Back siphonage - Revision history

Editor at 20:00, 31 January 2022

2022-01-31T20:00:44Z

← Older revision		Revision as of 20:00, 31 January 2022
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	* Water consumption.		* Water consumption.
	* Water Services Regulation Authority.		* Water Services Regulation Authority.
		+	* Water Supply (Water Fittings) Regulations 1999.

	= External resources =		= External resources =

Editor at 18:28, 28 January 2022

2022-01-28T18:28:48Z

← Older revision		Revision as of 18:28, 28 January 2022
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	Water-using appliances must provide an acceptable degree of protection against backflow or back siphonage. These parameters are determined in [https://shop.bsigroup.com/ProductDetail?pid=000000000000097901 BS 6280:1982 Method of vacuum (backsiphonage) test for water-using appliances]. Recommendations are also proscribed under the [https://www.legislation.gov.uk/uksi/1999/1148/made Water Supply (Water Fittings) Regulations 1999].		Water-using appliances must provide an acceptable degree of protection against backflow or back siphonage. These parameters are determined in [https://shop.bsigroup.com/ProductDetail?pid=000000000000097901 BS 6280:1982 Method of vacuum (backsiphonage) test for water-using appliances]. Recommendations are also proscribed under the [https://www.legislation.gov.uk/uksi/1999/1148/made Water Supply (Water Fittings) Regulations 1999].

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

	* Backflow.		* Backflow.
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	* Siphon.		* Siphon.
	* Vacuum breaker.		* Vacuum breaker.
		+	* Warning pipe.
	* Water consumption.		* Water consumption.
	* Water Services Regulation Authority.		* Water Services Regulation Authority.

Designing Buildings at 07:41, 14 July 2021

2021-07-14T07:41:03Z

← Older revision		Revision as of 07:41, 14 July 2021
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	* Potable water.		* Potable water.
	* Siphon.		* Siphon.
		+	* Vacuum breaker.
	* Water consumption.		* Water consumption.
	* Water Services Regulation Authority.		* Water Services Regulation Authority.

Designing Buildings at 08:14, 7 May 2021

2021-05-07T08:14:55Z

← Older revision		Revision as of 08:14, 7 May 2021
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	It defines back siphonage as: ‘The siphoning of part of a plumbing system caused by the failure of mains water pressure’.		It defines back siphonage as: ‘The siphoning of part of a plumbing system caused by the failure of mains water pressure’.

−	The negative pressure (or vacuum) that results in back siphonage can happen under ~~certain~~ conditions, such as a water mains break or an increased use of water for fire fighting or construction purposes. When the vacuum occurs and the supply pressure decreases, back siphonage causes the water flow (or other liquid substances) to reverse ~~its direction~~.	+	The negative pressure (or vacuum) that results in back siphonage can happen under conditions such as a water mains break or an increased use of water for fire fighting or construction purposes. When the vacuum occurs and the supply pressure decreases, back siphonage causes the water flow (or other liquid substances) to reverse.

	Back siphonage may result in contaminated water being pulled into the clean water supply. This action is referred to as backflow. Backflow can also take place due to back pressure, which can occur when there is higher pressure in the system than in its supply. This can happen in certain types of heating systems where the pressure is increased for some reason (such as thermal expansion in unvented systems).		Back siphonage may result in contaminated water being pulled into the clean water supply. This action is referred to as backflow. Backflow can also take place due to back pressure, which can occur when there is higher pressure in the system than in its supply. This can happen in certain types of heating systems where the pressure is increased for some reason (such as thermal expansion in unvented systems).

Editor at 15:56, 6 May 2021

2021-05-06T15:56:56Z

← Older revision		Revision as of 15:56, 6 May 2021
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	* Plumbing.		* Plumbing.
	* Potable water.		* Potable water.
		+	* Siphon.
	* Water consumption.		* Water consumption.
	* Water Services Regulation Authority.		* Water Services Regulation Authority.

Editor at 15:56, 6 May 2021

2021-05-06T15:56:20Z

← Older revision		Revision as of 15:56, 6 May 2021
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	{\|		{\|
−	\| [[File:BackflowPreventor.jpg]]	+	\| [[File:BackflowPreventor.jpg\|link=File:BackflowPreventor.jpg]]
	\|-		\|-
	\| This backflow prevention device includes a valve assembly with isolation valves and strainer.		\| This backflow prevention device includes a valve assembly with isolation valves and strainer.
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	An atmospheric vacuum breaker (or AVB) can be used to prevent back siphonage. It is a type of backflow prevention device that can be used in situations where it is not possible to create an air gap.		An atmospheric vacuum breaker (or AVB) can be used to prevent back siphonage. It is a type of backflow prevention device that can be used in situations where it is not possible to create an air gap.

