• 8" Double Check Detector W/Grooved Butterfly Valves - Fire Protection Parts
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Ames Backflows

2-1/2" Double Check Detector Backflow Preventor Valve Durable Ductile Iron Assembly for Fire Protection Systems

2-1/2" Double Check Detector Backflow Preventor Valve Durable Ductile Iron Assembly for Fire Protection Systems

Product code: M300OS&Y-0250

$5,276.80
$6,332.15 $5,276.80
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Description

Technical Specifications (Material Focus)
The 2-1/2" Double Check Detector assembly integrates a robust body crafted from ductile iron (ASTM A536) designed to endure continuous exposure to mechanical room and outdoor environments common in fire protection infrastructure. Internal components are composed of 300-series stainless steel alloys, including springs and fasteners, which resist corrosion and ensure operational longevity. The dual check valves contain high-strength glass-filled thermoplastic check modules paired with EPDM elastomer seats that are reversible and replaceable for reliable sealing against backflow. The detector incorporates an OS&Y (Outside Screw & Yoke) gate valve for positive shutoff and a Y-strainer to prevent debris from impeding flow and valve function.

Regulatory Compliance
This assembly satisfies critical regulatory requirements to support fire protection water systems:

  • UL Listing: Certified under UL 312 standard for backflow prevention assemblies.
  • FM Approval: Tested and approved by Factory Mutual for fire protection service applicable to detector check valves.
  • ASSE Standard 1015: Complies with ASSE certification for double check detectors used in non-health hazard conditions.
  • NFPA Compliance: Facilitates adherence to NFPA 13 for sprinkler installations and NFPA 25 requirements for inspection, testing, and maintenance of fire protection systems.

Operational Compatibility
The system operates reliably up to a maximum working pressure of 175 PSI (12.1 bar), suitable for most municipal and industrial fire protection water lines. Connection options include durable grooved ends meeting AWWA C606 standards, enabling quick and secure installation with grooved coupling systems commonly used in fire protection piping. The design supports installation flexibility in both horizontal and vertical orientations, ensuring compatibility with varied mechanical layouts. The integrated OS&Y valve provides visible indication of open or closed status for straightforward system operation and maintenance.

This 2-1/2" Double Check Detector with OS&Y valve is engineered to detect unauthorized backflow events within fire protection water supplies, preventing pollutants from contaminating potable water networks. Its durable materials and compliant certifications make it ideal for municipal water authorities, fire protection contractors, and facility managers tasked with maintaining code-compliant, reliable fire suppression infrastructure. The dual check valves coupled with the OS&Y valve and Y-strainer deliver a comprehensive solution for continuous water quality assurance and detection within fire sprinkler systems. This assembly notably reduces maintenance complexity with its replaceable seats and modular internal components, along with facilitating required runoff and functional testing through accessibility features included in the design.

Compared to simpler check valves or assemblies lacking integrated detection and shutoff valves, this product enables real-time monitoring and isolation of flow paths, supporting proactive maintenance and minimizing downtime during inspections. Installation is expedited by the grooved end connections and pre-engineered integration of multiple functions (check valves, strainer, and shutoff valve) into one compact unit, making it an efficient choice for upgrading existing fire protection water lines or new system builds.

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Product Details


Technical Specifications (Material Focus)
The 2-1/2" Double Check Detector assembly integrates a robust body crafted from ductile iron (ASTM A536) designed to endure continuous exposure to mechanical room and outdoor environments common in fire protection infrastructure. Internal components are composed of 300-series stainless steel alloys, including springs and fasteners, which re...
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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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