From Drawings to Handover: What Happens During a Fire Suppression Installation Project?

A fire suppression installation usually starts with drawings, a fire strategy and a clear understanding of the building risk. From there, the project moves through system selection, design coordination, water supply and plant planning, installation, testing, commissioning and handover. Maintenance requirements should also be agreed before the construction team leaves site.

Getting those stages in the right order makes the project easier to price, programme and deliver.

NPHS supports sprinkler, water mist and specialist fire suppression projects from early design review through to commissioning and long-term maintenance.

What happens first on a fire suppression project?

The first useful step is a project review.

Before a contractor can recommend or price a suitable fire suppression system, they need to understand what the building is, how it will be used and why automatic suppression is required.

Useful information usually includes:

• Architectural drawings
• Fire strategy
• M&E drawings
• Building use and occupancy
• Ceiling heights
• Water supply information
• Plant space
• Programme dates
• Building Control comments
• Insurer requirements
• Consultant specification
• Details of any existing suppression system

Early-stage drawings are often enough to begin the conversation.

The aim at this stage is to identify the likely system route and the questions that need answering before design progresses.

Stage 1: Reviewing the drawings and fire strategy

Drawings provide the physical information. The fire strategy provides the context.

Together, they help the fire suppression contractor understand:

• Which areas require protection
• The building occupancy
• Escape strategy
• Compartmentation
• Ceiling arrangements
• Risk areas
• Potential plant locations
• Likely pipe routes
• Interfaces with other systems

A fire suppression contractor should also identify missing information rather than filling gaps with assumptions.

For main contractors and consultants, this stage helps establish a clearer scope before procurement.

Fire Sprinkler Installation UK

Stage 2: Choosing the right suppression system

The system should suit the building and risk.

Depending on the project, the likely options may include:

• Traditional fire sprinklers
• Water mist
• Gaseous suppression
• Specialist suppression for defined risks

The selection should consider the building type, fire strategy, water supply, available space, protected risk, maintenance access and relevant standard.

Water mist may suit some projects where compact equipment, smaller pipework or reduced water demand are useful.

Traditional sprinklers remain a common route for many commercial, industrial, residential and storage applications.

Specialist rooms may need another suppression technology.

The important decision is which system fits the project requirements.

Water Mist Fire Suppression System

Stage 3: Confirming the relevant standards and compliance route

Standards should be considered before detailed installation work begins.

The route depends on the system and building.

Common examples include:

Current BSI listings should always be checked at project stage because standards are amended and replaced over time.

For commercial sprinkler systems, BSI currently lists BS EN 12845:2015+A2:2026 as current. It covers design, installation and maintenance of automatic sprinkler systems, including water supplies, components, installation and testing.

BSI Knowledge: BS EN 12845:2015+A2:2026

The project fire strategy, Building Control route, insurer and client specification may introduce further requirements.

Stage 4: Planning the water supply and plant space

Water-based suppression systems need a suitable water supply.

Depending on the design, this may involve:

• Mains water
• Storage tank
• Pump set
• Dedicated water supply
• Combined supply arrangements
• Water mist pump or cylinder equipment

Plant requirements should be identified early.

The design team needs to know:

• How much space is required
• Where the equipment will sit
• How engineers will access it
• Whether power is required
• How pipework reaches the protected areas
• How drainage or testing arrangements work
• How equipment will be maintained later

Plant space can reduce as a project develops, so suppression equipment and future maintenance access should be protected in the design.

Stage 5: Coordinating nozzles, sprinkler heads and pipework

This is where the suppression design meets the rest of the building.

Nozzles or sprinkler heads need to be coordinated with:

• Lights
• Ventilation
• Smoke detectors
• Ceiling grids
• Speakers
• Beams
• Cable trays
• Ductwork
• Partitions
• Other pipe services

Pipework also needs a route through walls, risers and ceiling voids.

Coordination should happen before installation whenever possible.

For contractors, this reduces rework.

For architects, it helps keep finished ceilings tidy.

For facilities teams, it improves future access.

Water Mist System Installers UK

Stage 6: Installing the fire suppression system

Once the design and site conditions are ready, installation can begin.

The exact work depends on the system, but may include:

• Pipework
• Sprinkler heads or mist nozzles
• Valves
• Pump equipment
• Tanks
• Controls
• Test points
• Isolation points
• Alarm interfaces
• Specialist discharge equipment

The suppression contractor needs to coordinate installation with the wider construction programme.

New-build projects may be installed floor by floor or zone by zone.

Refurbishment projects may need phased works around occupied areas.

Domestic installations may require careful routing through finished or partly finished homes.

The installation programme should reflect the building, site access and wider project sequence.

Stage 7: Managing design changes during construction

Changes are normal on construction projects.

A room may change use, a ceiling may move or a new wall may be introduced. Those changes need to be reviewed where they affect the fire suppression system.

Typical changes that may require review include:

• Revised room layouts
• Altered ceilings
• New partitions
• Changes to sprinkler or nozzle positions
• Revised plant locations
• New obstructions
• Altered storage arrangements
• Changes to water supply
• Equipment substitutions

Changes should be captured properly. Final drawings and commissioning information should reflect the installed system and the approved revisions.

Stage 8: Testing and commissioning

Commissioning checks whether the completed installation meets the agreed design and project requirements.

