The Fittings Regulations make a number of significant, phased changes to WC suites. These are best explained with reference to the timetable for introducing the developments:

From July 1999 to December 2000

• Maximum flush volume remains at seven and a half litres.
• WC flushing by siphonic mechanism only. Relaxations of this requirement to permit the installation of non-siphonic mechanisms in non-domestic premises are available if certain criteria are met. Please contact us for details.
• Dual flush cisterns permitted, but only with a siphonic mechanism.

From January 2001

• Mandatory reduction in flush volume to six litres for all newly installed suites.
• Introduction of a high performance specification to cover the entire WC suite, to include endurance testing for the siphonic & non-siphonic mechanisms & improved tests for the effectiveness of the flush. The specification will ensure that sanitary ware continues to satisfy consumer expectations while also improving its water efficiency.
• Dual flush cisterns permitted for any mechanism & suite passing the performance specification.
• Existing WC flushing devices can be replace with non-siphonic devices provided the unit flushes the same volume as the cistern already in use.