Pre-Action Fire
Sprinkler
Systems
Sprinkler protection for water-sensitive environments where accidental discharge is not an option. Designed to NFPA 13 by FML.
Protection Built for Water Sensitive Areas
A pre-action system holds water back until two independent events confirm a fire — first, a detection device activates; then, a sprinkler head reaches its threshold. Both conditions must be met before water discharges. Pipe failure, a mechanically failed head, or a false alarm cannot trigger the system on their own.
FML designs and installs pre-action systems to NFPA 13 for data centres, healthcare facilities, archives, and any environment where the consequences of accidental water damage rival the consequences of fire itself.
A detection device confirms smoke, heat, or flame. The pre-action valve opens and water fills the pipes.
A sprinkler head reaches its activation threshold. Water discharges — only at the point of fire.
What an FML Installation Involves
Site Assessment
Our engineers assess your facility and determine the right configuration — single or double interlock — based on your environment and risk profile.
- Environment sensitivity review
- Detection system compatibility
- Interlock configuration selection
- NFPA 13 hazard classification
System Design
Hydraulic calculations, pipe layout, pre-action valve specification, and detection system integration schematics. Reviewed and approved before installation begins.
- Hydraulic and pipe layout design
- Pre-action valve specification
- Detection system integration schematic
- Regulatory submission documentation
Installation
Dry pipework, sprinkler heads, pre-action valve assembly, and detection integration installed by FML’s own team. Phased installation available for live environments.
- Dry pipework and sprinkler head installation
- Pre-action valve and control panel assembly
- Detection device integration
- Phased installation for live environments
Testing and Commissioning
Full detection-to-suppression sequence testing. We verify every trigger point — no live discharge into the protected area.
- Detection trigger and valve response test
- Pipe pressurisation verification
- Sprinkler head integrity checks
- Alarm and control panel function test
Certification and Handover
NFPA 13 compliance, as-built drawings, valve maintenance schedule, and a handover briefing covering routine checks and emergency reset procedures.
- NFPA 13 compliance
- As-built drawings and documentation
- Valve maintenance schedule
- Facilities team handover and reset briefing
Ready to get your facility assessed?
Site assessments are free. Our engineers will evaluate your environment and confirm whether pre-action is the right system for your needs.
Get a System
Designed
for Your Building
Tell us about your building, your system, or your challenge. Our team will assess your needs and recommend the right solution.
24-hour emergency service available.
Call us any time for critical system faults.