Hot water safety - Revision history

Editor at 14:00, 12 November 2021

2021-11-12T14:00:05Z

← Older revision		Revision as of 14:00, 12 November 2021
Line 79:		Line 79:
	* Hot water safety in health and social care settings.		* Hot water safety in health and social care settings.
	* Plumbing.		* Plumbing.
		+	* Stagnation point.
	* Tap.		* Tap.
	* Water heating.		* Water heating.

Editor at 16:29, 11 November 2021

2021-11-11T16:29:42Z

← Older revision		Revision as of 16:29, 11 November 2021
Line 77:		Line 77:
	* Building services.		* Building services.
	* Hot water.		* Hot water.
		+	* Hot water safety in health and social care settings.
	* Plumbing.		* Plumbing.
	* Tap.		* Tap.

Editor at 16:30, 9 November 2021

2021-11-09T16:30:25Z

← Older revision		Revision as of 16:30, 9 November 2021
Line 71:		Line 71:
	* [https://shop.bsigroup.com/ProductDetail/?pid=000000000030166729 BS EN 12897:2006 Water supply].		* [https://shop.bsigroup.com/ProductDetail/?pid=000000000030166729 BS EN 12897:2006 Water supply].

−	= Related articles on Designing Buildings ~~Wiki~~ =	+	= Related articles on Designing Buildings =

		+	* A guide to installing thermostatic mixing valves: what, why and how.
	* Approved Document G.		* Approved Document G.
	* Building services.		* Building services.

Designing Buildings at 07:30, 1 April 2021

2021-04-01T07:30:39Z

← Older revision		Revision as of 07:30, 1 April 2021
Line 14:		Line 14:
	Section G3 of [https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/504207/BR_PDF_AD_G_2015_with_2016_amendments.pdf Approved Document G] defines ‘domestic hot water’ as water that has been heated for cooking, food preparation, personal washing or cleaning purposes. Under Approved Document G, the “suitable installation for the provision of heated wholesome water or heated softened wholesome water” is required.		Section G3 of [https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/504207/BR_PDF_AD_G_2015_with_2016_amendments.pdf Approved Document G] defines ‘domestic hot water’ as water that has been heated for cooking, food preparation, personal washing or cleaning purposes. Under Approved Document G, the “suitable installation for the provision of heated wholesome water or heated softened wholesome water” is required.

−	Section G3 provides specific guidance regarding hot water safety for sanitaryware (including washbasins, sinks, baths, showers, bidets) and other water storage systems (including cisterns or other water supply vessels). Under Section G3, systems should incorporate precautions to:	+	Section G3 provides specific guidance regarding hot water safety for sanitaryware (including washbasins, sinks, baths, showers and bidets) and other water storage systems (including cisterns or other water supply vessels). Under Section G3, systems should incorporate precautions to:

	* Prevent the temperature of the water stored in the vessel at any time exceeding 100C.		* Prevent the temperature of the water stored in the vessel at any time exceeding 100C.
Line 23:		Line 23:
	Section G3 provides specific information on additional areas, including		Section G3 provides specific information on additional areas, including

−	== Guidance ==	+	Guidance:

	* Performance		* Performance
Line 29:		Line 29:
	* Provision of hot water supply		* Provision of hot water supply

−	== Design and installation of directly or indirectly heated hot water storage systems ==	+	Design and installation of directly or indirectly heated hot water storage systems:

	* General		* General
Line 37:		Line 37:
	* Unvented hot water storage systems – systems over 500 litres capacity or over 45kW power input		* Unvented hot water storage systems – systems over 500 litres capacity or over 45kW power input

−	== Safety devices ==	+	Safety devices:

	* Non-self-resetting energy cut-outs		* Non-self-resetting energy cut-outs
	* Temperature and pressure relief devices		* Temperature and pressure relief devices

−	== Electric water heating ==	+	Electric water heating

−	== Solar water heating ==	+	Solar water heating

−	== Discharge pipes from safety devices ==	+	Discharge pipes from safety devices:

	* Discharge pipe D1		* Discharge pipe D1
Line 53:		Line 53:
	* Termination of discharge pipe		* Termination of discharge pipe

−	== Prevention of excessive temperatures ==	+	Prevention of excessive temperatures

−	== Prevention of scalding ==	+	Prevention of scalding

	* Installation		* Installation

−	== Commissioning of fixed building services ==	+	Commissioning of fixed building services

