Polyethylene Sewage/waste water tank compliant with ISO8099 standard. Complete with 10-hole inspection hatch with 3 1"1/2 threaded connections, one 1/2" threaded connection, dip tube, plug and two 38 mm swivel connections with 1"1/2 ring nut. Compatible for sensor assembly VDO type level with 5 holes and drain pump with hole spacing 60 x 85 mm.