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1、BRITISH STANDARD BS 7358:1990 Specification for Close coupled suites with flush capacity of 7.5 L maximum Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 14:49:47 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7358:1990 This British Standard, having been prepared
2、 under the direction of the Building Services Standards Policy Committee, was published under the authority of the Board of BSI and comes into effect on 31 August 1990 BSI 08-1999 The following BSI references relate to the work on this standard: Committee reference SEB/1 Draft for comment 88/14139 D
3、C ISBN 0 580 18911 2 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Building Services Standards Policy Committee (SEB/-) to Technical Committee SEB/1, upon which the following bodies were represented: British Bathroom Council British Pl
4、astics Federation Clay Pipe Development Association Ltd. Consumer Policy Committee of BSI Department of Health Department of the Environment (Building Research Establishment) Department of the Environment for Northern Ireland Department of the Environment (Property Services Agency) Institute of Cler
5、ks of Works of Great Britain Inc. Institute of Plumbing Institute of Vitreous Enamellers Institution of Environmental Health Officers Institution of Water and Environmental Management Metal Sink Manufacturers Association Royal Institute of British Architects Vitreous Enamel Development Council Water
6、 Services Association of England and Wales Amendments issued since publication Amd. No.DateComments Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 14:49:47 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7358:1990 BSI 08-1999i Contents Page Committees responsible
7、Inside front cover Forewordii Section 1. General 1Scope1 2Definitions1 3Marking1 Section 2. Materials, design and construction 4Suites2 5WC pans2 6Cisterns (shells and covers)2 7Seats2 Section 3. Performance 8Flushing tests4 9Volume of discharge per flush4 Appendix A Flushing tests5 Appendix B Volum
8、e of discharge test6 Appendix C Bibliography of associated standards6 Figure 1 Dimensions2 Table 1 Functional dimensions (other than connecting dimensions)3 Publication(s) referred toInside back cover Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 14:49:47 GMT+
9、00:00 2006, Uncontrolled Copy, (c) BSI BS 7358:1990 ii BSI 08-1999 Foreword BS 7358 has been prepared under the direction of the Building Services Standards Policy Committee in order to supplement a series of new British Standards for WC pans and cisterns designed to accommodate a 7.5 L flushing cap
10、acity. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document com
11、prises a front cover, an inside front cover, pages i and ii, pages 1 to 6, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: Lond
12、on South Bank University, London South Bank University, Fri Dec 08 14:49:47 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7358:1990 BSI 08-19991 Section 1. General 1 Scope BS 7358 specifies requirements for material, quality, functional and connecting dimensions, performance and design for close cou
13、pled or integrally cast pedestal washdown WC suites with horizontal outlet, having a flush capacity of 7.5 L max. and supplied with the appropriate seat, cover, siphon and float operated valve. Float operated valves and methods of fixing suites do not form part of this standard. NOTEThe titles of th
14、e publications referred to in this standard are listed on the inside back cover. 2 Definitions For the purposes of this British Standard the following definitions apply. 2.1 spill-over level the level at which water in the flushing cistern will first spill over if the rate of inflow exceeds the rate
15、 of outflow through the warning pipe 2.2 water line a level marked inside a cistern to indicate the highest water level at which the float operated valve is adjusted to shut off 2.3 flushing rim device around the top of the pan designed to direct and disperse the water around the bowl during the flu
16、sh 3 Marking 3.1 The suite shall be permanently marked with the following information: a) the manufacturers name or identification mark; b) the manufacturers model reference; c) the number of this British Standard, i.e. BS 73581). 3.2 Marking shall be capable of being seen after installation. NOTEFo
17、r the purposes of this standard marking by means of a label complying with BS 4781-1 is considered to be an acceptable permanent method of marking. 3.3 Any component of the suite supplied separately, not as an integral part of the suite, shall be marked with the manufacturers model reference. 1) Mar
18、king BS 7358 on or in relation to a product represents a manufacturers declaration of conformity, i.e. a claim by or on behalf of the manufacturer that the product meets the requirements of the standard. The accuracy of the claim is therefore solely the responsibility of the person making the claim.
