1 7

1/2" 9D-M3 Backflow Preventer, Brass Dual Check Valve with Intermediate Atmospheric Vent, 1/2 Inch back flow preventer valve Female Union, Vertical or Horizontal Install - size: 1/2 Inch

1/2" 9D-M3 Backflow Preventer, Brass Dual Check Valve with Intermediate Atmospheric Vent, 1/2 Inch back flow preventer valve Female Union, Vertical or Horizontal Install - size: 1/2 Inch

$36.50 USD
$36.50 USD
Sale Sold out
Taxes included. Shipping calculated at checkout.

About this item

  • 【Heavy duty brass material】The backflow preventer consists of a brass body, stainless steel working parts, a one-piece strainer and a durable rubber disk. Superior corrosion resistance provides decades of reliable service with a life expectancy 3 times longer compared to standard valves. Precision-machined double check mechanism maintains leak-free performance during frequent pressure surges
  • 【Powerful and consistent performance】AQOVOR's Dual Check Valve is suitable for hot or cold water and can be used under continuous pressure. Stable operation over a temperature range of 33°F (freeze-proof) to 210°F (boil water resistant). Maximum operating pressure is 175psi (12.1 bar) - tested to 5000+ pressure cycles. Minimum required pressure is 25 psi (1.7 bar). Fail-safe reliability in extreme temperature and pressure environments
  • 【Standard sizes for a wide range of applications】Brass back flow preventer valves with universal 1/2-inch female threaded connections fit seamlessly into standard U.S. piping, eliminating the need for piping modifications. Designed for smaller supply lines, ideal for laboratory equipment, process tanks, sterilizers and dairy applications. Especially recommended for boiler feed lines to ensure return pressure remains above system pressure during operation.
  • 【Critical safety note】To avoid water damage during operation of the check valve, a drain must be installed approximately 12 inches above the floor drain. If used on a boiler, do not use air gap fittings on surfaces to prevent personal injury from scalding. Under no circumstances should the exhaust port or discharge line be blocked
  • 【User-friendly design】Cast-in ‘INLET’ & ‘VENT’ labels eliminate installation guesswork - no peeling stickers or faint markings. Raised brass lettering is legible for life, ensuring proper orientation and preventing reverse connections from causing leaks. Can be installed vertically or horizontally, providing flexibility in your installation

Overview

  • Material: Brass
  • Brand: AQOVOR
  • Item dimensions L x W x H: 4.9 x 2 x 2.5 inches
  • Exterior Finish: Brass
  • Inlet Connection Size: 0.5 inches
  • Outlet Connection Type: NPT
  • Maximum Operating Pressure: 175 psi
  • Number of Ports: 2
  • Outlet Connection Size: 0.5 inches
  • Specification Met: ASTM, ASME

Low stock: 10 left

View full details

Reviews

  • ⭐⭐⭐⭐⭐

    Michael Turner — Columbus, Ohio

    MROVanta made it easier to find several maintenance supplies in one place. The product information helped me compare the available options, and everything I ordered was useful for routine work around our facility.

  • ⭐⭐⭐⭐⭐

    Rachel Morgan — Phoenix, Arizona

    I was looking for practical supplies for our workshop and found the selection easy to browse. The categories were well organized, and I could quickly locate tools, fasteners, and other items needed for regular maintenance.

  • ⭐⭐⭐⭐⭐

    David Collins — Charlotte, North Carolina

    The products I selected were suitable for the maintenance tasks we had planned. I appreciated being able to review the specifications before ordering, especially when comparing sizes and compatibility for different applications.

  • ⭐⭐⭐⭐⭐

    Amanda Brooks — Denver, Colorado

    I ordered a mix of facility and equipment supplies for our work area. The shopping process was straightforward, and the selection covered several everyday maintenance needs without requiring visits to multiple stores.

New Arrivals

View all

Featured Collections

1 4

FAQ

How can I confirm that a product is suitable for my application?


Review the product description, dimensions, materials, ratings, connection types, and compatibility information before ordering. Industrial requirements vary, so consult the equipment manufacturer or a qualified professional if you are uncertain.

Do you provide installation or technical advice?


We can help clarify information shown on a product page, but we do not provide engineering, installation, or workplace-safety advice. Products should be selected, installed, and operated by appropriately qualified personnel where required.

Can I change or cancel my order after placing it?


Contact us as soon as possible at ruleindgalein@gmail.com. We will try to accommodate your request, but changes or cancellations cannot be guaranteed once an order has entered processing or shipment.

When will my order be shipped?


Processing and delivery estimates may vary depending on the product, destination, inventory availability, and carrier. Please review the shipping information provided at checkout and our Shipping & Delivery Policy for additional details.

How can I track my order?


When tracking becomes available, it will be sent to the email address used for your order. Tracking activity may take some time to appear after the carrier receives the shipment.

Why did my order arrive in more than one package?


Items from the same order may be fulfilled or shipped separately. As a result, packages can arrive at different times and may have separate tracking numbers. You will not be charged additional shipping solely because an order is divided into multiple shipments.

What should I do if an item arrives damaged, defective, or incorrect?


Contact us promptly at ruleindgalein@gmail.com with your order number, a description of the issue, and clear photographs of the item, packaging, shipping label, and any visible damage. Keep all packaging until we provide further instructions.

Can I return an item if it is not suitable?


Eligible items may be returned in accordance with our Return & Refund Policy. Return conditions, exclusions, time limits, and any applicable costs depend on the item and circumstances. Please contact us before sending anything back.

Do you offer bulk quantities or business purchasing?


Availability of larger quantities varies by product. Email us with the product link, desired quantity, required specifications, and delivery location, and we will let you know whether suitable options are available.

How can I contact MROVanta?


Email us at ruleindgalein@gmail.com or call +1 (936) 260-5549. Include your order number when contacting us about an existing purchase so we can assist you more efficiently.

Blog posts

View all
  • How to Stop Rust Before It Starts: A Practical Guide to Protecting Exposed Metal Pipes in Humid Facilities

    How to Stop Rust Before It Starts: A Practical ...

    Learn how to prevent rust on exposed metal pipes in humid industrial facilities. Discover practical corrosion-control methods, surface preparation techniques, coating considerations, and preventive maintenance practices.

    How to Stop Rust Before It Starts: A Practical ...

    Learn how to prevent rust on exposed metal pipes in humid industrial facilities. Discover practical corrosion-control methods, surface preparation techniques, coating considerations, and preventive maintenance practices.

  • How to Stop Rust Before It Starts: A Practical Corrosion Strategy for Humid Industrial Facilities

    How to Stop Rust Before It Starts: A Practical ...

    Learn how to prevent rust on exposed metal pipes in humid industrial facilities with practical corrosion-control strategies. Discover how moisture, condensation, coatings, pipe supports, and routine MRO inspections work together...

    How to Stop Rust Before It Starts: A Practical ...

    Learn how to prevent rust on exposed metal pipes in humid industrial facilities with practical corrosion-control strategies. Discover how moisture, condensation, coatings, pipe supports, and routine MRO inspections work together...

  • Why Exposed Metal Pipes Rust Faster in Industrial Facilities—and How to Stop It

    Why Exposed Metal Pipes Rust Faster in Industri...

    Learn why exposed metal pipes rust faster in industrial facilities and discover practical corrosion prevention strategies for humid, outdoor, and chemical-exposure environments.

    Why Exposed Metal Pipes Rust Faster in Industri...

    Learn why exposed metal pipes rust faster in industrial facilities and discover practical corrosion prevention strategies for humid, outdoor, and chemical-exposure environments.

1 3
View all