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BS EN 997:2018 pdf free

BS EN 997:2018 pdf free.WC pans and wC suites with integral trap.
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
EN 1717, Protection against pollution of potable water in water installations and general requirements of devices to prevent pollution by backflow
EN 12056-2, Gravity drainage systems inside buildings- Part 2: Sanitaiy pipework layout and calculation
EN 14124, Inlet valves forfiushing cisterns with internal overflow
AS 1172-1, Waterclosets(WC)-Pans
BS 1212-2:1990, Float operated valves. Specification for diaphragm type float operated valves (copper alloy body) (excluding floats)
BS 1212-3:1990, Float operated valves. Specification for diaphragm type float operated valves (plastics bodied) for cold water services only (excluding floats)
BS 1212-4:2016, Float operated valves. Specification for compact type float operated valves for WC flushing cisterns (including floats)
3 Terms and definitions
For the purposes of this document, the following terms and deli nitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
4 Classification
WC pans and suites are classified as described below:
Type 1: WC pans and suites designed for use with and tested using a nominal full flush volume of either 4 1, 5 I, 6 I, 7 1 or 9 I and in case of a reduced flush not less than those in accordance with Table 2 and Table 3. The requirements of type 1 are given in Clause 5.
Type 2: WC suites designed for use with a pressure flushing valve or a flushing cistern
incorporating some other flushing device, and tested as described in Clause 6, using a
maximum flushing volume of 6 1, or a dual-flush combining a maximum flush of 6 1 and a
reduced flush not greater than two-thirds of the maximum flush volume. The
requirements of type 2 are given in Clause 6.
5 Functional characteristics and test methods for type 1 products
5.1 Depth of water seal
When tested in accordance with 5.7.1, the depth of the water seal shall be not less than 50 mm.
5.2 Flushing characteristics
5.2.1 General
Table 1 correlates the flushing characteristics to the WC pan sub-type and flushing volume.BS EN 997 pdf free download.

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