| Specification | Details |
| Model Number | FEBCO 856ST |
| Product Type | Double Check Detector Assembly (DCDA) |
| Installation Type | Inline horizontal installation |
| Material | Lead-free cast bronze or ductile iron (model dependent) |
| Function | Backflow prevention with water use monitoring |
| Main Application | Fire protection systems and non-potable water systems |
| Protection Type | Backpressure and backsiphonage prevention |
| Meter Feature | Integrated bypass meter for leak and unauthorized use detection |
| Valve Design | Dual independently acting check valves |
| Connection Type | Flanged or grooved connection options |
| Construction | Corrosion-resistant body |
| Compliance Standards | ASSE 1048, AWWA C510, CSA B64.5 |
| Serviceability | Field-serviceable components with replaceable seats |
| Suitable Industries | Commercial buildings, municipal systems, industrial facilities |
| Optional Feature | Tamper switches for additional security |
The FEBCO 856ST is designed to protect water systems from contamination caused by reverse water flow. It combines a dual check valve assembly with a detector meter that identifies leaks and unauthorized water use. This system is widely installed in fire sprinkler systems, secondary water networks, and industrial water applications where continuous monitoring is required.
At Deluxe Plumbing Supplies, this product is commonly selected for projects requiring a reliable Backflow Preventer solution for large-scale infrastructure and commercial buildings.
The assembly contains two independently operating check valves arranged in series. Water flows normally in one direction, while reverse flow immediately triggers the valves to close.
The working principle is closely related to the Double check valve concept, which uses multiple valve stages to provide additional protection against water contamination in plumbing systems.
The built-in bypass meter performs two important functions:
This monitoring capability makes the unit more advanced than standard valve assemblies.
The FEBCO 856ST performs effectively in several environments:
Many engineers select this Backflow Preventer because of its suitability for medium hazard applications.
The FEBCO 856ST uses durable materials for long-term operation:
| Component | Material |
| Valve body | Ductile iron or lead-free bronze |
| Check seats | Stainless steel |
| Disc rubbers | Replaceable rubber components |
| External coating | Corrosion-resistant epoxy finish |
These materials help improve lifespan and reduce maintenance requirements.
Fire protection systems require water to remain uncontaminated and available during emergencies. The FEBCO 856ST supports these systems by:
For large fire system installations, Deluxe Plumbing Supplies frequently supplies this Backflow Preventer for safety-focused infrastructure projects.
The FEBCO 856ST is manufactured to comply with recognized industry requirements:
Compliance with these standards supports reliable operation in regulated plumbing environments.
The system is engineered for convenient servicing without extensive disassembly.
Maintenance advantages include:
Routine inspection helps maximize operating efficiency.
Plumbing components operate under varying environmental conditions. Corrosion-resistant materials help:
This makes the FEBCO 856ST suitable for demanding environments and long-term installations.
Deluxe Plumbing Supplies supplies commercial-grade plumbing and water safety products for Qatar projects requiring durability and compliance.
Customers benefit from:
FAQ
The primary function is preventing contaminated water from flowing backward into clean water systems while also detecting leaks and unauthorized water usage.
The unit is primarily intended for non-potable and medium hazard applications such as fire protection systems and industrial water lines.
Yes. The integrated bypass meter identifies leaks and unauthorized water usage within the connected system.
Yes. It is commonly installed in fire sprinkler and standpipe systems where monitoring and backflow protection are required.
Yes. Routine testing and inspections are recommended to ensure proper valve performance and compliance.
The FEBCO 856ST is designed primarily for horizontal inline installation.
Yes. Replaceable seats, disc kits, springs, and maintenance kits are available for servicing and long-term use.
