Fire Protection Sprinkler Systems

Manufacturing Sprinkler Tanks for over 60 Years – LPCB approved

Dewey Waters sprinkler tanks are compatible with all types of sprinkler systems

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A fire sprinkler system is a method which was originally was designed for industrial & commercial buildings as a fire protection method, a system of pipes would be installed in the building, water is pumped through the pipework and released through a sprinkler head in the event of a fire.

Dewey Waters is a certified supplier of LPCB sprinkler tanks which are trusted by businesses, municipalities and their insurers who rely on the availability of an emergency water supply to sprinkler systems in the event of a fire. Due to the dangerous and destructive nature of fire, fire protection systems and their components must meet the stringent regulations outlined in LPS1276.

We pride ourselves on rigorous training and inspection processes which continue to evolve to changing water safety regulations.
Losses from fires in buildings protected with sprinklers are estimated to be 1/10 of those in unprotected buildings.

In buildings fully protected by Fire sprinkler systems:

  • 99% of fires were controlled by sprinklers alone
  • 60% of fires were controlled by the spray from no more than 4 sprinklers
  • Accidental discharge of water from all causes is 1 in 500,000 (per year of service)
    – Source: LPC
  • Accidental discharge of water due to manufacturing defects is 1 in 14,000,000 (per year of service)
    – Source: FM (USA) and LPC (UK) statistics/Source: European statistics over 10-year period

Fire Sprinkler Tanks

Dewey Waters LPCB Sprinkler Tank assembled

  • Sprinklers Save Lives
  • Stop fires before they damage the property
  • Relatively Inexpensive
  • Reduce Insurance Premiums
  • GRP Water tanks – Low Maintenance


Types of Fire sprinkler systems


  • Wet Pipe

  • These are the most common systems – commonly used in buildings where there is no danger of freezing. Water is available in the pipes above the sprinkler heads which guarantees a very quick reaction time in the event of a fire. Wet pipe sprinkler systems are required for multi-storey or high-rise buildings and for life safety.
    LPCB GRP Sprinkler water storage tank installed

  • Alternate

  • Alternate Sprinkler system in the summer the pipes are full of water, these are drained down and replaced with air (compressed air) for the winter.

  • Dry pipe

  • Sprinkler system is filled with compressed air, once a fire is detected and the sprinkler head opens the air pressure drops opening the valve allowing water to flow into the pipework and extinguish the fire.

  • Pre-action

  • Similar to dry pipe, the pipework is filled with air, water is released through the system when the detector sensors smoke. (These are common in buildings where it is not suitable to have pipework full of water permanently)

Types of Fire Sprinkler Tanks

  • Single supply tank

  • A Water storage tank which shall be designed and protected against corrosion such that the need for emptying the tank for maintenance is reduced to a period of not less than 3 years (maintenance check max. every 3 years).

  • Superior supply tank

  • A Water storage tank which shall be designed and protected against corrosion such that the need for emptying the tank for maintenance is reduced to a period of not less than 10 years (maintenance check max. every 10 years).

  • A Life Safety System

  • A ‘term applied to sprinkler systems forming an integral part of measures required for the protection of life, especially where evacuating the building depends on the performance of the sprinkler system and sprinklers are required expressly for life safety purposes’. A key feature of the system is that during servicing the sprinkler installation shall be fully operational in all aspect.
    We offer both superior and life safety, because of the nature and quality of our product single supply isn’t applicable.


Calculating Water Tank Capacities for sprinkler systems

LPCB tanks are always sized from an ‘Effective Capacity’. This can only be achieved by obtaining the suction (outlet) size and is calculated as follows: L x W x (H-water loss to air gap & vortex plate position).

Water capacity is reliant on on a number of issues applicable to individual applications. Capacity levels are determined by the following:

  • Hazard classifications – usually the larger the hazard, the greater volume of water is required
  • Duration of water supply
  • Mains refill capabilities – refill duration limits are outlined in BS EN12845, BS 9251
  • Full holding or reduced capacity – reduced capacity may be acceptable where the main refill capabilities are sufficient to make up the water requirement balance within the “time” regulations for specific hazard classifications
  • Wet or dry pipe system
  • Range between the highest and lowest sprinkler. Sprinkler design standard

LPCB sprinkler tanks in a range of capacities

Completed installation of a LPCB Sprinkler tanks
Dewey Waters LPCB tanks range in capacity from up to 1,300m3. Fire Tanks are manufactured from GRP, as its robust properties are exceptional for longevity and durability.
The tanks are built onsite and are constructed by our professionally trained site crews. Each tank is constructed to ensure minimal maintenance work is required, limiting the necessity to drain down the tank. Our GRP sprinkler tanks are suitable for inside and outside applications.

Sprinkler tanks:

Commercial & industrial water tanks sizes ranges in volume up to 1,300m3.

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