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Greywater Recycling System Certificate

A Greywater Recycling System Certificate confirms that a greywater treatment and reuse system has been installed in compliance with BS 8525 and the Water Supply (Water Fittings) Regulations. It covers the treatment process, water quality testing, pipework marking, and system commissioning.

BS 8525-1:2010 (Greywater systems), Water Supply (Water Fittings) Regulations 1999Valid: One-off (annual service recommended)

What it covers

  • System type (diversion, short retention, biological)
  • Treatment process and capacity
  • Water quality testing (pH, turbidity)
  • Backflow prevention and air gaps
  • Pipework marking (non-potable)
  • Alarm and bypass systems

Who needs a Greywater Recycling?

Commercial building developers
Eco-home builders
Architects (BREEAM credits)
Facilities managers

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Frequently asked questions about Greywater Recycling

What is greywater?
Greywater is wastewater from baths, showers, washbasins, and washing machines. It does not include water from toilets (blackwater) or kitchen sinks (which contain fats and food waste). Treated greywater can be reused for toilet flushing and garden irrigation.
What standard covers greywater systems?
BS 8525-1:2010 covers the design, installation, and maintenance of greywater systems. The Water Supply (Water Fittings) Regulations also apply to prevent backflow into the mains supply.

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