outlet to a safe disposal location with adequate ventilation. Do not install inside a wall or in a concealed location. Copper tubing should not be used on the downstream side when connected to carbonated systems.

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 No. SD-3 Backflow Preventer is a 3/8 inch dual check valve with atmospheric port and wye pattern strainer designed to protect the potable water supply from contamination by carbon dioxide gas and carbonated water, particularly in post-mix beverage systems and dispensing equipment for tea and coffee.

This device prevents the reverse flow of potentially contaminated water due to back pressure backflow, ensuring the safety of drinking water.

Key Features

  • Dual check with atmospheric vent for robust backflow prevention.
  • 316 stainless steel body for excellent corrosion resistance.
  • All rubber compounds comply with FDA food additive regulations, ensuring safety for consumable water contact.
  • Atmospheric port provides a visual indication of failure of the second check, enhancing safety and maintenance.
  • Integrated wye pattern strainer for effective water supply filtration.
  • Streamlined body design minimizes pressure loss and cavitation.
  • Endurance tested for more than 500,000 pumping cycles for long-term reliability.

Installation Notice: Copper tubing shall not be used on the downstream side of this backflow preventer when used in carbonated systems due to the risk of copper leaching.

Specifications

  • Valve Type: Dual Check Backflow Preventer with Atmospheric Vent
  • Nominal Size: 3/8 inch
  • Body Material: 316 Stainless Steel
  • Strainer Material: NSF Approved Acetal Plastic
  • Rubber Components: Comply with FDA food additive regulations
  • Inlet Connection: 3/8 inch Female NPT
  • Outlet Connection: 3/8 inch SAE Male Flare
  • Maximum Operating Pressure: 150 PSI (10 bar)
  • Maximum Operating Temperature: 130°F (54°C)
  • Lead Content: Less than 0.25% by weight

Certificates & Approvals

  • ANSI/NSF Standard 18 (Manual Food and Beverage Dispensing Equipment)
  • ASSE 1022 (Dual Check with Atmospheric Vent)
  • Safe Drinking Water Act, Public Law 93-523, National Interim Primary Drinking Water Regulations

Dimensions (approx.)

  • Overall Length (A): 4 1/2 inches (114 mm)
  • Width (B): 1 1/16 inches (27 mm)
  • Height (C): 1 7/8 inches (48 mm)
  • Depth (D): 1 3/4 inches (44 mm)

FAQs

What is the primary purpose of the Watts SD-3 Backflow Preventer?

The primary purpose is to protect the potable water supply from contamination by carbon dioxide gas and carbonated water, preventing these substances from flowing back into the drinking water system, especially in post-mix beverage and coffee machines.

What type of connections does this 3/8 inch Watts SD-3 model have?

This specific model (0061657) features a 3/8 inch Female NPT inlet connection and a 3/8 inch SAE Male Flare outlet connection.

What materials are used in the construction of the Watts SD-3?

The body and adapters are constructed from 316 stainless steel for corrosion resistance, while all internal rubber components comply with FDA food additive regulations. The strainer is made from NSF approved acetal plastic.

What certifications does the Watts SD-3 backflow preventer hold?

It is certified to ANSI/NSF Standard 18 for Manual Food and Beverage Dispensing Equipment and is ASSE 1022 Approved as a Dual Check with Atmospheric Vent. It also complies with the Safe Drinking Water Act.

Can this backflow preventer be installed in any orientation?

Yes, the Watts SD-3 can be installed either horizontally or vertically (flow up or flow down). However, it should not be installed inside a wall or in a concealed location, and the strainer and valve must remain accessible for service.