Sydney's Septic & Water Tank Installation Specialists Whether you're building on a property without mains sewer access or want to harvest rainwater to cut your water bills, Optimised Plumbing Services designs and installs septic systems and water tanks across Sydney, the Blue Mountains and Hawkesbury.
Our licensed plumbers handle everything — excavation, installation, pump systems and ongoing servicing.
Septic Tank Services We Provide ✓ New septic tank installation (concrete & poly systems) ✓ Aerated wastewater treatment systems (AWTS) ✓ Septic tank replacement & upgrades ✓ Absorption trenches & transpiration beds ✓ Septic pump-out coordination & system repairs ✓ Lifetime workmanship guarantee on every install Water Tank Installation Services ✓ Rainwater tank supply & installation (poly, steel & slimline) ✓ Underground & above-ground tank systems ✓ Pump installation & pressure systems ✓ Tank-to-toilet & laundry plumbing connections ✓ First-flush diverters, filters & leaf guards ✓ BASIX compliance for new builds & renovations Recent Septic & Water Tank Projects Real photos from our recent septic and water tank installations across Sydney, the Hawkesbury and surrounds — from excavation and site preparation through to tank delivery, crane placement and final install.
Why Choose Us for Tank Installations? 15+ Years Installation Experience 100% Licensed & Insured Fixed Price Upfront Quotes.