−	== Notice of completion of commissioning ==	+	Notice of completion of commissioning

	= Further guidance =		= Further guidance =

−	In addition to the information in ~~Section G3 of~~ Approved Document G, further guidance for hot water storage system design and installation ~~standards~~ can be found in three British Standards Institution (BSI) documents:	+	In addition to the information in Approved Document G, further guidance for hot water storage system design and installation can be found in three British Standards Institution (BSI) documents:

	* [https://shop.bsigroup.com/ProductDetail?pid=000000000030200074 BS EN 806-5:2012 Specifications for installations inside buildings conveying water for human consumption. Operation and maintenance.]		* [https://shop.bsigroup.com/ProductDetail?pid=000000000030200074 BS EN 806-5:2012 Specifications for installations inside buildings conveying water for human consumption. Operation and maintenance.]

Editor at 17:23, 31 March 2021

2021-03-31T17:23:31Z

← Older revision		Revision as of 17:23, 31 March 2021
Line 86:		Line 86:
	* BSI, [https://shop.bsigroup.com/ProductDetail/?pid=000000000030166729 BS EN 12897:2006 Water supply].		* BSI, [https://shop.bsigroup.com/ProductDetail/?pid=000000000030166729 BS EN 12897:2006 Water supply].
	* Gov.uk, [https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/504207/BR_PDF_AD_G_2015_with_2016_amendments.pdf Approved Document G].		* Gov.uk, [https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/504207/BR_PDF_AD_G_2015_with_2016_amendments.pdf Approved Document G].
		+
		+	[[Category:DCN_Guidance]] [[Category:DCN_Regulation]] [[Category:DCN_Standard]] [[Category:Water]] [[Category:Health_and_safety_/_CDM]] [[Category:Regulations]] [[Category:Standards_/_measurements]]

Editor at 17:16, 31 March 2021

2021-03-31T17:16:58Z

← Older revision		Revision as of 17:16, 31 March 2021
Line 72:		Line 72:

	= Related articles on Designing Buildings Wiki =		= Related articles on Designing Buildings Wiki =
		+
		+	* Approved Document G.
		+	* Building services.
		+	* Hot water.
		+	* Plumbing.
		+	* Tap.
		+	* Water heating.

	= External resources =		= External resources =

Editor at 17:14, 31 March 2021

2021-03-31T17:14:17Z

← Older revision		Revision as of 17:14, 31 March 2021
Line 1:		Line 1:
−	[[File:SteamyShower.jpg]]	+	[[File:SteamyShower.jpg\|link=File:SteamyShower.jpg]]

	= Introduction =		= Introduction =
Line 12:		Line 12:
	= Hot water safety under Section G3 of Approved Document G =		= Hot water safety under Section G3 of Approved Document G =

−	Section G3 of Approved Document G defines ‘domestic hot water’ as water that has been heated for cooking, food preparation, personal washing or cleaning purposes. Under Approved Document G, the “suitable installation for the provision of heated wholesome water or heated softened wholesome water” is required.	+	Section G3 of [https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/504207/BR_PDF_AD_G_2015_with_2016_amendments.pdf Approved Document G] defines ‘domestic hot water’ as water that has been heated for cooking, food preparation, personal washing or cleaning purposes. Under Approved Document G, the “suitable installation for the provision of heated wholesome water or heated softened wholesome water” is required.

	Section G3 provides specific guidance regarding hot water safety for sanitaryware (including washbasins, sinks, baths, showers, bidets) and other water storage systems (including cisterns or other water supply vessels). Under Section G3, systems should incorporate precautions to:		Section G3 provides specific guidance regarding hot water safety for sanitaryware (including washbasins, sinks, baths, showers, bidets) and other water storage systems (including cisterns or other water supply vessels). Under Section G3, systems should incorporate precautions to:
Line 65:		Line 65:
	= Further guidance =		= Further guidance =

−	In addition to the information in Section G3 of Approved Document G, further guidance for hot water storage system design and installation standards can be found in ~~two~~ British Standards Institution (BSI) documents:	+	In addition to the information in Section G3 of Approved Document G, further guidance for hot water storage system design and installation standards can be found in three British Standards Institution (BSI) documents:

