Codes of Practice & Technical Guides

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	CODES OF PRACTICE FOR SMALL WASTEWATER TREATMENT SYSTEMS
Click here for pdf	Code of Practice - Flows & Loads 3 - Sizing Criteria, Treatment Capacity for Small Wastewater Treatment Systems This revision to the established code of practice provides a table of loadings which allows the total daily sewage load from properties to be calculated. The main change in this edition is the reduction in per capita flow to 180 liters per day. It is recommended that all designers should use this table when sizing and designing non-mains sewage treatment systems. The flows and loads values given represent current best knowledge within the UK but may change with time in line with per capita water use. Guidance notes are provided to assist the user to consider the nature of the sewage being received for treatment and to identify the various sources of the sewage to contribute to the correct sizing and design of the treatment system.
Click here for pdf	Code of Practice - Guide to the Installation of Small Wastewater Treatment Systems This guide outlines the installation requirements and process of installing a small sewage or wastewater treatment system (plant).
Click here for pdf	Code of Practice – Guide to the Desludging of Small Wastewater Treatment Systems This guide outlines what sludge is, where it comes from and the need for its safe removal and legal disposal.
Click here for pdf	Code of Practice – A Guide for Users of Small Wastewater Treatment Systems This guide provides background and general information for owners and users of small sewage or wastewater treatment systems (plant) to ensure that the system works satisfactorily to treat domestic wastewater (sewage) and so ensure that the treated effluent can be safely discharged to the environment and meets the regulators requirements.
Click here for pdf	Code of Practice – Maintenance and servicing of Small Wastewater Treatment Systems (Package Plants) up to 50 Population Equivalents (PE) and Larger Systems up to 1000PE The code of practice defines the ways in which small wastewater treatment systems (package plants) up to 50pe and larger systems up to 1000pe should be serviced and maintained. It also sets out a training and certification scheme where service technicians can obtain a recognized nationwide qualification.
	SUSTAINABLE DRAINAGE GUIDANCE PUBLICATIONS
Download PDF	Technical Guidance to Proprietary Sustainable Drainage Systems and Components The revised guidance publication provides a brief and comprehensive introduction to sustainable drainage issues and highlights the four principle areas of proprietary SUDS solutions of Flow Control, Infiltration Storage/ Attenuation and Treatment. It is intended to complement the guidance that already exists on the wide range of natural SUDS solutions such as swales, ponds and infiltration trenches. This guidance is for all stakeholders including owners, developers, regulators, consultants, contractors and planners. This revised version provides electronic links to more detailed information including direct links to proprietary technologies and systems that are available from British Water members. It is not intended to be a detailed design document but to provide information about proprietary systems that are available in the toolbox of sustainable drainage solutions. When designing systems, selecting technologies and installing equipment sound engineering practice should always be followed.
Click here for pdf	Technical Guidance to Proprietary Sustainable Drainage Systems and Components – SUDS 1st edition, February 2005 The document covers the four principle areas of proprietary SUDS solutions including infiltration, Flow Control, Storage/Attenuation and Treatment - each of which can be included in one of the three headings of the 'SUDS triangle' of Quality, Quantity and Amenity. It is intended to complement the guidance that already exists on the wide range of soft SUDS solutions such as swales, ponds and infiltration trenches. This guidance is for all stakeholders including owners, developers, regulators, consultants, contractors and planners. It provides general guidance and comparative information on the criteria that should be assessed when considering the incorporation and selection of proprietary SUDS equipment. It is not intended as a detailed design document and sound engineering practice should be followed.
Click here for pdf	Sustainable Drainage Systems: a mission to the USA This is a report of a two week study tour in 2006 (funded by Global Watch of the DTI) of Sustainable Drainage Systems on the eastern and western seaboards of the USA. It reports on meetings and discussions with leading experts, regulators, local authorities and practitioners. It describes many of the diverse approaches adopted across the USA and includes both natural and proprietary systems which were used according to the situation, the regulatory needs and the desired outcome.
	WATER TREATMENT IN THE HOME
Click here for pdf	Code of Practice for the Installation of Ion Exchange Water Softeners This Code of Practice assists manufacturers and installers of salt regenerated water softeners for direct connection to the mains water supplies, to provide well designed and well installed equipment. In preparing this document it has been assumed that the manufacturer or installer is familiar with ion exchange water softener design techniques and/or the requirements of good plumbing practice. It is not intended as a "do-it-yourself" guide.
Click here for PDF	A Consumers Guide to Water Softeners In areas of the country with a hard water supply, consumers may wish to consider the advantages of softening their water. This Guide has been produced to help answer questions about water softening.
Click here for PDF	A Consumers Guide to Physical Water Softeners "Physical Water Conditioner" is an umbrella term used to describe a group of products which can reduce, prevent or remove the formation of hard (lime) scale in areas supplied with hard water. They are generally small devices which are simple to install and are either plumbed in or externally attached to the water pipe close to the point of entry into the property; some need a mains power supply.