The Watts SD-2 -MN 1/4 is a 1/4" dual check valve with MNPT connections, approved for low health hazard protection. It features a stainless body and a rubber seat. Rated to 200 psi.
This 1/4" dual check valve backflow prevents the reverse flow of contaminated water from entering into the potable water supply due to backpressure backflow. It consists of a stainless steel body construction with internal rubber components and is designed for continuous or intermittent pressure applications. It has male NPT end connections. It is ideal for dispensing equipment for tea and coffee. Maximum working pressure is 200 psi (13.8 bar).
Features
- Stainless steel for corrosion resistance
- Includes strainer
- Can be installed vertically or horizontally
- Beverage machines
- Includes: Strainer
Common Questions
- What hazard level is this Dual Check approved for?
- It is rated for low health hazard (non-toxic, "pollutant") cross-connections only. Where the substance downstream could be a health hazard, codes require a reduced pressure zone (RPZ) assembly instead. The assembly is listed to ASSE 1032.
- Can this be installed on potable water?
- No. This model is not certified lead-free, so it may not be installed in potable water systems in states enforcing the NSF/ANSI 372 weighted-average lead rule. Use it on non-potable service — fire lines, irrigation or industrial water — or order the LF (lead-free) version of this model for drinking-water use.
- Can this device be field tested?
- No. It has no test cocks and is not a testable assembly, so it cannot be certified by a backflow tester. Where a jurisdiction requires an annually tested device, specify a testable assembly (double check, RPZ, or PVB) instead.
- How does this have to be installed?
- It is approved for either horizontal or vertical installation, with the flow arrow on the body pointing in the direction of flow.
Specifications
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Type: Dual Check
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Size: 1/4"
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Inlet Size: 1/4"
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Outlet Size: 1/4"
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Connection: MNPT
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Body Material: Stainless
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Seat / Seal Material: Rubber
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Max Pressure (psi): 200
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Application: Domestic Water
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Backflow Protection: Backpressure
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Operation: Continuous
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Pack Quantity: 50
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Country of Origin: United States
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Warranty: 1 Year Limited
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MPN: SD-2 -MN 1/4
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Certifications: ASSE-1032
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Lead-Free: No
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Assembly Type: Dual Check
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Hazard Protection Level: Low Health Hazard
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ASSE Standard: ASSE 1032
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USC FCCCHR Approved: No
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Field Testable: No
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Number of Test Cocks: 0
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Shutoff Valves: None
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Approved Orientation: Horizontal & Vertical
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Flood Sensor (SentryPlus Alert): No
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Strainer Included: Yes
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Air Gap Fitting Included: No
