What is the right way to interlink cisterns and stay compliant
When it comes to linking cold water storage cisterns, the rules are clear, avoid it if possible. That said, having twin or divided tanks is commonplace in the industry, so when it’s unavoidable, WRAS guidance and Water Regs UK outline specific requirements to protect water quality and safety.
One key requirement? Use a delayed action float valve.
Why? Because delayed action float valves help ensure full water turnover, prevent stagnation, and keep stored water wholesome – exactly what the regulations demand.
That’s where Keraflo Delayed Action Float Valves come in.
✅ Fully WRAS-approved
✅ Designed for optimum turnover in linked tanks
✅ Built to last with robust, corrosion-resistant materials
✅ Proven compliance with Water Fittings Regulations
Access the datasheets here: www.hurlstoneassociates.co.uk/manufacturer/keraflo/
In summary:
If tanks must be interlinked:
- Keep storage volume to a minimum
- Connect cisterns in parallel
- Ensure inlets/outlets are at opposite ends
- Create flow through every cistern during demand
- Fit Keraflo delayed action float valves
Read the Water Regs UK Guidance – Click Here
Need help specifying the right solution? Contact Hurlstone Associates today and we’ll help you achieve compliance with confidence.
Neil Weston and Team
Hurlstone Associates