Water efficiency
Part G water calculations
Coordinate your water-use specification before the fittings are ordered and installed.
What this service helps you do.
Ordellis calculates the predicted water consumption of the proposed dwelling using the agreed assessment method and the specified sanitary fittings and appliances. The calculation brings taps, showers, baths, toilets and relevant appliances into one documented assessment, helping the project team review the specification against the applicable water efficiency target.
What’s included.
- Confirmation of the applicable assessment method and project water efficiency target.
- Review of the proposed sanitary fittings and relevant appliance water-use specifications.
- A water consumption calculation and report recording the inputs and results.
- Review of agreed product substitutions or specification changes within the quotation.
What we need to get started.
- Project location, dwelling plans and the relevant building control or planning brief.
- A schedule of taps, showers, baths, toilets and relevant appliances.
- Manufacturer flow rates, flush volumes, bath capacities and appliance water consumption data.
- Details of any proposed rainwater harvesting or greywater system included in the assessment.
Requirements and calculation routes vary by country and project. The applicable Part G or other water efficiency requirement and any planning target are confirmed before work starts. This is a specification-based calculation; it is not an on-site flow test.
Your questions, answered.
When should I request the water calculation?
During specification, before ordering fittings and appliances. Send the product schedule and manufacturer water-use data so changes can be considered early.
What if we change the taps, showers or toilets?
Different products can change the calculation. Send the revised flow rates, flush volumes or capacities so the report can be checked and updated within the agreed scope.
Connected expertise
Services that work together.
Tell us what you’re building.
Share your drawings and project location for a clear scope and quotation.
