All Dam Buster rain heads are engineered around maximum flow rates, not dimensions.
All Dam Buster rain heads have a certified overflow capacity of at least 16 litres per second, but down pipe sizes and configurations will vary and also need to be taken into account when determining normal flow rates and suitability for each installation.
Dam Buster rain heads fully meet requirements of the National Construction Code, including AS/NZS3500.3 and are 100% Australian made. You can select, buy and install with confidence and no Performance Solution is required.
Please use the table on the right to determine the correct Dam Buster for your job based on the flow rate and what size box gutter and down pipe you want to use; also see the design guide below.
In general, 200mm and 300mm Dam Buster models (with matching box gutters and appropriate sized down pipes) are more than adequate for even a large domestic house with the 400mm, 500mm and 600mm models more suitable for commercial applications.
NOTE: We don't make custom designs or custom sizes except for Architects and Designers who want to incorporate the innovative Dam Buster features into a unique feature piece of rain head art for equally unique buildings.
Choosing the right size box gutter to suit your Dam Buster is also extremely important; box gutters must be correctly sized according to AS/NZS3500.3. Don't forget that bigger is not necessarily better a
3.and bigger also costs a lot more to build. If you are not sure, speak to your Hydraulic Engineer for more information about correct box gutter sizing.
Engineer test certificates with more technical information on the Dam Buster rain head range can be downloaded on the bottom right of this page.
If for any reason you still need help with correct product selection, please get in touch with our technical gurus via the Contact & Warranty page or else direct by email to firstname.lastname@example.org.
If you are in the design phase for your new home or project, working with your Architect or Designer we can also provide a fee based service to ensure your roof plumbing installation will be fully compliant.
Phone inquiries can be made to Russell on 0409 716974 in normal business hours for Victoria.
Watch the video to see how easy and quick it is to install a Dam Buster rain head.
NOTE: All Dam Buster products need to be installed by an appropriately licenced person such as a Roof Plumber. Check your local regulations if unsure.