Utilising The Martins Group’s concrete manufacturing expertise, Sydney Water Tank (SWT) Concrete Pits and Grates produce a range of engineer designed concrete pits. All concrete products are manufactured at our own purpose-built precast concrete factory in Smeaton Grange. SWT Concrete Pits and Grates are suitable for a wide range of applications including stormwater, inspection, junction, … Continue reading SWT Concrete Pits and Grates