The exact checks vary by system.

For sprinkler installations, commissioning may involve:

• Checking the installation against drawings
• Verifying valve arrangements
• Pump testing
• Pressure readings
• Flow testing
• Alarm and monitoring checks
• Inspection of sprinkler heads
• Identifying installation defects
• Recording test results

BAFSA training material for commercial sprinkler systems covers inspection against drawings, commissioning checks and the importance of documentation.

BAFSA inspection and commissioning training information

For water mist systems, commissioning may also include:

• Pump or cylinder checks
• Nozzle inspection
• System pressure checks
• Control checks
• Alarm interfaces
• Water supply checks
• Operating status
• System labelling

Commissioning should produce usable records that show what was checked and the results recorded.

Stage 9: What should be included at handover?

Handover gives the contractor, building owner or facilities team the information needed to understand and maintain the installed system.

Depending on the project, the handover pack may include:

• As-installed drawings
• Commissioning records
• Pressure test information
• Equipment schedules
• Pump data
• Valve information
• Product information
• Certification documents
• Fire-test evidence where applicable
• Control and alarm information
• Operating instructions
• Maintenance requirements
• Defect records
• Recommended service dates

The exact package should be agreed with the project team.

Why does handover documentation matter?

The construction team eventually leaves. The system stays.

Facilities managers, housing providers and building owners may rely on the handover information years later when arranging:

• Servicing
• Repairs
• Alterations
• Insurer inspections
• Refurbishment
• Compliance reviews
• Fault investigations

Incomplete records make all of those jobs harder.

The handover file should explain what was installed, how it was tested and what needs to happen next.

Stage 10: Planning maintenance before practical completion

Maintenance should be considered during design and installation.

Future engineers need access to:

• Valves
• Pumps
• Tanks
• Control equipment
• Test points
• Nozzles
• Sprinkler heads
• Filters
• Alarm interfaces

The relevant service regime should also be recorded.

A good handover should make clear:

• What needs inspecting
• Who is responsible
• Recommended service intervals
• What records need keeping
• How defects should be reported

For building managers, this creates a clearer transition from construction to operation.

Fire Suppression System Maintenance

How does the process differ for residential projects?

Residential schemes often involve many stakeholders, including:

• Developer
• Architect
• Fire consultant
• M&E consultant
• Main contractor
• Housing provider
• Building Control
• Facilities or asset team

Early coordination is particularly useful for flats, apartments, care settings and supported living projects because the system may need to fit around risers, service cupboards and repeated dwelling layouts.

Long-term maintenance also deserves attention because the eventual building owner may be responsible for the system for decades.

How does the process differ for commercial projects?

Commercial projects may involve a wider range of risks and operating conditions.

Offices, warehouses, industrial premises, hotels and specialist spaces all create different suppression requirements.

Commercial project teams should consider:

• Occupancy
• Hazard classification
• Fire load
• Storage arrangements
• Water supply
• Insurer requirements
• Business continuity
• Access restrictions
• Maintenance planning

These factors can influence whether water mist, sprinklers or specialist suppression is suitable.

What should a main contractor send before requesting a quote?

The best starting point is usually a set of drawings.

Send:

• Plans
• Sections
• Fire strategy
• Consultant specification
• Programme dates
• Water supply details
• Building use
• M&E drawings where available
• Building Control comments
• Insurer requirements
• Tender return date

If some of that information is missing, send what you have.

A technical review can usually identify the next questions.

How can early fire suppression input save time later?

Early input helps identify issues before they become site problems.

That might include:

• Insufficient plant space
• Unsuitable water supply
• Crowded ceiling voids
• Unclear system responsibility
• Missing test evidence
• Incomplete specification
• Difficult maintenance access
• Incompatible programme dates

Resolving those points at drawing stage is usually easier than resolving them after installation has started.

Frequently asked questions

What is the first stage of a fire suppression installation?

The first stage is usually a review of the building drawings, fire strategy, occupancy and project requirements. This helps identify the likely suppression system, relevant standards, water supply requirements, plant needs and design information required before installation.

How long does a fire suppression installation take?

The programme depends on the system type, building size, site access, number of protected areas, water supply, plant requirements and whether the project is new-build, refurbishment or retrofit. Larger projects are usually coordinated in phases with the wider construction programme.

What happens during fire suppression commissioning?

Commissioning checks the installed system against the agreed design and system requirements. Depending on the system, this may include pressure tests, pump checks, valve checks, nozzle or sprinkler-head inspections, alarm interfaces, flow tests and documented commissioning results.

What documents should I receive after fire suppression installation?

Handover information may include as-installed drawings, commissioning records, test results, equipment information, certification, operating instructions and maintenance requirements. The exact documents depend on the system, relevant standard and project specification.

Does NPHS provide maintenance after installation?

Yes. NPHS can provide planned inspection, servicing and maintenance for sprinkler, water mist and wider fire suppression systems. Maintenance planning can be agreed during the installation project so the building team has a clear service route after handover.

Need support with a fire suppression installation project?

NPHS supports sprinkler, water mist and specialist fire suppression projects from early review through to installation, commissioning, handover and planned maintenance.

Send us your drawings, fire strategy, specification, project programme, Building Control comments or existing system details.

We can review the project and advise on the most suitable suppression route, installation requirements and next steps.

Send your drawings or project details to NPHS