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Example Specifications

The example specifications below have been put together considering cost, the performance and availability of relevant fittings and appliances and the end-user attitudes to these fittings. The Water Efficient Product Labeling Scheme is a comprehensive and extensive database of water efficient products and is a good place to start looking for products for a water-efficient home.

Strategies for meeting water consumption targets can be broadly divided into fittings-based and recycling-based strategies. Fittings-based strategies rely on smart specification of efficient fittings and may add to the cost of a new home, but how much will largely depend on which fittings are chosen (CLG estimates £125 for a home meeting CSH Level 3 or 4). Recycling-based strategies can be used in combination with efficient fittings to achieve challenging water consumption target of Code Levels 5 and 6.

Here are several example specifications, using different strategies to meet Code level 3 and above:

Scenario 1

Scenario 2

Scenario 3

Scenario 4

Scenario 5

Scenario 6

Strategy, Code level

Scenario 1 Fittings-based, Code level 3/4

Scenario 2 Fittings-based, Code level 3/4

Scenario 3 Fittings-based, Code level 3/4

Scenario 4 Fittings-based, Code level 3/4

Scenario 5 Fittings-based, Code level 5/6

Scenario 6 Recycling-based, Code level 5/6

WC

Scenario 1 4 (single flush)

Scenario 2 4/2.6 (dual flush)

Scenario 3 5/3 (dual flush)

Scenario 4 6/4 (dual-flush toilet)

Scenario 5 4/2.6 (dual flush)

Scenario 6 6 (supplied by greywater)

Taps (excluding kitchen taps)

Scenario 1 4

Scenario 2 5

Scenario 3 4

Scenario 4 4

Scenario 5 1.6

Scenario 6 3

Bath

Scenario 1 180

Scenario 2 155

Scenario 3 180

Scenario 4 180

Scenario 5 155

Scenario 6 155

Shower

Scenario 1 8

Scenario 2 8

Scenario 3 8

Scenario 4 8

Scenario 5 6

Scenario 6 7

Kitchen sink taps

Scenario 1 6

Scenario 2 8

Scenario 3 6

Scenario 4 6

Scenario 5 3

Scenario 6 4

Washing machine

Scenario 1 8.17 (not supplied)

Scenario 2 8.17 (not supplied)

Scenario 3 8.17 (not supplied)

Scenario 4 6.14 (supplied)

Scenario 5 6.14

Scenario 6 8.17 (not supplied)

Dishwasher

Scenario 1 1.25 (not supplied)

Scenario 2 1.25 (not supplied)

Scenario 3 1.25 (not supplied)

Scenario 4 1.25 (not supplied)

Scenario 5 0.67

Scenario 6 1.25 (not supplied)

Water Recycling

Scenario 1 0 (not supplied)

Scenario 2 0 (not supplied)

Scenario 3 0 (not supplied)

Scenario 4 0 (not supplied)

Scenario 5 0 (not supplied)

Scenario 6 26.52 (greywater supplying toilet)

Predicted per capita consumption (Code)

Scenario 1 104.65

Scenario 2 99.81

Scenario 3 103.28

Scenario 4 103.43

Scenario 5 79.99

Scenario 6 79.84