Building Regulations (Northern Ireland) 2000

Unvented hot water storage systems

P5—(1) This regulation shall apply to any hot water storage system (other than a system or part of a system used solely for space heating or an industrial process) that has a storage vessel which—

(a)has a capacity greater than 15 litres; and

(b)does not incorporate a vent pipe to the atmosphere.

(2) A hot water storage system to which this regulation applies, whether heated directly or indirectly, shall incorporate—

(a)safety devices to ensure that the temperature of the stored water does not exceed 100°C at any time; and

(b)devices to control the working pressure and to relieve excessive pressure.

(3) Any discharge from devices provided for the purpose of paragraph (2) shall be conveyed safely to where it can be seen readily and will cause no danger to people.