This British Standard specifies requirements for thermoplastics ancillary access fittings suitable for the construction of gravity drains and sewers, other than conventional branches, bends and couplers which are covered in BS EN 1401-1:1998. It is applicable to access fittings with nominal sizes of 110 and 160 together with necessary joints and accessories.
Methods of test, associated guidance and information on quality control testing are given in annexes A to C.
BS 4660:2000 history
2022BS 4660:2022 Thermoplastics ancillary fittings of nominal sizes 110 and 160 for belowground gravity drainage and sewerage. Specification
2011BS EN 13598-1:2010 Plastics piping systems for non-pressure underground drainage and sewerage. Unplasticized poly(vinyl chloride) (PVC-U), polypropylene (PP) and polyethylene (PE). Specifications for ancillary fittings including shallow inspection chambers
2003BS EN 13598-1:2003 Plastics piping systems for non-pressure underground drainage and sewerage - Unplasticized poly(vinyl chloride) (PVC-U), polypropylene (PP) and polyethylene (PE) - Specifications for ancillary fittings including shallow inspection chambers
2000BS 4660:2000 Thermoplastics ancillary fittings of nominal sizes 110 and 160 for below ground gravity drainage and sewerage