Drain Valve

Drain Valve for Controlled Fire-System Drainage

A drain valve provides a deliberate route for discharging water from a selected part of a water-based piping system. It is normally kept closed during service and opened when controlled drainage is required under an approved procedure.

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Controlled Discharge Path

The valve connects the system side to a defined drain outlet. When opened, water is directed away from the protected piping through the intended drainage route. The receiving drain, discharge piping, and safe disposal point must be appropriate for the expected water volume and site conditions.

Key Functional Features

• Manual operation provides controlled opening and closing.
• Creates a defined system-to-drain flow path.
• Can support planned maintenance, servicing, or approved system drainage.
• A dedicated outlet helps keep the discharge route identifiable.

Typical Applications

Drain valves may be installed at system low points, riser drains, equipment connections, test-and-drain arrangements, and maintenance sections. Their location should allow safe access while avoiding uncontrolled discharge onto electrical equipment, occupied areas, or unsuitable surfaces.

Project Specification Notes

Valve style, outlet arrangement, nominal size, connection type, pressure rating, material, lockable handle, sight glass, test orifice, and approvals vary by product. A simple drain valve is not automatically a combined test-and-drain assembly. The correct configuration should be confirmed from the approved drawings and technical submittal.

Standards and Maintenance References

Consult NFPA 14 for applicable standpipe and hose system provisions and NFPA 25 for inspection, testing, maintenance, and drainage-related procedures. The locally adopted requirements and site safety plan remain controlling.