−	Water-using appliances must provide an acceptable degree of protection against backflow or back siphonage. These parameters are determined in BS 6280:1982 Method of vacuum (backsiphonage) test for water-using appliances~~. (https://shop.bsigroup.com/ProductDetail?pid=000000000000097901)~~. Recommendations are also proscribed under the ~~Water Supply (Water Fittings) Regulations 1999~~ https://www.legislation.gov.uk/uksi/1999/1148/made	+	Water-using appliances must provide an acceptable degree of protection against backflow or back siphonage. These parameters are determined in [https://shop.bsigroup.com/ProductDetail?pid=000000000000097901 BS 6280:1982 Method of vacuum (backsiphonage) test for water-using appliances]. Recommendations are also proscribed under the [https://www.legislation.gov.uk/uksi/1999/1148/made Water Supply (Water Fittings) Regulations 1999].

	= Related articles on Designing Buildings Wiki =		= Related articles on Designing Buildings Wiki =
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	= External resources =		= External resources =

−	BSI, BS 6280:1982 Method of vacuum (backsiphonage) test for water-using appliances. (https://~~shop~~.~~bsigroup~~.~~com~~/~~ProductDetail?pid=000000000000097901~~)	+	* BSI, [https://shop.bsigroup.com/ProductDetail?pid=000000000000097901 BS 6280:1982 Method of vacuum (backsiphonage) test for water-using appliances].
		+	* Legislation.gov.uk, [https://www.legislation.gov.uk/uksi/1999/1148/made Water Supply (Water Fittings) Regulations 1999].

−	~~Legislation.gov.uk, Water Supply (~~Water ~~Fittings) Regulations 1999 https~~://~~www.legislation.gov.uk/uksi/1999/1148/made.~~	+	[[Category:DCN_Definition]] [[Category:DCN_Guidance]] [[Category:DCN_Legislation]] [[Category:DCN_Regulation]] [[Category:Definitions]] [[Category:Water]] [[Category:Health_and_safety_/_CDM]] [[Category:Regulations]] [[Category:Standards_/_measurements]]

Editor: Created page with "{| | File:BackflowPreventor.jpg |- | This backflow prevention device includes a valve assembly with isolation valves and strainer. |} Collins Complete Do-It-Yourself Manual ..."

2021-05-06T15:53:13Z

Created page with "{| | File:BackflowPreventor.jpg |- | This backflow prevention device includes a valve assembly with isolation valves and strainer. |} Collins Complete Do-It-Yourself Manual ..."

New page

{|
| [[File:BackflowPreventor.jpg]]
|-
| This backflow prevention device includes a valve assembly with isolation valves and strainer.
|}

Collins Complete Do-It-Yourself Manual was published in 1986. It was created for William Collins Sons & Co. Ltd. by Jackson Day and conceived by Jackson Day Jennings Ltd.

It defines back siphonage as: ‘The siphoning of part of a plumbing system caused by the failure of mains water pressure’.

The negative pressure (or vacuum) that results in back siphonage can happen under certain conditions, such as a water mains break or an increased use of water for fire fighting or construction purposes. When the vacuum occurs and the supply pressure decreases, back siphonage causes the water flow (or other liquid substances) to reverse its direction.

Back siphonage may result in contaminated water being pulled into the clean water supply. This action is referred to as backflow. Backflow can also take place due to back pressure, which can occur when there is higher pressure in the system than in its supply. This can happen in certain types of heating systems where the pressure is increased for some reason (such as thermal expansion in unvented systems).

= Preventing back siphonage =

Air gaps can be used to help prevent both back siphonage and backflow. An air gap is a cleared vertical space that is placed in a way that allows it to control the water supply. These gaps can be used to regulate the pressure.

An atmospheric vacuum breaker (or AVB) can be used to prevent back siphonage. It is a type of backflow prevention device that can be used in situations where it is not possible to create an air gap.

Water-using appliances must provide an acceptable degree of protection against backflow or back siphonage. These parameters are determined in BS 6280:1982 Method of vacuum (backsiphonage) test for water-using appliances. (https://shop.bsigroup.com/ProductDetail?pid=000000000000097901). Recommendations are also proscribed under the Water Supply (Water Fittings) Regulations 1999 https://www.legislation.gov.uk/uksi/1999/1148/made

= Related articles on Designing Buildings Wiki =

* Backflow.
* Mains water.
* Plumbing.
* Potable water.
* Water consumption.
* Water Services Regulation Authority.

= External resources =

BSI, BS 6280:1982 Method of vacuum (backsiphonage) test for water-using appliances. (https://shop.bsigroup.com/ProductDetail?pid=000000000000097901)

Legislation.gov.uk, Water Supply (Water Fittings) Regulations 1999 https://www.legislation.gov.uk/uksi/1999/1148/made.