BS 14055:2010 pdf download – WC and urinal flushing cisterns

BS 14055:2010 pdf download – WC and urinal flushing cisterns 1 scope This European Standard specifies design, performance requirements and the test methods for WC and urinalflushing cisterns with flushing mechanism, inlet valve and overflow. This document covers flushing cisterns designed to be connected to drinking water installations insidebuildings. This standard does not cover automatic valveless siphon flushing cisterns for flushing urinals.NOTE Flushing cisterns for one-piece WCs and close-coupled suites are covered by EN 997. 2 Normative references The following referenced documents are indispensable for the application of this document.For datedreferences,only the edition cited applies. For undated references,the latest edition of the referenceddocument (including any amendments) applies. EN 997:2003,WC pans and wC suites with integral trap EN 1717，Protection against pollution of potable water in water installations and general requirements ofdevices to prevent pollution by backflow EN 13407:2006, Wall-hung urinals — Functional requirements and test methodsEN 14124,Inlet valves for flushing cisterns with internal overflow BS 1212-2:1990, Float operated valves — Specification for diaphragm type float operated valves (copper alloybody)(excluding floats) BS 1212-3:1990，Float operated valves — Specification for diaphragm type float operated valves(plasticsbodied) for cold water services only (excluding floats) BS 1212-4:1991，Float operated valves — Specification for compact type float operated valves for wcflushing cisterns (including floats) 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 valve-type flushing cistern cistern with integral valve outlet device, for storage and discharge of a defined volume of flushing water forremoval of excrement from a wC pan 3.2 valveless-type flushing cistern cistern with integral syphonic actuated outlet device, for storage and discharge of a defined volume of flushingwater for removal of excrement from a wC pan NOTE Both types of flushing cisterns are available, as detailed below: 3.3 close-coupled multiple use flushing cistern close-coupled flushing cistern for use with different WC pans 3.4 independent flushing cistern flushing cistern mounted separately from a WC pan or urinal 3.5 outlet valve mechanism for opening and closing the outlet orifice of the flushing cistern 3.6 operating mechanism mechanism to open, and if applicable, close the outlet valve 3.7 flush pipe connecting pipe between a flushing cistern’s outlet and a WC’s or urinal’s inlet 3.8 overflow device enabling release of excess water from a flushing cistern when water reaches a pre-determined level 3.9 inlet valve valve that controls and shuts off the flow of water into a flushing cistern 3.10 overflow level...