Uisce Éireann Regulations
BEST PRACTICE FOR WATER INFRASTRUCTURE
Ref: Uisce Éireann Regulations for Booster Units (CDS-5020-03)
3.28 Water Storage
Only indirect plumbing systems should be provided in internal water distributions systems i.e. all appliances shall be plumbed from a cold-water storage tank and supplied by gravity. The benefits of such indirect systems relate to ensuring that adequate storage capacity is available to serve all appliances within the Premises.
The plumbing and water storage requirements for premises should be in accordance with the current version of the Building Regulations and/or with the requirements of the relevant Local Authority’s Plumbing Regulations and Bye-Laws, if such exist. In many instances, the Local Authority will require arrangements to be made to have internal plumbing inspected and approved by a Local Authority representative.
All Developments over two storeys in height or requiring a supply pressure greater than 15m head at the Curtilage of the property must comply with the requirements of Section 3.13 above. Specific agreement will be required from Uisce Éireann and the relevant Local Authority as necessary.
As a general rule, storage of 24-hour maximum daily consumption should be provided. The minimum water storage requirement for commercial, industrial or manufacturing purposes shall be calculated on a 24-hour or maximum daily consumption basis. General guidelines for domestic premises are shown below in the following Table.
TANK SIZING GUIDE
Ref: Uisce Éireann Regulations for Booster Units (CDS-5020-03)
| Minimum cold water storage for new developments using low flush & dual flush WCs | |
|---|---|
| Dwelling house or apt. (up to 3 bed without power shower) | 227L |
| Dwelling house or apt. (4 bed or single power shower) | 340L |
| Dwelling house or apt. (having 2 full bathrooms) | 682L |
| Additional water storage per shower en-suite in the above | 90L |
*Please note: dishwashers, washing machines and other water using devices are included in the regulation, please ensure that appliance pressure and flow rates are as per manufacturer’s requirements.
