Learn about our systems, services & working methods
- Frequently asked questions
How does the sprinkler system work?
Residential and domestic sprinklers systems are permanently charged with water. The sprinkler heads are made up of a plug, a bulb/ fusible link, a deflector plate and a cover plate.
As the heat builds near to a sprinkler head it must reach 57°c+ before the cover plate falls away revealing the sprinkler head. As the temperature increases further to 68°c+, the bubble in the bulb expands breaking the glass or the solder melts on the fusible link (depending on the head type) releasing the plug and allowing the water to flow.
Sprinklers for this application are mechanically heat activated only so false alarms do not happen.
How long does installation take?
This depends on the size of a system. As a rough guide, a small 3-bedroom house (new build) would take 2 days. With installation, most of the work is undertaken at what we call ‘first fix’ which is installing the pipe and heads while we have access to the ceiling/floor voids.
Once all the pipework and heads are installed, we pressure test to ensure the integrity of the pipework. Much later in the project we return for second fix. This involves cover plates for the heads (after decoration is finished) and the system delivery equipment (mains connection/ pump and tank).
Lastly it’s commission time – we carry out a flow and pressure on the installed system to ensure it meets the design requirements.
Can you retrofit a fire sprinkler into homes?
Yes, but this will extend the installation time and may require additional work, such as redecoration, plastering, or boxing in, which would not be included in our scope.
How much does a sprinkler system cost?
The cost of installing a fire sprinkler system can vary based on the system type, risk category, installation method, and the number of sprinkler heads required. For example, a new-build 3-bedroom house may cost approximately £2,400 for a mains-fed system. Contact us for a free quotation.
Will all the sprinkler heads go off if there is a fire?
This is a common question, often influenced by Hollywood! Sprinkler heads in domestic and residential systems are individually heat-sensitive. Each head contains a bulb or fusible link that will pop or melt at a temperature of 74°c, So, to answer the other common question: “Will they go off if I burn the toast?” – only if the toaster itself is on fire!
If we install sprinklers do we still need smoke detection?
Yes, smoke detection should always be the first line of defence. Good smoke detection systems will go off as an early warning enabling evacuation or potential to preventing ignition.
Do sprinklers need regular maintenance like my boiler?
Yes, sprinkler systems should be checked annually to ensure they continue to perform as designed. However, the frequency of maintenance may vary depending on the category of the system. For systems installed to BS 9251:2014 and 2021 standards, a system data label should outline the design flow and pressure details. If these are not met, it could affect the system’s performance.
Explore more about our Service & Maintenance
How long will a safety check take?
The duration depends on the size of the system and the number of valves. For example, a small 3-bedroom house typically takes 45 minutes to 1 hour, costing approximately £120.00.
If there is a fault will the sprinklers still work?
The reliability of the system depends on its supply. It relies on a continuous water supply for mains-fed systems, which can sometimes be interrupted. While mains water is considered a reliable source under British standards, changes may affect the system’s performance.
This is why checking your system at least once a year is best practice.
The reliability of pump and tank systems depends on the power supply. The British standard recognises the general reliability of services in the UK. The system designer is responsible for determining the most reliable setup and, if necessary, implementing monitoring or backup systems to ensure continued operation.
Will sprinklers affect my insurance?
There is typically little to no change in premiums for installing residential sprinklers. We recommend contacting your insurance provider and discuss this with them directly.
If the sprinklers activate how much damage will they cause?
If sprinklers activate due to a fire, they will cause far less damage than an uncontrolled fire and significantly less than the fire brigade’s response. On average, a single sprinkler head releases around 50 litres of water per minute, while a fire hose can discharge up to 1,200 litres per minute. This means the water damage caused by sprinklers is much more contained, minimising the overall impact on your property compared to a large-scale firefighting operation.