Wat03 Water efficient equipment: urinals – Above Green

(4 credits available)

Aim

To reduce water consumption by encouraging the specification of water efficient urinals.

Question

Does the asset contain low water use or waterless urinals?

Credits	Answer	Select a single answer
0	A	Question not answered
0	B	No
1	C	All urinals ≤3 litres per flush
2	D	All urinals ≤1.2 litres per flush
3	E	Waterless urinals

Assessment criteria

Criterion	Assessment criteria	Applicable answer
1	Filtering Where no urinals are present in the asset and no urinals from nearby facilities (e.g. adjacent building) will be used by the occupants and visitors, this issue can be filtered out. Also see Specific Note below.	All
2	Where multiple fittings are specified with various flow rates, the flow rates for each type of fitting will need to be calculated and the average flow rate determined by the Assessor.	C-E
3	Water consumption figures will need to be derived from the manufacturer’s product information to determine the consumption of the urinals as follows: Urinals: Flush volume in litres/use for single use flush urinals. Cistern fed systems: The flushing frequency/hour and cistern capacity in litres.	C,D
4	If manufacturer information is unavailable it should be possible to tell whether urinals are waterless. However, if this is the case, the Assessor should provide the manufacturer name and model number with photographic evidence in the Assessor comments section of the assessment.	E
5	Where urinal troughs have been installed, their compliance with this issue can be assessed through the calculation outlined in the Methodology section.	C-E

Specific notes

Asset type specific

Where the asset under assessment contains no water using equipment and therefore there is no water supply to the building, identify and assess the water supply to the facilities most likely to be used by the occupants and visitors to the asset under assessment.

This rule also applies where the assessment consists solely of an extension to an existing building, i.e. where the extended building contains no new water using equipment because there are facilities present within the existing building.

Methodology

Urinal troughs

Each 600mm length should be counted as 1 urinal for the purposes of calculating the correct flush volume, i.e. the total flush volume for the whole trough should be considered per 600mm length to provide comparable figures to establish whether the installed fixture is compliant with this issue.

For example, a trough which is 1800mm in length and has a flush of 9 litres could be calculated:

600𝑚𝑚 / 1800𝑚𝑚 𝑥 9 𝑙𝑖𝑡𝑟𝑒𝑠 = 3 𝑙𝑖𝑡𝑟𝑒𝑠 𝑝𝑒𝑟 600𝑚𝑚

Therefore, in this example the urinal trough would be classed as compliant and answer option C should be selected.

Assessor checks

An adequate proportion of urinals within the asset need to be checked to determine whether they are low flush / waterless, although it is not necessary to check them all. At least 10% of urinals within the building must be observed.

Evidence

Criteria	Evidence requirements
-	The evidence below is not exhaustive, please also refer to the ‘BREEAM evidential requirements’ section in the scope of the Guidance for appropriate evidence types which can be used to demonstrate compliance.
All	Copies of asset floor plans and/or an inventory of sanitary elements indicating the location and quantity of urinals highlighting which urinals are waterless.
2-5	Photographic evidence of installed urinals; a representative sample is sufficient.
2-5	Manufacturer/supplier literature of installed urinals (if available) or on-site measures.
5	Where urinal troughs are present calculations as outlined in the Methodology section should be provided.