From Waste Streams June/July 2006
http://www.wastestreams.com.au/
Action talks' underwater tank design has a 152mm hole as it's largest entry point whereas the average tank on the market has an inspection hole of 400mm. The tank was designed to prevent drowning in the tank after an 11-month evaluation of every underground rainwater tank in Australia. The above-ground tanks are also drown-proofed with a strainer screwed in place, and under that is an internal flush diverter. If a child manages to kick a hole in the strainer, access to water is barred by the diverter.
