• 10" Double Check Detector N Pattern With OSY Valve Ames Backflows
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Ames Backflows

3" Double Check Detector Backflow Preventor Valve With OSY Valve by Manufacturer

3" Double Check Detector Backflow Preventor Valve With OSY Valve by Manufacturer

Product code: C300NOS&Y-0300

$8,738.04
$10,485.65 $8,738.04
16% OFF

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Description

Technical Specifications (Material Focus)
The 3" Double Check Detector in the N Pattern configuration incorporates a tandem backflow prevention design paired with an Outside Screw & Yoke (OS&Y) valve, offering robust control and isolation capabilities. The body is constructed from ductile iron meeting ASTM A536 specifications, coated for corrosion resistance to ensure longevity in diverse installation conditions. Internal components such as springs and fasteners are manufactured from 300-series stainless steel, delivering durability and resistance to corrosion. Check modules utilize engineered thermoplastics, selected for wear resistance and stable sealing performance. Elastomer seats are made from EPDM, known for resilience and effective sealing against water contaminants, with reversible and replaceable discs for ease of maintenance.

Regulatory Compliance
This assembly is engineered to meet critical industry and safety standards necessary for commercial fire protection and potable water safeguarding applications. It carries UL Listing per UL 1469, verifying its suitability for fire service water control applications. The device is FM Approved, confirming its approved performance under Factory Mutual standards for fire protection equipment. Additionally, it meets ASSE 1015 backflow prevention standards, ensuring compliance with public health requirements. The assembly fulfills specifications outlined by the American Water Works Association (AWWA C510), supporting installation according to established municipal guidelines.

Operational Compatibility
Rated for continuous operation up to 175 PSI (12.1 bar), the 3" Double Check Detector accommodates typical fire protection system pressures, including high-demand sprinkler and standpipe lines. The OS&Y valve offers full visual indication of valve position, facilitating straightforward system maintenance and testing. Connection options include flanged ends conforming to ANSI B16.1 and grooved ends per AWWA C606 standards, allowing versatile integration into a wide range of mechanical rooms or underground piping configurations. The assembly supports installation in both horizontal and vertical orientations, with upward flow to optimize operational reliability and prevent water stagnation.

The 3" Double Check Detector N Pattern with OS&Y Valve excels in applications requiring reliable detection and isolation of fire line pressure changes to monitor unauthorized water use or leakage while maintaining backflow prevention. It is ideal for municipal water systems, commercial buildings, and industrial facilities where potable water protection and fire system integrity are mandated. The OS&Y valve design significantly simplifies quarterly and annual inspection tasks by providing positive valve shutoff and easy access. Its rugged ductile iron construction and corrosion-resistant internals ensure long-term performance under harsh environmental conditions.

This product addresses common challenges faced by fire protection system engineers and facility managers by combining backflow prevention with detection capability, enabling early leak or usage identification to reduce water loss and system failures. Unlike standard check valve assemblies, the integrated detector port facilitates connection of pressure differential monitoring equipment, allowing remote diagnostics to conform with NFPA 13 and NFPA 25 inspection procedures.

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Product Details


Technical Specifications (Material Focus)
The 3" Double Check Detector in the N Pattern configuration incorporates a tandem backflow prevention design paired with an Outside Screw & Yoke (OS&Y) valve, offering robust control and isolation capabilities. The body is constructed from ductile iron meeting ASTM A536 specifications, coated for corrosion resistance to ensure longe...
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Frequently Asked Questions

The Fire Protection Parts Difference: Your Specialized Partner for Critical Components. Call us (866) 906-1526.

At Fire Protection Parts, we understand that maintaining effective fire suppression systems requires readily available, high-quality components. We are not a general supplier; our exclusive focus is on fire protection parts, which allows us to offer unparalleled expertise and a comprehensive inventory in this vital niche.

Why Choose Fire Protection Parts?
Unwavering Product Specialization: Our deep focus on fire sprinkler system components, and specific types of suppression system valves ensures our knowledge and resources are entirely dedicated to your systems' intricate needs.

Exceptional Customer Experience: Customers consistently praise our great communication, excellent service, and helpful support. We prioritize clear and timely interactions to meet your needs efficiently.

Streamlined Online Platform: Our website, Fireparts.com, is well-organized and easy-to-navigate, simplifying procurement. Find the exact parts you need quickly with detailed information and an efficient ordering process.