19、 Such a declaration is not to be confused with third party certification of conformity, which may also be desirable. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 14:49:47 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7358:1990 2 BSI 08-1999 Section 2. Materia
20、ls, design and construction 4 Suites A WC suite shall be either: a) an integrally cast pan and cistern having a compatible seat and cover; or b) a separately cast pan and cistern with a system of coupling having a compatible seat and cover. Both types shall comply with the dimensions and tolerances
21、given in Table 1. See Figure 1. NOTEThe interior and exterior configuration of the suite should be designed so that any ridges, crevices, or grooves are kept to a minimum to facilitate routine cleaning after installation. 5 WC pans The WC pan component of a close coupled suite shall be manufactured
22、from vitreous china complying with BS 3402. 6 Cisterns (shells and covers) The cistern component of a close coupled suite shall comply with the material, design and construction requirements for vitreous china and plastics close coupled cisterns specified in BS 7357 with the exception of the volume
23、of discharge and rate of discharge requirements. 7 Seats The seat component of a close coupled suite shall be manufactured from plastics or other materials and shall, with the exception of dimensions, exhibit the characteristics for WC seats specified in BS 12542), including the hygienic shape requi
24、rements. The inside edge of the seat shall overhang the inside bottom edge of the flushing rim by 5 mm min. The seat when in the raised position shall not fall forward when installed in accordance with the manufacturers instructions. 2) BS 1254 is in the process of revision to include seats of mater
25、ials other than plastics. Figure 1 Dimensions Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 14:49:47 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7358:1990 BSI 08-19993 Table 1 Functional dimensions (other than connecting dimensions) Ref.DescriptionsDimension
26、s AHeight, base to top of seat (not including the cover) measured at the front mm 420 15 BaDistance between a vertical line from the water level on the back plate to the inside face of the flushing rim at back 65 max. CDepth of water seal50 min. RClearance below tip of back plate65 min. d2External d
27、iameter of outlet102 5 kDiameter of the free space around the outlet150 min. iLength of straight part of outlet glazed and without grooves40 min. qDistance from end of outlet to furthest projection of suite towards wall not integrally cast 150 15 integrally cast 240 45 tHeight of centre line of outl
28、et from base190 5 VDepth of flushing rim if provided95 max. XOverall length front to back800 max. a For the purposes of measuring WC pans, other than open or box rims, mark a datum level around the inside of the bowl 85 mm from the top surface of the pan. Licensed Copy: London South Bank University,
29、 London South Bank University, Fri Dec 08 14:49:47 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7358:1990 4 BSI 08-1999 Section 3. Performance 8 Flushing tests When tested in accordance with Appendix A the pan of the suite shall meet the following requirements. a) Paper and ball tests. The trap sha
30、ll be completely cleared in four out of five operations. b) Sawdust test. The total unflushed area between the water surface and the underside of the rim, or for rimless pans between the water surface and up to a distance of 85 mm from the top surface of the bowl, shall be not more than 5 000 mm2. 9
31、 Volume of discharge per flush When tested in accordance with Appendix B, the cistern of the suite shall discharge a volume not more than 7.5 litres. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 14:49:47 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7358:1990
32、 BSI 08-19995 Appendix A Flushing test A.1 Test apparatus A.1.1 A suite to be tested complete with all its fittings connected in accordance with the manufacturers instructions, placed on a firm flat horizontal surface with its outlet discharging freely into the air with no obstruction within a dista
33、nce of 150 mm of the pan outlet measured in the direction of the axis of the outlet. A.1.2 Water supply at a temperature of between 7 C and 20 C controlled by a stop valve and fitted, if necessary, with a pressure regulating valve to give a static pressure of 3 0.5 bar3) at the inlet to the cistern
34、float operated valve, with the float operated valve adjusted to close when the water level reaches the marked water line of the cistern. A.1.3 Soft paper for flushing tests (see A.2). A.1.4 A ball, of non-absorbent material, having a relative density of between 1.075 and 1.080 and a diameter of 43 0
