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1/2 Inch 9D-M3 Backflow Preventer Brass Dual Check Valve
✅ In stock
📉 Price recently dropped
F
Grade
Analysis Confidence
55%
Price verified Sep 22, 2026 12:01 AM · Prices & availability subject to change
Is This a Good Price on Amazon?
💤 Not a Deal- 💤Verdict: Not a Deal. Price is at or above historical norms. Best to wait for a sale.
- 💰The current price sits right around what this item typically fetches.
- 🏷️The listed retail price is trimmed by 8% at checkout.
- 📉Better-priced windows have occurred before, though not frequently — today's price is reasonably competitive.
- 📈The direction is downward at the moment; if that holds, an even better price may surface — though timing the market is never certain.
How We Scored This Deal
Price Competitiveness
0/28
Recent Value
0/22
Market Standing
8.57/20
Deal Strength
1.5/20
Momentum
10/10
📝 Product Overview
🏪 Sold by
Keegland
📦 Fulfillment
Fulfilled by Amazon
🚚 Shipping
Free Shipping
Product Details
✓Versatility: The dual check valve is designed for smaller supply lines, ideally for laboratory equipment, processing tanks, sterilizers, dairy equipment and similar applications. It is especially recommended for boiler feed lines to prevent the return pressure from being lower than the system pressure during supply. Compatible with all major brands
✓Product Parameter: It is suitable for use on hot or cold water and can be used under continuous pressure.Temperature range: 33°F – 210°F. Maximum Working Pressure:175psi (12.1 bar). Minimum Required Pressure: 25psi (1.7 bar).Inlet & Outlet connection size 1/2 IN, Thread Type NPT
✓Qualitative Materials: Backflow preventer construction consists of brass body, stainless steel working parts, integral filter and durable rubber disc. The inlet and outlet of the inner connector are connected. Main check valve with rubber disc seat combined with matching rubber parts to ensure tight closing
✓Notice: To avoid water damage from valve operation, a drain pipe must be installed, which should terminate about 12 inches above the floor drain. If used on a boiler, do not use an air gap joint on the surface to prevent scalded water or base steam from causing personal injury. Exhaust ports or discharge lines should not be blocked under any circumstances
✓Satisfactory Service: Your satisfaction is always our persistent pursuit, if you have any questions in the use of products, you can always communicate with us, looking forward to serving you
⚙️ Specifications
Material
Brass
Brand
Pontuss
Item dimensions L x W x H
4.4 x 2 x 2.3 inches
Inlet Connection Size
0.5 inches
Inlet Connection Type
National Pipe Tapered
Outlet Connection Type
NPT
Maximum Operating Pressure
175 psi
Number of Ports
2
Outlet Connection Size
0.5 inches
Specification Met
ASME, ASTM, UL
Maximum Pressure
175 psi