How often to check pressure/quantity if clean agent system?

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Maintenance frequency for a clean agent fixed fire suppression system is focused on confirming the system still contains the proper amount of agent and that its pressure indicators reflect a ready-to-fire condition. These systems are sealed and designed to be stable over long periods, so daily, weekly, or even monthly checks aren’t typically necessary. A semi-annual inspection strikes the right balance: it allows time for any slow loss of agent to become detectable while keeping maintenance practical. In practice, you verify the cylinder weight to ensure it matches the specified charge (weight is a more reliable indicator than pressure alone, which varies with temperature), check the pressure/indicator readings, and inspect for tamper seals and signs of leakage. If the weight or pressure is out of tolerance, arrange service to recharge or repair.