Materials

• Materials used in fire service installations must be:
• In accordance with AS/NZS 3500.1 and AS 2419.1
• As per approved sample with plastic pipes not specified for above ground use.
• Galvanized steel fire hydrant or booster riser pipes, fittings and couplings in accordance with Clause 9 of AS2419.1 must:
• Only be used below ground for individual hydrant risers or short connection pieces not exceeding 1.5m in length.
• Be double wrapped with a petrolatum tape for the entire length.
• Be “heavy” gauge with pipe sizes DN80 or less and may be “medium” gauge for DN100 and larger.
• Be marked with the thickness 

Features, Accessibility and Clearances 

Fire hydrants in accordance with Clause 3.2 of AS2419.1 must:

• Have the centre-line of the fire hydrant valve or outlet not less than 750mm and not more than 1200mm above the ground, floor or platform.
• Contain the requirements of Figure 7
• Have the fire hydrant valve outlet horizontal or sloping not more than 35 degrees below the horizontal
• Have a 65mm nominal diameter hose connection
• Be equipped with protective caps and secured
• Be identifiable by a disc of not less than 20mm diameter displaying the fire hydrant no.
• Clearance of not less than 1m directly in front of the fire hydrant.
• Clear space extending to not less than 500mm either side of the fire hydrant riser where the fire hydrant is classified as an external fire hydrant.
• Clearance of not less than 100mm around the handwheel of the fire hydrant valve, in both the fully closed and fully open positions.
• Clearance around the fire hydrant valve outlet of not less than 300mm through an arc of 225° in the plane of the valve outlet.

Above Ground Isolation Valves

Must:

• Be installed within fire isolated exits only, or fire plant, tank and pump rooms as per AS2419.1 Clause 8.7
• Have an identification number that corresponds with the number shown on the block plan referencing the same clause.
• Be full-flow outside screw and yoke wheel gate valves of the indicating type, or low torque wheel-operated multi-turn post indicator ball or butterfly valves with all metal actuating mechanisms, closed by rotating the wheel clockwise and must:
• be secured or locked in the open position.
• have affixed to the valve body or strap, a plate inscribed with the words ‘FIRE MAIN VALVE –SECURE OPEN’ in uppercase letters not less than 8 mm high.
• Leaver type butterfly valves cannot be used on a fire hydrant system or any pipework between the fire hydrant system and the water supply it is connected to, specifically the backflow prevention device at the property boundry.