Rainwater tank guide for Sydney homeowners.
Benefits: reduced water bills by 40-60 percent, drought resilience with exemption from water restrictions, reduced stormwater runoff, government rebates.
Tank types: polyethylene $300-$2,500, slimline $400-$1,500, underground $2,000-$8,000, steel colorbond $1,000-$5,000, bladder tanks $800-$2,500.
Sizing: garden only 2,000-3,000L, garden plus toilets 3,000-5,000L, garden toilets and laundry 5,000-10,000L.
Installation requires licensed plumber for connections, first-flush diverter, pump, backflow prevention, and mosquito proofing.
Maintenance every 3 months clean filters and screens..