What NSW RFS guidelines say
Under NSW RFS Planning for Bush Fire Protection 2019, where a dedicated fire-fighting water supply is required (usually on properties without town water), it is commonly 10,000L for lots of 1,000–10,000 m² and 20,000L for lots over 10,000 m², with a 65mm metal Storz outlet and ball valve, metal pipework, and a hardened surface for a fire truck within 4 m. Above-ground tanks for that supply need to be concrete or metal. Exact requirements depend on your development consent and bushfire assessment, so check with your certifier or NSW RFS.
A typical fire-fighting tank setup
- ✓A steel or concrete above-ground tank, or an underground tank with a 200mm access hole
- ✓65mm metal Storz outlet with a metal ball valve
- ✓Metal pipework from the tank to the valve, with the same bore
- ✓Hardened ground surface for a fire truck within 4 m
- ✓Outlet on the non-hazard side, away from the house
- ✓A static water supply (SWS) sign at the street front, as recommended in the guidelines
Keep it separate
The fire-fighting portion has to stay available, so many owners keep it as a separate tank or a reserved volume above the household outlet. Note that BASIX doesn’t count the fire-fighting portion of a tank towards your BASIX rainwater commitment.
Highlands conditions to plan for
Cold winters mean exposed pumps and pipework need frost protection. Many properties are mapped as bushfire prone, which can affect tank material and outlets. And a full tank is very heavy, so the base needs to be level and compacted. More on rainwater tanks in the Southern Highlands.
Frequently Asked Questions
How much water do I need for fire-fighting?+
It depends on your lot size, development type and consent conditions. As a guide, PBP 2019 lists 10,000L for lots of 1,000–10,000 m² and 20,000L for lots over 10,000 m² where there’s no reticulated water. Check with your certifier or NSW RFS.
Can I use a poly tank?+
Not for an above-ground dedicated fire-fighting supply. PBP 2019 calls for above-ground tanks to be concrete or metal. Underground tanks are another option.
How Highlands Tank Pros works
Highlands Tank Pros is a local lead-matching service connecting Southern Highlands property owners with independent, licensed plumbers and rainwater tank installers. When you call or send a request, we pass your details to a local installer who contacts you to quote. The installer you’re matched with is responsible for the work, its pricing and any warranties.