British Standards Document
BS 4660
Thermoplastics ancillary fittings of nominal sizes 110 and 160 for belowground gravity drainage and sewerage. Specification

https://doi.org/10.3403/30430133U

BS 4660 is maintained by PRI/88. The current release of this standard is:

BS 4660:2022 Thermoplastics ancillary fittings of nominal sizes 110 and 160 for belowground gravity drainage and sewerage. Specification

https://doi.org/10.3403/30430133 (published 26/04/2022)

This standard is available from the following sources:

Other historical versions of this standard document also exist:

BS 4660:2000 [current until 26/04/2022]
BS 4660:1989 [current until 15/01/2000]
BS 4660:1973 [current until 31/10/1989]