Block Fill / Retaining Walls 7mm aggregate concrete mix can be pumped by our line pump to core fill all types of block walls/block columns.It is easy with a line pump to reach block walls and easily manipulate the hose to fill concrete in the blocks.We cover both residential and small-scale commercial block filling across Auckland. Simply call us to get a quote today. BOOK NOW Our Pumping Services Driveways / Patios Slabs / Foundations Footings