Homestar Technical Clarification Rulings
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| Technical Question Title | Tool Version | Date Released | Credit Name | Tool Category | TC Link |
|---|---|---|---|---|---|
| TQ161 Bath capacity to overflow | v4.1 | August 2022 | WAT | Link | |
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Approved Ruling: In both v4 (WAT-1) and v5 (EF3) of Homestar, NZGBC advises that the capacity of any bath installed to be reported as ‘the capacity to overflow’. It is common for baths in New Zealand to be installed without an overflow (since the plumbing regulations require a floor waste anyway). As such bath capacities are often reported in product literature as the ‘working volume’ which is 50mm from the lip of the bath, rather than 50mm from the overflow where one is present. The equivalent ‘capacity to overflow’ of baths without overflows can be assumed to be 80% of the working volume and this figure can be used in the Homestar water calculators. |
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