The Watts SD-2 -MN 3/8 is a 3/8" 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 3/8 inch 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, male NPT end connections, and internal rubber components. It is designed for continuous or intermittent pressure applications and dispensing equipment for tea and coffee.
Features
- Maximum working pressure is 200 psi (13.8 bar)
- Includes strainer
- Can be installed vertically or horizontally
- Certified to ANSI/NSF standard 20
- 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
-
Type: Dual Check
-
Size: 3/8"
-
Inlet Size: 3/8"
-
Outlet Size: 3/8"
-
Connection: MNPT
-
Body Material: Stainless
-
Seat / Seal Material: Rubber
-
Max Pressure (psi): 200
-
Application: Domestic Water
-
Backflow Protection: Backpressure
-
Operation: Continuous
-
Pack Quantity: 50
-
Country of Origin: United States
-
Warranty: 1 Year Limited
-
MPN: SD-2 -MN 3/8
-
Certifications: ASSE-1032
-
Lead-Free: No
-
Assembly Type: Dual Check
-
Hazard Protection Level: Low Health Hazard
-
ASSE Standard: ASSE 1032
-
USC FCCCHR Approved: No
-
Field Testable: No
-
Number of Test Cocks: 0
-
Shutoff Valves: None
-
Approved Orientation: Horizontal & Vertical
-
Flood Sensor (SentryPlus Alert): No
-
Strainer Included: Yes
-
Air Gap Fitting Included: No
