Fire Safety · Mandatory · Completion

Sprinkler / Suppression System Test and Commissioning Record

The commissioning record for automatic sprinkler and fire suppression systems, documenting installation inspection, flow and pressure tests, alarm activation tests, and water supply verification. Required by Building Control before issuing completion certificates for buildings where sprinklers are mandatory.

Last reviewed: 29 March 2026 — This guide reflects UK law as of this date. BS EN 12845 / LPS 1301 / RRO 2005 remains current with no amendments enacted as of 29 March 2026. Next scheduled review: 29 March 2027.

Legal basis	BS EN 12845 + LPS 1301 + Regulatory Reform (Fire Safety) Order 2005 (RRO)
Mandatory in England	Sprinkler systems are mandatory in residential buildings over 11m in height in England under Building Regulations Approved Document B
Commissioning	Must be carried out by an LPS 1301 certified engineer — the commissioning certificate is required before Building Control will sign off occupation
Ongoing testing	Weekly alarm valve test + quarterly and annual inspections required under BS EN 12845 to maintain system integrity

1. Sprinkler Commissioning — The Last Life Safety Step Before Occupation

Sprinkler systems are the most effective passive fire suppression measure available in a building. When properly designed, installed, and commissioned, they control or extinguish a fire in its early stages, protecting life, limiting property damage, and providing additional time for evacuation. Building Control expects a commissioning certificate from a certified engineer before occupation is permitted on any building where sprinklers are required or specified.

Commissioning is not simply turning the system on. It is a structured process that verifies every component of the system — from the water supply and pump sets through the distribution pipework, alarm valves, flow switches, and individual sprinkler heads — operates correctly and meets the design specification. The commissioning must be carried out by an engineer certified under LPS 1301 (Loss Prevention Standard for the approval of sprinkler installers). The resulting commissioning certificate is a critical handover document and a condition of the building's fire strategy.

Allow adequate time for sprinkler commissioning

Sprinkler commissioning requires the water supply to be live, pressure testing to be complete, alarm integration with the fire alarm panel to be operational, and flushing of the entire system to remove debris. Each of these activities needs programme time. Compressing commissioning into the final days before handover creates the risk that defects are not resolved, the commissioning certificate is delayed, and occupation is held up. Programme sprinkler commissioning as a critical-path activity with adequate float.

2. Key Content

The following table sets out the key content areas that should be covered in a Sprinkler / Suppression System Test and Commissioning Record, with guidance on the information each section should capture.

Record section	What to include
System details	Building address, system type (wet, dry, pre-action, deluge), hazard classification (Light Hazard, Ordinary Hazard, High Hazard), design standard (BS EN 12845, NFPA 13), number of sprinkler heads, zones, and coverage area. Include the fire strategy reference and confirm the system's role within the overall fire safety design.
Installer	Name of the installing contractor, LPS 1301 certification number, FIRAS or equivalent third-party accreditation, project manager, and commissioning engineer. The installer must be LPS 1301 approved for the system to be certified.
Design	Design engineer, design standard, hydraulic calculation reference, water supply assessment, and confirmation that the design has been reviewed and approved by the insurer or third-party certifier. Note any design changes made during installation and confirm they have been approved.
Pre-commissioning inspections	Visual inspection of the completed installation — pipework supports, head positions, clearances below heads, correct head type and temperature rating for each zone, valve positions, signage, and identification of any installation defects requiring rectification before commissioning tests begin.
Flow and pressure test	Test the water supply flow rate and pressure at the most hydraulically remote point of the system. Compare measured values against the design hydraulic calculation. Record static pressure, running pressure, and flow rate. Confirm the water supply is adequate to meet the design demand for the required duration.
Water supply test	Verify each water supply source — town main, tank, pump set, or combination. Test pump start on pressure drop, duty/standby changeover, jockey pump operation, and alarm signals to the fire alarm panel and remote monitoring station. Record pump performance curves against design requirements.
Alarm test	Test each alarm valve — confirm water motor gong operation, electrical flow switch activation, signal transmission to the fire alarm panel, and remote monitoring station notification. Verify that alarm signals are correctly zoned and identified at the fire alarm panel. Test alarm silencing and reset procedures.
Flushing	Flush the entire system to remove installation debris, flux, pipe scale, and contaminants. Flush each zone until the water runs clear. Record flushing date, duration, and confirmation that the system is clean. Debris left in the pipework can block sprinkler heads and prevent operation in a fire.
Commissioning certificate	The LPS 1301 commissioning certificate issued by the certified commissioning engineer confirming that the system has been tested, meets the design specification, and is fit for purpose. The certificate must reference the design standard, installer, system type, coverage, water supply, and test results. This document is required by Building Control before occupation.
Handover	Documents to be handed over to the building owner or responsible person: commissioning certificate, as-installed drawings, O&M manual, hydraulic calculations, maintenance schedule (weekly, quarterly, and annual inspection requirements under BS EN 12845), and spare head cabinet with the correct quantity and type of spare sprinkler heads and fitting tool.

3. Common Mistakes

Not commissioning the system before occupation

A sprinkler system that has been installed but not commissioned is a system that cannot be relied upon to operate in a fire. Without commissioning, there is no verification that the water supply is adequate, that the alarm valves function, that signals reach the fire alarm panel, or that every sprinkler head is correctly installed and unobstructed. Building Control should not permit occupation of a building with an uncommissioned sprinkler system, but programme pressure and commercial urgency can lead to attempts to occupy before commissioning is complete. The commissioning certificate is a life safety document — it must not be treated as a snagging item to be resolved after occupation.

4. Frequently Asked Questions

Are sprinklers required in all new homes in England?▾

No. In England, sprinkler systems are mandatory only in residential buildings over 11m in height, as required by Building Regulations Approved Document B (amended 2020). Detached houses, terraced houses, and low-rise flats below 11m are not required to have sprinklers under current English regulations, although many fire authorities recommend them. Wales has gone further — since 2016, all new dwellings in Wales must be fitted with sprinkler systems regardless of height, under the Domestic Fire Safety (Wales) Measure 2011. In Scotland, sprinklers are required in certain building types including care homes, high-rise flats, and large multi-storey buildings under the Scottish Building Standards.

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