Sprinkler Systems

M&P Fire Protection are leading specialists in the design, supply, installation and maintenance of commercial fire sprinklers, including wet, alternate, dry pipe and pre-action sprinkler systems. We are certificated to Level 3 under the LPS 1048 scheme and are third party audited by the Loss Prevention Certification Board (LPCB).

All design, installation and maintenance work we carry out will be in line with the latest British standards, the current one being BS EN 12845:2015.

The automatic fire sprinkler system is the most widely used fire protection system today. Sprinklers have been used to protect property and life since 1872 and modern innovations have made fire sprinklers even more effective at combating fire. These systems are designed to protect property or life as specified by the various automatic fire sprinkler standards. Within commercial properties, the British standard BS EN 12845:2015 would be used. In special circumstances, some of our systems are designed and installed to NFPA 13 and FM Global standards. Over 40 million sprinkler heads are fitted worldwide every year.

Sprinkler systems are simple in design. However, to comply with building regulations, the insurer or fire officer, they must adhere to the standards to achieve compliance.

A Sprinkler system comprises of three main components:

  • A water supply, which may be the town mains in the street (if adequate in capability); A sectional water tank and pump set or similar self-contained water source.
  • A means of controlling the supply of water into the sprinkler system, usually comprising sets of valves, a network of pipes and individual zones.
  • An array of sprinkler heads strategically placed throughout the protected area to the requirements of the relevant standard. Diversion to the standard would be issued as a variation non-conformity.

Sprinkler systems can come in various forms, depending on the use of the area, protection requirement and environment.

  • Wet systems

    The most common conventional installation used in most applications. Pipework is permanently charged with water, ready to be discharged in the event of a fire.

  • Dry systems

    Used in areas where the temperature is sub-zero and prone to freezing. The pipework is pressurised with air; once the air pressure is reduced due to a head activation, the control valve will release water into the pipework.

  • Deluge systems

    Used generally to protect high hazard industrial areas and fuel/gas tanks as once activated, all heads are operated to completely envelope the fire in water.

  • Alternate systems

    Systems that change between being wet and dry, depending on the time of year, are generally not installed any longer due to the high maintenance costs and internal rust issues. We can service and maintain these systems.

  • Foam systems

    Used in high hazard areas normally around fuel such as in aircraft hangars, the water within the system is mixed with a low or high expansion foam solution to create an effective means to cover the fire and extinguish it.

  • Pre-action systems

    Pre-action systems are best used in areas where sprinklers would need to be activated in extreme fire situations for example server rooms. Generally single knock or double knock are used, Single knock requires both the sprinkler and an electrical alarm such as heat/smoke detector to be activated for water to be discharged. Double knock is where the sprinkler and two electrical alarms have to be activated for water to be discharged.

Throughout the year, we can carry out the service and maintenance of your sprinkler systems. We offer a competitive price, so please call today for a free no-obligation quote.

Our inspection procedure includes:

  • Operating control valves and testing tamper switches.
  • Ensuring local and electronic alarm devices function properly.
  • Operating inspectors test valves to ensure operation of flow switch(es).
  • Performing flow test on system or pumps.
  • Inspecting sprinkler heads for rating, damage, obstructions or corrosion.
  • Testing water flow and operation of fire pumps and jockey pumps.
  • Trip testing dry-pipe, pre-action and deluge valves as applicable.
  • Inspecting gravity tanks, reservoirs and pressure tanks.
  • Replacing rubber seals on valve sets.
  • M&P provides you with a detailed report of the operation and condition of your system.


99% of fires were controlled by sprinklers alone.

FACT No. 2
60% of fires were controlled by the spray from no more than 4 sprinklers.

FACT No. 3
Accidental discharge of water from all causes is 1 in 500,000 (per year of service).

FACT No. 4
Accidental discharge of water due to manufacturing defects is 1 in 14,000,000 (per year of service).

M&P Fire Protection Ltd. is part of PTSG, a UK market leader that specialises in access and safety, electrical services, specialist building access and fire solutions.

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