−	* ~~BS 6700~~:~~2006 + A1~~:~~2009 Specification~~ for design, installation, testing and maintenance of services supplying water for domestic use within buildings and their curtilages.	+	* [https://shop.bsigroup.com/ProductDetail?pid=000000000030200074 BS EN 806-5:2012 Specifications for installations inside buildings conveying water for human consumption. Operation and maintenance.]
−	* BS EN 12897:2006 Water supply.	+	* [https://shop.bsigroup.com/ProductDetail/?pid=000000000030299695 BS 8558:2015 Guide to the design, installation, testing and maintenance of services supplying water for domestic use within buildings and their curtilages].
		+	* [https://shop.bsigroup.com/ProductDetail/?pid=000000000030166729 BS EN 12897:2006 Water supply].

	= Related articles on Designing Buildings Wiki =		= Related articles on Designing Buildings Wiki =
		+
		+	= External resources =
		+
		+	* BSI, [https://shop.bsigroup.com/ProductDetail?pid=000000000030200074 BS EN 806-5:2012 Specifications for installations inside buildings conveying water for human consumption. Operation and maintenance.]
		+	* BSI, [https://shop.bsigroup.com/ProductDetail/?pid=000000000030299695 BS 8558:2015 Guide to the design, installation, testing and maintenance of services supplying water for domestic use within buildings and their curtilages].
		+	* BSI, [https://shop.bsigroup.com/ProductDetail/?pid=000000000030166729 BS EN 12897:2006 Water supply].
		+	* Gov.uk, [https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/504207/BR_PDF_AD_G_2015_with_2016_amendments.pdf Approved Document G].

Editor: Created page with "File:SteamyShower.jpg = Introduction = Hot water is considered an essential building service. The two components of a typical hot water system are: * The central heating s..."

2021-03-31T17:05:24Z

Created page with "File:SteamyShower.jpg = Introduction = Hot water is considered an essential building service. The two components of a typical hot water system are: * The central heating s..."

New page

[[File:SteamyShower.jpg]]

= Introduction =

Hot water is considered an essential building service. The two components of a typical hot water system are:

* The central heating system which supplies hot water to radiators located around a building.
* Domestic hot water supplied to taps and sometimes to appliances.

The water and pipework used for these two systems are not mixed, although both share some of the same components.

= Hot water safety under Section G3 of Approved Document G =

Section G3 of Approved Document G defines ‘domestic hot water’ as water that has been heated for cooking, food preparation, personal washing or cleaning purposes. Under Approved Document G, the “suitable installation for the provision of heated wholesome water or heated softened wholesome water” is required.

Section G3 provides specific guidance regarding hot water safety for sanitaryware (including washbasins, sinks, baths, showers, bidets) and other water storage systems (including cisterns or other water supply vessels). Under Section G3, systems should incorporate precautions to:

* Prevent the temperature of the water stored in the vessel at any time exceeding 100C.
* Ensure that any discharge from safety devices is safely conveyed to where it is visible but will not cause a danger to persons in or about the building.

Furthermore, the hot water supply to any fixed bath must be so designed and installed as to incorporate measures to ensure that the temperature of the water that can be delivered to that bath does not exceed 48C.

Section G3 provides specific information on additional areas, including

== Guidance ==

* Performance
* General
* Provision of hot water supply

== Design and installation of directly or indirectly heated hot water storage systems ==

* General
* Vented hot water storage systems
* Unvented hot water storage systems – all systems
* Unvented hot water storage systems – systems up to 500 litres capacity and 45kW power input
* Unvented hot water storage systems – systems over 500 litres capacity or over 45kW power input

== Safety devices ==

* Non-self-resetting energy cut-outs
* Temperature and pressure relief devices

== Electric water heating ==

== Solar water heating ==

== Discharge pipes from safety devices ==

* Discharge pipe D1
* Tundish
* Discharge pipe D2
* Termination of discharge pipe

== Prevention of excessive temperatures ==

== Prevention of scalding ==

* Installation

== Commissioning of fixed building services ==

== Notice of completion of commissioning ==

= Further guidance =

In addition to the information in Section G3 of Approved Document G, further guidance for hot water storage system design and installation standards can be found in two British Standards Institution (BSI) documents:

* BS 6700:2006 + A1:2009 Specification for design, installation, testing and maintenance of services supplying water for domestic use within buildings and their curtilages.
* BS EN 12897:2006 Water supply.

= Related articles on Designing Buildings Wiki =