Reliability and Speed: Timely delivery is critical. We are committed to prompt and reliable shipping, ensuring you receive necessary parts quickly for scheduled maintenance or urgent repairs.

Dedicated Technical Support: Our team offers knowledgeable technical support to assist with part identification, troubleshooting, and informed decision-making.

Choose Fire Protection Parts as your partner. We deliver specialized products with exceptional service, technical expertise, and reliable speed, dedicated to being your trusted source for all your fire protection needs.

Ordering and Shipping Information

We strive to make your ordering process seamless and ensure your critical fire protection components are delivered promptly.

How to order

Order efficiently via our user-friendly website, Fireparts.com. Simply add products to your cart and proceed to our secure checkout. Our knowledgeable support team is available if you need assistance.

Shipping & Transit
Carriers: We primarily use reliable carriers like UPS and FedEx. For larger, heavier items, we utilize LTL freight carriers (e.g., FedEx Freight, R & L).

Origin & Handling: Most orders ship from our manufacturer's warehouse in Chicago, IL or warehouse near you. Orders are typically processed within 1-2 business days (M-F), with a 3:00 PM CST cut-off.

Transit Times (US): Standard transit is generally 2-3 business days to all US destinations, resulting in an estimated total delivery time of 2-4 business days from placement.

Free Shipping: We offer free standard ground shipping on orders in stock totaling $1,100.00 or more within the contiguous United States via FedEx Ground.

Expedited Options: Next-day and two-day air services are available for urgent needs. Contact us for quotes and availability.

International: We ship to the US, Canada, Mexico, and most international destinations. Allow 3-5+ additional business days for processing. Customers are responsible for all duties and taxes.

HAZMAT: Certain items (CPVC, fire extinguishers, etc.) cannot ship via USPS or air and may incur special fees.

Important Note for Freight (LTL)
Thoroughly inspect all LTL shipments for damage before accepting delivery. If damage is present, refuse the delivery and contact us immediately to arrange a replacement.

Once shipped, you will receive an email with a tracking number. All shipping times are estimates provided by the carriers and are not guaranteed.

Our Return Policy

Effective: April 30, 2025

Your satisfaction is important to Fire Protection Parts. Please review our policy for returns.

General Returns
We accept returns of most new, unused, and resalable items in original packaging within 30 days of receipt. A valid proof of purchase is required.

Initiation: Contact us at info@fireprotectionparts.net to start a return and obtain a Return Merchandise Authorization (RMA) number.

Shipping: The customer is responsible for all return shipping costs to: Fire Protection Parts Returns, 2135 City Gate Ln #3018, Naperville, IL, 60563.

Restocking Fee: A 25% restocking fee will be applied to all eligible returns.

Return and Refund Process
Request RMA: Email info@fireprotectionparts.net.

Package Securely: Include the RMA number clearly inside the package.

Refunds: Once inspected, refunds (less the 25% restocking fee and original shipping) will be credited to your original payment method within 14 business days.

Exceptions
Defective/Damaged Items: Contact us immediately upon receipt for instructions.

Exchanges: Place a new, separate order for the desired item and return the original for a refund (subject to terms).

Special Order Items: These are non-returnable and non-refundable unless the manufacturer accepts the return.

All products are subject to the manufacturer's warranty, not direct warranties from Fire Protection Parts. All sales are governed by our Standard Terms and Conditions of Sale.

Installation Assistance

Installation Assistance

While Fire Protection Parts specializes in providing high-quality fire protection components, we understand that proper installation is crucial for the effectiveness and safety of these systems.

For professional installation services across the United States, we recommend our trusted partner: Fire & Life Safety Consultants.

As a nationwide fire protection contractor, Fire & Life Safety Consultants offers comprehensive installation services for a wide range of fire protection systems.

To inquire about installation services, please:

Visit their website: www.fireandlifesafety.net to learn more about their services and coverage or call (800) 976-2489.

Email job information: Send the details of your installation needs to info@fireprotectionparts.net, and we will forward your inquiry to the team at Fire & Life Safety Consultants.

Please note that while we facilitate this connection, all installation services and agreements will be directly between you and Fire & Life Safety Consultants.

Technical Support

At Fire Protection Parts, we're committed to providing you with the expertise you need. If you require technical assistance with product selection, troubleshooting, or any other inquiries, our knowledgeable support team is ready to help.

Please call our experts directly at (866) 906-1526 for immediate assistance.

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