GRAF Australia

Project assistance

Design tools

Interactive calculators to size rainwater storage, stormwater detention and pump systems - built on the same engineering logic our team uses in the field.

Rainwater tank sizer

Coming soon

Calculate storage volume from roof catchment, rainfall and demand.

Stormwater detention calculator

Coming soon

Size EcoBloc detention volume for your site and council requirements.

Pump station selector

Coming soon

Match pump duty to tank volume, head and flow requirements.

Pipe friction loss

Coming soon

Estimate head loss through pipe runs for system design.

Working calculator prototypes exist in the project archive - they'll be ported into this hub next. Need sizing now? Request a quote and our team will size your system.

Ready to size your system?

Tell us about your site and water needs - we'll recommend the right products and configuration.

Request a quote