When it comes to fire safety, understanding the different types of fire systems is crucial for business owners and building managers.
Two of the most common fire suppression systems are wet fire systems and dry fire systems. Each are designed to meet different needs, depending on the building’s purpose and environment. We break down the key differences, the benefits of each, and help you determine which system is best for your property.
Which types of buildings are wet fire systems best for?
Wet fire systems are ideal for buildings that require constant protection, such as:
- Office buildings
- Retail spaces
- Warehouses
- Residential complexes
These systems work by keeping water constantly within the pipes, ready to flow out and suppress a fire as soon as it’s detected. Wet systems are best for environments that are at risk of fire throughout the year and are typically found in areas with stable climates, where the pipes are unlikely to freeze.
· Wet-pipe sprinklers must be designed, installed and commissioned per AS 2118.1.
· Dry-pipe sprinklers fall under AS 2118.4 for design and installation.
· AS 185-2012 then governs the routine servicing of both wet and dry systems
Which types of buildings are dry systems best for?
Dry fire systems are more suitable for buildings where water in the pipes might freeze, or where fire hazards are intermittent, such as:
- Cold storage facilities
- Factories with high-risk machinery
- Unheated spaces
- Areas with extreme temperatures
Dry systems keep air or nitrogen in the pipes instead of water. When a fire is detected, the air is released, and water is sent through the pipes to the sprinkler heads. These systems are perfect for environments where the risk of freezing pipes is high or where water could cause damage to sensitive equipment or materials.
How each system works
Wet systems: Water is constantly pressurised and stored in the pipes, ready for immediate action. When a fire is detected, the system activates, spraying water through the sprinkler heads to suppress the fire. These systems are quick to respond and provide reliable protection in environments where water damage is not a concern.
Dry systems: Instead of water, these systems use compressed air or nitrogen to keep the pipes dry. When a fire is detected, the air is released, and water is sent through the pipes to extinguish the fire. These types of fire systems are slower to respond than wet systems, but they are essential for areas where freezing is a risk.
Differences between wet and dry systems
Response time: Wet systems tend to have a faster response time as water is immediately available to be released, while dry systems take slightly longer due to the release of air before water is delivered.
Cost and maintenance: Wet systems are generally simpler to install and maintain but may require more upkeep to ensure the water supply is adequate. Dry systems require more complex installation and maintenance but are necessary in specific environments like unheated spaces.
Environment suitability: Wet systems are suitable for stable temperature environments, while dry systems are ideal for areas prone to freezing temperatures or where water could cause significant damage.
Australian standards compliance: Both fire protection systems must comply with Australian Standards, including AS 1851 for maintenance of fire protection systems and equipment. Regular inspections and testing are required to ensure ongoing compliance and effectiveness of these fire suppression methods.
How Coastal Fire Services can help
Our team offers expert installation, testing, and maintenance of both wet and dry fire systems. We ensure that your system is compliant with NSW fire safety regulations, functional, and tailored to the specific needs of your building.
Whether you’re choosing a wet or dry system, regular maintenance is essential to ensure the systems operate correctly when needed most. Our team can also provide guidance on system upgrades, replacements, and compliance with Australian fire safety standards.
In NSW, buildings are mandated to submit an annual or supplementary Fire Safety Statement, as specified by the Environmental Planning and Assessment (Development Certification and Fire Safety) Regulation 2021. Our team can help ensure your fire systems meet these requirements, protecting not just your property but the lives of everyone within it.
Not sure which fire system is best for your building? Get in touch with our team to discover which system is right for your property. Let us help you safeguard your premises with the right fire protection system.
