Description 600mm Extension Sleeve for the F-Line Shallow Dig Tank. The extension sleeve sits directly onto the F-Line Shallow Dig Tank body and then the chosen shaft sits on top. The location of the shaft can be adjusted up and down the sleeve to ensure the best possible level to match the ground level. The extension sleeve can also be cut down. 1. PE shaft extensions fitting all tanks 2. Extends the entry shaft to enable deeper installation of the tank 3. Runoff-grooves avoid the problem of surface water getting into the tank 4. Stepless height adjustment thanks to repositioning of the entry dome or simple sawing to fit 5. Seal included 6. Height 600 mm, Ø 600 mm
