BREEAM Wat 04 — Water Efficient Equipment
How BREEAM Wat 04 (water efficient equipment) is assessed, the evidence your assessor needs and how to secure the credits early. Fixed-fee UK assessors, same-da
BREEAM Wat 04: water efficient equipment
Wat 04 rewards reducing unregulated water demand, such as irrigation, vehicle washing and process uses, through efficient systems or by designing the demand out.
Get a fixed-fee quote or book a call with an assessor. We reply the same working day with the scheme, timeline and fee for your project.
What Wat 04 assesses and the evidence needed
| Requirement | Typical evidence |
|---|---|
| Identify unregulated water uses | Design-stage list of water-using equipment |
| Low-water landscaping or efficient irrigation | Landscape specification |
| Water recycling for washing or process uses | System specification and design note |
Exact criteria and credit numbers depend on the scheme and manual version your project is registered under. Your assessor confirms them at pre-assessment.
How to secure Wat 04 without extra cost
- Agree the target at pre-assessment, before RIBA Stage 2.
- Give the responsible designer or contractor a clear evidence list.
- Check the evidence at design stage so nothing is lost at post-construction review.
Related guides
Frequently Asked Questions
What is BREEAM Wat 04?
The water efficient equipment credit, covering water uses not handled by sanitary fittings, such as irrigation and vehicle washing.
Can a building with no irrigation achieve Wat 04?
Often yes, where the design shows there is no significant unregulated demand or that it has been designed out. Your assessor confirms this against the current manual.
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