The FEBCO 856ST DCDA Backflow Preventer is engineered to provide reliable protection against backpressure and backsiphonage, specifically in non-potable water systems like fire protection lines. This assembly features a metered bypass line that detects unauthorized water use or leakage — making it both a backflow preventer and a usage detector in one.
With a double-check valve system housed in a durable, corrosion-resistant body, the 856ST is ideal for Qatar’s commercial buildings, fire protection zones, and municipal infrastructure projects requiring stringent compliance and water safety.
Double check valve assembly for medium hazard protection
Integrated bypass and meter for unauthorized use detection
Corrosion-resistant construction (lead-free bronze or ductile iron)
Inline, horizontal configuration with flanged or grooved connections
Designed for minimal pressure drop and long-term service
Meets ASSE 1048 and AWWA C510 standards
Optional tamper switches available for added security
Protects fire protection systems from water contamination
Detects unauthorized use or leaks in non-potable lines
Ensures code compliance for commercial and industrial sites
Durable and service-friendly design for quick maintenance
Ideal for Qatar’s safety-focused construction and MEP sectors
Best suited for:
Fire sprinkler and suppression systems
Commercial buildings with secondary water lines
Municipal and institutional facilities
High-rise and mixed-use developments
Industrial process systems requiring cross-connection protection
Install in a horizontal position with proper support
Ensure access to bypass meter for periodic readings
Test valves regularly in accordance with Qatar building codes
Use only with qualified plumbing professionals
Protect from freezing and debris where applicable
MEP contractors installing fire-rated backflow systems
Facility managers monitoring non-potable line integrity
Developers and engineers designing code-compliant water protection
Fire safety professionals overseeing fire protection equipment
Choose the FEBCO 856ST Double Check Detector Assembly for dual-purpose backflow prevention and water use monitoring in your commercial or fire protection systems. Designed to comply with international standards while meeting the needs of modern Qatar infrastructure. Order now from Deluxe Plumbing Supplies, your trusted source for commercial-grade backflow preventers and plumbing safety systems. Explore how DCDAs contribute to safe plumbing and fire protection systems.
What is the main purpose of the meter on this unit?
It detects unauthorized water use or leaks, especially important in fire suppression lines.
Can this be used on potable water lines?
No — this unit is intended for non-potable or secondary systems such as fire lines.
Is it compliant with Qatar fire and plumbing codes?
Yes — it complies with ASSE 1048, AWWA, and CSA standards, which are widely accepted.