35、.5 mm. A.1.5 Fine dry sawdust, passing a 2 mm mesh. A.2 Specification for soft paper for flushing tests NOTEThis specification is intended to standardize the paper used in the test. It is not intended as a specification for toilet paper for ordinary use. A.2.1 Specification A.2.2 Apparatus for baske
36、t method A.2.2.1 Basket, 75 mm long, 50 mm in diameter and made of 0.75 mm wire. The basket is made of 2 “U” shaped pieces measuring 50 mm 75 mm, joined to form a cross of 50 mm 50 mm in the lower part and two circles 50 mm in diameter spaced 50 mm and 75 mm respectively from the bottom, joined on a
37、ll four sides. The basket is tared to a mass of 3 g. A.2.2.2 Water, from the same source as that which is to be used for the flush test at a temperature within 2 C of that recorded in A.3.1. A.2.3 Basket method for absorbency of paper Roll up 12 sheets of paper and place them into the basket. Place
38、the inverted basket containing the paper into a cylindrical glass vessel containing water. Measure the time taken for the paper to become saturated from placing it in the water to starting to sink. Repeat this test three times and record the average time taken. A.3 Preparation A.3.1 Fill the cistern
39、 and record the temperature of the water. A.3.2 Flush the cistern in order to ensure that the trap is fully charged with water to the normal working level. A.3.3 Allow the cistern to refill and close the stop valve, ensuring that no water enters the cistern during the test. A.4 Methods and results A
40、.4.1 Paper test For each flush operation drop 12 separate sheets of paper as specified in A.1.3, loosely crumpled, individually, into the WC pan and flush the cistern within 20 s of the start of the operation. Repeat the procedure five times ensuring the trap is completely cleared before each new fl
41、ush operation. A.4.2 Result Record whether or not any paper remains in the trap at the end of each flush operation. A.4.3 Ball test For each flush operation place the ball into the WC pan to be tested and then flush the pan. Repeat the procedure five times ensuring the trap is cleared before each ne
42、w flush operation. A.4.4 Result Record whether or not the trap has been cleared of the ball at the end of each flush operation. 3) 1 bar = 105N/m2= 105Pa. TypeSoft tissue. Sheet countIf the tissue comes from a roll or packet in twin-ply form then a twin-ply sheet shall be counted as one sheet. Sheet
43、 areaSheet area shall be between 14 000 mm2 and 16 000 mm2. Grammage12 sheets shall weigh between 6 g, and 8 g i.e. grammage of the paper shall be between 35 g/m2 and 42 g/m2. AbsorbencyThe absorbency of the paper is measured using the basket method and shall fall within the range 10 s to 60 s. Lice
44、nsed Copy: London South Bank University, London South Bank University, Fri Dec 08 14:49:47 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7358:1990 6 BSI 08-1999 A.4.5 Sawdust test Flush the WC pan and immediately sprinkle approximately 20 g of fine dry sawdust on the inside of the pan between the no
45、rmal water level and the flushing rim (if provided) or, for rimless pans up to a distance of 85 mm from the top surface of the bowl, as completely and evenly as possible. Allow the cistern to refill and flush the pan again. A.4.6 Result Record the area of any unflushed sawdust. Appendix B Volume of
46、discharge test B.1 Preparation Set up the suite as in Appendix A. B.2 Method Fill the cistern and operate the flushing mechanism so that the WC pan sump is left primed at its normal working level. Allow the cistern to refill to the marked water level. Place a vessel under the open end of the horizon
47、tal outlet of the pan. Ensure that the water supply stop valve is closed, to prevent water entering the cistern during the test. Operate the flushing mechanism. B.3 Result On completion of the flush, determine and record either by measuring or weighing, the volume of water discharge. Appendix C Bibl
48、iography of associated standards BS 4118, Glossary of sanitation terms. BS 5503, Vitreous china washdown WC pans with horizontal outlet Part 3: Specification for WC pans with horizontal outlet for use with 7.5 L maximum flush capacity cisterns. BS 5504, Wall hung WC pans Part 4: Specification for wa
49、ll hung WC pans for use with 7.5 L maximum flush capacity cisterns. BS 5627, Specification for plastics connectors for use with horizontal outlet vitreous china WC pans. BS 6465, Sanitary installations. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 14:49:47 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7358:1990 BSI 08-1999 Publication(s) referred to BS 1254, Specification for WC seats (plastics). BS 3402, Specification for quality of vitreous china sanitary appliances. BS 4781, Specification
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