Industrial Valves

Dual Check Valve Backflow Preventers

Shop our full range of dual check valve backflow preventers at ValveMan. These valves are designed to stop contaminated water from flowing backward into clean water systems, protecting potable water supplies and maintaining compliance with plumbing codes. Whether you need models with atmospheric vents, corrosion-resistant materials, or compact designs for tight installations, ValveMan carries options to meet your specific requirements. Each valve is built to provide long-lasting reliability, with available configurations that ensure smooth operation and easy maintenance. Browse our inventory, compare specifications, and order online with confidence. Every product we sell is backed by expert service and fast shipping from our trusted warehouse network.

Shop Dual Checks/Dual Checks with Atmospheric Vent

All Dual Checks/Dual Checks with Atmospheric Vent

17 products
SKU: SD-3-MF-LS 3/8
3/8"
3/8" Watts SD-3-MF-LS 3/8, Lead-Free Stainless Steel, Dual Check Valve Backflow Preventer, Atmospheric Vent, Less Strainer, SAE Male Flare Outlet Connection
$925.50$644.99
SKU: SD2-MF 3/8
3/8"
3/8" Watts SD2-MF 3/8, Lead-Free Stainless Steel, Dual Check Valve Backflow Preventer, SAE Male Flare Connection
$449.50$278.99
SKU: SD-2 -MN 1/4
1/4"
1/4" Watts SD-2 -MN 1/4, Lead-Free Stainless Steel, Dual Check Valve Backflow Preventer, Male NPT Connection
$510.00$255.99
SKU: Watts-SD-2
1/4" – 3/8" Available
Watts SD-2 Series, Lead-Free Stainless Steel, Dual Check Valve Backflow Preventer
$449.50Starting at $278.99
Browse Product
SKU: SD-2 -MN 3/8
3/8"
3/8" Watts SD-2 -MN 3/8, Lead-Free Stainless Steel, Dual Check Valve Backflow Preventer, Male NPT Connection
$478.50$257.99
SKU: SD-2-FN 1/4
1/4"
1/4" Watts SD-2-FN 1/4, Lead-Free Stainless Steel, Dual Check Valve Backflow Preventer, Female NPT Connection
$442.50$256.99
SKU: Watts-SD-3
1/4" – 3/8" Available
Watts SD-3 Series, Lead-Free Stainless Steel, Dual Check Valve Backflow Preventer, Atmospheric Vent, Wye Pattern Strainer/Less Strainer
$967.50Starting at $227.99
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SKU: SD-2-FN 3/8
3/8"
3/8" Watts SD-2-FN 3/8, Lead-Free Stainless Steel, Dual Check Valve Backflow Preventer, Female NPT Connection
$478.50$257.99
SKU: SD-2-FF 1/4
1/4"
1/4" Watts SD-2-FF 1/4, Lead-Free Stainless Steel, Dual Check Valve Backflow Preventer, SAE Female Flare Connection
$495.00$256.99
SKU: SD-3-MN 1/4
1/4"
1/4" Watts SD-3-MN 1/4, Lead-Free Stainless Steel, Dual Check Valve Backflow Preventer, Atmospheric Vent, Wye Pattern Strainer, Male NPT Outlet Connection
$967.50$236.99
SKU: SD-2-FF 3/8
3/8"
3/8" Watts SD-2-FF 3/8, Lead-Free Stainless Steel, Dual Check Valve Backflow Preventer, SAE Female Flare Connection
$538.00$256.99
SKU: SD-3-MF 1/4
1/4"
1/4" Watts SD-3-MF 1/4, Lead-Free Stainless Steel, Dual Check Valve Backflow Preventer, Atmospheric Vent, Wye Pattern Strainer, SAE Male Flare Outlet Connection
$967.50$227.99
SKU: SD-3-MN 3/8
3/8"
3/8" Watts SD-3-MN 3/8, Lead-Free Stainless Steel, Dual Check Valve Backflow Preventer, Atmospheric Vent, Wye Pattern Strainer, Male NPT Outlet Connection
$967.50$496.99
SKU: SD-3-MF 3/8
3/8"
3/8" Watts SD-3-MF 3/8, Lead-Free Stainless Steel, Dual Check Valve Backflow Preventer, Atmospheric Vent, Wye Pattern Strainer, SAE Male Flare Outlet Connection
$967.50$496.99
SKU: SD-3-MF-LS 1/4
1/4"
1/4" Watts SD-3-MF-LS 1/4, Lead-Free Stainless Steel, Dual Check Valve Backflow Preventer, Atmospheric Vent, Less Strainer, SAE Male Flare Outlet Connection
$988.00$687.99
SKU: SD-3-FN 1/4
1/4"
1/4" Watts SD-3-FN 1/4, Lead-Free Stainless Steel, Dual Check Valve Backflow Preventer, Atmospheric Vent, Wye Pattern Strainer, Female NPT Outlet Connection
$664.50$236.99
SKU: SD-3-FN 3/8
3/8"
3/8" Watts SD-3-FN 3/8, Lead-Free Stainless Steel, Dual Check Valve Backflow Preventer, Atmospheric Vent, Wye Pattern Strainer, Female NPT Outlet Connection
$925.50$339.99
17+
Products Available
All 50
States Served
Net 30
Terms Available
60 Years
Valve Expertise

Why Buy Dual Checks/Dual Checks with Atmospheric Vent From ValveMan?

Authorized Distributor Since 1965
We are an authorized distributor — not a grey market reseller. Every Dual Checks/Dual Checks with Atmospheric Vent product ships new, with the documentation your purchasing department needs — and whatever warranty the manufacturer offers is passed through to you in full.
Expedited Options + Net 30 Terms
In a hurry? Call 888-825-8800 — depending on the item we may be able to expedite your order, and we'll tell you what's realistic. Qualified buyers can apply for Net 30 terms — ideal for MRO, OEM, and project purchasing.
Technical Support from Valve Experts
Our team has 60+ years of valve product knowledge. Call 888-825-8800 or start a chat — we'll help you select the right Dual Checks/Dual Checks with Atmospheric Vent product for your application, pressure class, and end connection.
Need a volume quote or custom order?
Our B2B team responds within 2 hours on business days. Exton, PA — Trusted Since 1965.
888-825-8800