Customer Support: +44 (0)203 327 3140

Login to i2i Subscription Intertek.com
  • There are no items in your cart
We noticed you’re not on the correct regional site. Switch to our AMERICAS site for the best experience.
Go to AMERICAS site
Dismiss alert
Please enter a keyword to search
Advanced search
Home
BSI
BS 2456:1990

BS 2456:1990

Current

Current

The latest, up-to-date edition.

Specification for floats (plastics) for float operated valves for cold water services

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

17-09-2001

Publisher

British Standards Institution

Committees responsible
Foreword
Specification
Section 1. General
1.1 Scope
1.2 Definitions
1.3 Marking
1.4 Colour coding
Section 2. Materials
2.1 Effect of materials on water quality
2.2 Plastics materials
2.3 Copper alloy for boss insert
Section 3. Design and construction
3.1 Lifting efforts
3.2 Bosses
Section 4. Test requirements
4.1 Leakage and hot water test
4.2 Deflection test
4.3 Impact test
4.4 Cold embrittlement test
4.5 Boss distortion test
Appendices
A. Information to be supplied by the purchaser
B. Calculation of lifting effort
C. Method of test for leakage and determination of
     resistance to hot water
D. Method of determining deflection
E. Method of determining resistance to cold embrittle-
     ment
F. Method of determining resistance of the boss to
     distortion
Tables
1. Minimum lifting efforts
2. Bosses
Figures
1. Deflection test rig
2. Example of test bolt

Requirements for two grades of plastic floats specified in BS 1212.

This British Standard specifies requirements for two grades of float, with or without boss inserts. Grade C for use in cold water cisterns only, where they may be exposed to temperatures not exceeding 38 °C. Grade H for use in cold water cisterns or systems that may subject the float to hot water not exceeding 93 °C for a limited period, e.g. from a vent pipe arrangement in a feed and expansion cistern. The standard specifies plastics spherical floats of 102 mm, 114 mm, 127 mm and 152 mm diameter, and non-spherical floats having equivalent lifting efforts, suitable for attachment to the float operated valves specified in BS 1212-1, BS 1212-2 and BS 1212-3, except when otherwise specified by the purchaser in accordance with Appendix A of this standard.

Appendix A lists the information to be provided by the purchaser at the time of enquiry or order.

NOTE The titles of the publications referred to in this standard are listed on the inside back cover.

Committee
B/504/-/8
DevelopmentNote
Supersedes 88/14194 DC, 96/105777 DC and BS 2456(1973) (10/2001) Reviewed and confirmed by BSI, October 2012. (09/2012)
DocumentType
Standard
Pages
18
PublisherName
British Standards Institution
Status
Current
Supersedes

BS 1212-1:1990 Float operated valves Specification for piston 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 7357:1990 Specification for 7.5 L WC flushing cisterns
BS 8558:2011 Guide to the design, installation, testing and maintenance of services supplying water for domestic use within buildings and their curtilages. Complementary guidance to BS EN 806
BS 1212-2:1990 Float operated valves Specification for diaphragm type float operated valves (copper alloy body) (excluding floats)
BS 5226:1991 Code of practice for equipment and procedures for the cleaning and disinfecting of milking machine installations
BS 1125:1987 Specification for WC flushing cisterns (including dual flush cisterns and flush pipes)
BS 5502-25:1991 Buildings and structures for agriculture Code of practice for design and installation of services and facilities
BS 8558:2015 Guide to the design, installation, testing and maintenance of services supplying water for domestic use within buildings and their curtilages. Complementary guidance to BS EN 806
BS 6700(2006) : 2006 DESIGN, INSTALLATION, TESTING AND MAINTENANCE OF SERVICES SUPPLYING WATER FOR DOMESTIC USE WITHIN BUILDINGS AND THEIR CURTILAGES - SPECIFICATION
BS 6700:1997 Specification for design, installation, testing and maintenance of services supplying water for domestic use within buildings and their curtilages
BS 3445-1:1992 Agricultural water troughs and water fittings Specification for water trough bodies, service boxes and water supply system

BS EN 12167:2011 Copper and copper alloys. Profiles and bars for general purposes
BS 1212-2:1990 Float operated valves Specification for diaphragm type float operated valves (copper alloy body) (excluding floats)
BS 7357:1990 Specification for 7.5 L WC flushing cisterns
BS EN 12163:2011 Copper and copper alloys. Rod for general purposes
BS EN 12164:2011 Copper and copper alloys. Rod for free machining purposes

View more information
£134.00
Excluding VAT
GBP
CAD
CHF
CNY
DKK
EUR
GBP
HKD
IDR
INR
JPY
KRW
MXN
NOK
NZD
SEK
SGD
USD
ZAR
Hardcopy - English
PDF - English
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50

Access your standards online with a subscription

Features

  • Simple online access to standards, technical information and regulations.

  • Critical updates of standards and customisable alerts and notifications.

  • Multi-user online standards collection: secure, flexible and cost effective.

Learn more on subscription solutions

or

Get in touch with us