A suppression system is a promise that has to be kept exactly once — and the installation decides whether it will be. Gemini AMPM installs and commissions gas suppression to BS EN 15004 and ISO 14520: pipework, nozzles, cylinder banks, detection integration and the testing that proves the lot before handover. BAFE SP203-1 certificated. NSI Gold approved.
Our engineers install to the hydraulically calculated design, not near it. Pipework is routed, bracketed and supported to specification; nozzles go exactly where the calculations put them; cylinder banks and manifolds are assembled, secured and labelled. We work cleanly in live environments — operational data halls, occupied offices, trading floors — with dust control, protected floor routes and out-of-hours phasing where the building demands it.
Every stage of the installation is tested as it goes. Pipework is pressure-tested before connection, then puff-tested with nitrogen to prove each nozzle path is clear and unobstructed. As-fitted drawings record what was actually built. It is the unglamorous discipline BS EN 15004 and ISO 14520 demand — and the reason our systems pass commissioning first time rather than third.
A suppression system is only as good as the signals that fire it. We integrate the releasing system with new or existing fire detection: coincidence detection, releasing panels, time delays, hold and abort controls, plant shutdowns and damper interfaces, all built against an agreed cause-and-effect matrix. Gemini is BAFE SP203-1 certificated for fire detection and alarm, so the releasing chain is designed and signed off by one certificated contractor.
Commissioning is where we prove it: functional testing of every input, output and interlock, discharge-circuit and actuation testing, enclosure checks and full cause-and-effect verification witnessed with your team. You get commissioning certificates, O&M manuals and operator training before we leave — documentation your insurer will actually accept, not a folder of loose ends.
Yes — most of our installations happen in buildings that cannot stop. We phase works around your operation: out-of-hours pipework, protected routes through occupied areas, coordinated isolations agreed in advance and clean working throughout. Method statements and risk assessments come as standard, and Gemini holds CHAS Elite accreditation for health and safety. The protected room stays in service until the switchover is planned and agreed.
Everything short of releasing the agent. Pipework is pressure-tested and nitrogen puff-tested to prove nozzle paths are clear. Actuation circuits are tested, detection coincidence and time delays are proven, and the full cause-and-effect — alarms, shutdowns, dampers, releases — is functionally verified and witnessed. The enclosure is checked against the design assumptions. You receive commissioning certificates and as-fitted documentation, giving your insurer evidence rather than assurances.
Yes, with one condition: we review the design first. Before installing to another consultant’s drawings we check the agent quantities, hydraulics, venting and detection interfaces against BS EN 15004, and flag anything that will not pass commissioning. It protects you from inheriting a paper system that fails at handover. If the design stands up, we build it exactly. If it does not, you find out before the pipework goes in.
A named engineer, not a call centre, comes back within 24 hours. Tell us the building and what you’re dealing with, and we’ll scope it properly.