Marley Plumbing & Drainage, trading name of DHM Plastics Ltd is certified to the following Quality Assurance schemes/standards:
BS 7291: 2006 Thermoplastics pipes and associated fittings for hot and cold water for domestic purposes and heating installations in buildings. General requirements
BS 7291: 2006 Thermoplastics pipes and associated fittings for hot and cold water for domestic purposes and heating installations in buildings. Specification for cross-linked polyethylene pipes and fittings
BS EN 1462: 2004 Brackets for eaves gutters. Requirements and testing
BS EN 607: 2004 Eaves gutters and fittings made of PVC-U. Definitions, requirements and testing
BS EN ISO 14001: 2004 – BSI
BS 4514: 2001 Unplasticized PVC soil and ventilating pipes of 82.4mm minimum mean outside diameter, and fittings and accessories of 82.4mm and of other sizes. Specification
BS EN 12200: 2000 Plastics rainwater piping systems for above ground external use. Unplasticized poly (vinyl chloride) (PVC-U). Specifications for pipes, fittings and the system
BS EN 1329: 2000 Plastics piping systems for soil and waste discharge (low and high temperature) within the building structure. Unplasticized PVC. Specifications for pipes, fittings and the system
BS EN 1451: 2000 Plastics piping systems for soil and waste discharge (low and high temperature) within the building structure. Polypropylene (PP). Specifications for pipes, fittings and the system
BS EN 1455: 2000 Plastics piping systems for soil and waste (low and high temperature) within the building structure. Acrylonitrile-butadiene-styrene (ABS). Specifications for pipes, fittings and the system
BS EN 1566: 2000 Plastics piping systems for soil and waste discharge (low and high temperature) within the building structure. Chlorinated PVC. Specification for pipes, fittings and the system
BS EN 1401: 1998 Plastics piping systems for non-pressure underground drainage and sewerage. Unplasticized poly(vinylchloride) (PVC-U). Specifications for pipes, fittings and the system
BS 5255: 1989 Specification for thermoplastics waste pipe and fittings
BBA Certificate 00/3763 – Marley Equator PE-X pipe and fittings
BBA Certificate 09/H146 – Marley Quantum highway PVC-U Twinwall surface water drainage system
BBA Certificate 88/1977 – Underground drainage system
BBA Certificate 92/R070 – Quantum highway PVC-U Twinwall drainage system
BBA Certificate 94/2985 – Marley Quantum PVC-U underground drainage and sewerage system
BBA Certificate 98/3486 – Quantum highway PVC-U Twinwall surface water drainage system