Fire sprinkler systems are highly effective fire protection measures that use water and pressure. Modern industrial manufacturing and warehouse buildings have these systems but many older buildings do not. The cost of fire insurance is often higher for buildings without sprinklers.

Under National Fire Protection Association NFPA 25, Chapter 5, as amended by Title 19 of the California Code of Regulations, Section 904.1, fire sprinkler systems in all types of buildings are required to have regular inspections by a licensed fire protection company.

The 5 year system test and certification is typically paid for by the landlord but some industrial leases allow the landlord to pass this cost onto the tenant. Below are some of the key components that are tested:

• Checking fire sprinkler heads (orientation, condition, and ability to transmit liquid).
• Performing a forward flow test for backflow preventer.
• Inspecting sprinkler control valves.
• Inspecting sprinkler system alarm components.
• Inspecting and testing low-pressure alarms.
• Visibly inspecting pipes, gauges, hangers, drain valves, and all other relevant components.