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		<id>https://www.designingbuildings.co.uk/w/index.php?action=history&amp;feed=atom&amp;title=Inverted_siphon</id>
		<title>Inverted siphon - Revision history</title>
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		<updated>2026-06-01T18:09:51Z</updated>
		<subtitle>Revision history for this page on the wiki</subtitle>
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	<entry>
		<id>https://www.designingbuildings.co.uk/w/index.php?title=Inverted_siphon&amp;diff=185141&amp;oldid=prev</id>
		<title>Designing Buildings at 11:23, 7 December 2020</title>
		<link rel="alternate" type="text/html" href="https://www.designingbuildings.co.uk/w/index.php?title=Inverted_siphon&amp;diff=185141&amp;oldid=prev"/>
				<updated>2020-12-07T11:23:45Z</updated>
		
		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: white; color:black;&quot;&gt;
			&lt;col class='diff-marker' /&gt;
			&lt;col class='diff-content' /&gt;
			&lt;col class='diff-marker' /&gt;
			&lt;col class='diff-content' /&gt;
		&lt;tr valign='top'&gt;
		&lt;td colspan='2' style=&quot;background-color: white; color:black;&quot;&gt;← Older revision&lt;/td&gt;
		&lt;td colspan='2' style=&quot;background-color: white; color:black;&quot;&gt;Revision as of 11:23, 7 December 2020&lt;/td&gt;
		&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 2:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 2:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;In relation to inverted siphons (or sag culverts), it suggests that: ‘Culverts may form part of a in inverted siphon, which is a conduit that allows water to flow beneath and obstruction and ‘uphill’ again without mechanical pumping… It is a misnomer as there is actually no siphonic action, the flow being carried under a pressure head.’&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;In relation to inverted siphons (or sag culverts), it suggests that: ‘Culverts may form part of a in inverted siphon, which is a conduit that allows water to flow beneath and obstruction and ‘uphill’ again without mechanical pumping… It is a misnomer as there is actually no siphonic action, the flow being carried under a pressure head.’&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;#160;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;background: #cfc; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;color: red; font-weight: bold; text-decoration: none;&quot;&gt;&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;#160;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;background: #cfc; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;color: red; font-weight: bold; text-decoration: none;&quot;&gt;See also: Siphon.&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;= Related articles on Designing Buildings Wiki =&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;= Related articles on Designing Buildings Wiki =&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 13:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 15:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;* River engineering.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;* River engineering.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;* Scour.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;* Scour.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;#160;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;background: #cfc; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;color: red; font-weight: bold; text-decoration: none;&quot;&gt;* Siphon.&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;* SUDS Manual.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;* SUDS Manual.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;* Sustainable Urban Drainage Systems.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;* Sustainable Urban Drainage Systems.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Designing Buildings</name></author>	</entry>

	<entry>
		<id>https://www.designingbuildings.co.uk/w/index.php?title=Inverted_siphon&amp;diff=184355&amp;oldid=prev</id>
		<title>Designing Buildings at 10:22, 1 December 2020</title>
		<link rel="alternate" type="text/html" href="https://www.designingbuildings.co.uk/w/index.php?title=Inverted_siphon&amp;diff=184355&amp;oldid=prev"/>
				<updated>2020-12-01T10:22:59Z</updated>
		
		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: white; color:black;&quot;&gt;
			&lt;col class='diff-marker' /&gt;
			&lt;col class='diff-content' /&gt;
			&lt;col class='diff-marker' /&gt;
			&lt;col class='diff-content' /&gt;
		&lt;tr valign='top'&gt;
		&lt;td colspan='2' style=&quot;background-color: white; color:black;&quot;&gt;← Older revision&lt;/td&gt;
		&lt;td colspan='2' style=&quot;background-color: white; color:black;&quot;&gt;Revision as of 10:22, 1 December 2020&lt;/td&gt;
		&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 1:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 1:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;minus;&lt;/td&gt;&lt;td style=&quot;background: #ffa; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;An inverted siphon is&lt;/del&gt;: &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;‘A closed conduit with a U-shaped profile&lt;/del&gt;, &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;although the term is &lt;/del&gt;a &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;misnomer because there is no siphonic action. Also known &lt;/del&gt;as a &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;sag culvert &lt;/del&gt;or &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;pressure culvert&lt;/del&gt;.&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;’&lt;/del&gt;&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;background: #cfc; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;[https&lt;/ins&gt;:&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;//www.ciria.org/ItemDetail?iProductCode=C786F&amp;amp;amp;Category=FREEPUBS Culvert&lt;/ins&gt;, &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;screen and outfall manual, (CIRIA C786)] published by CIRIA in 2019, defines &lt;/ins&gt;a &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;culvert &lt;/ins&gt;as&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;: 'A covered channel or pipe which prevents the obstruction of &lt;/ins&gt;a &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;watercourse &lt;/ins&gt;or &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;drainage path by an artificial construction&lt;/ins&gt;.&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;'&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;minus;&lt;/td&gt;&lt;td style=&quot;background: #ffa; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;Ref [https&lt;/del&gt;:&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;//www.ciria.org/ItemDetail?iProductCode=C786F&amp;amp;amp;Category=FREEPUBS Culvert&lt;/del&gt;, &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;screen &lt;/del&gt;and &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;outfall manual&lt;/del&gt;, &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;(CIRIA C786)] published by CIRIA in 2019&lt;/del&gt;.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;background: #cfc; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;In relation to inverted siphons (or sag culverts), it suggests that&lt;/ins&gt;: &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;‘Culverts may form part of a in inverted siphon&lt;/ins&gt;, &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;which is a conduit that allows water to flow beneath &lt;/ins&gt;and &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;obstruction and ‘uphill’ again without mechanical pumping… It is a misnomer as there is actually no siphonic action&lt;/ins&gt;, &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;the flow being carried under a pressure head&lt;/ins&gt;.&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;’&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;= Related articles on Designing Buildings Wiki =&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;= Related articles on Designing Buildings Wiki =&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 18:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 18:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;* Water engineering.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;* Water engineering.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background: #eee; color:black; font-size: smaller;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;minus;&lt;/td&gt;&lt;td style=&quot;background: #ffa; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;[[Category:&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;Definitions&lt;/del&gt;]] [[Category:&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;DCN_Definition&lt;/del&gt;]]&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;background: #cfc; color:black; font-size: smaller;&quot;&gt;&lt;div&gt;[[Category:&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;DCN_Definition&lt;/ins&gt;]] [[Category:&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;Definitions&lt;/ins&gt;]]&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Designing Buildings</name></author>	</entry>

	<entry>
		<id>https://www.designingbuildings.co.uk/w/index.php?title=Inverted_siphon&amp;diff=170095&amp;oldid=prev</id>
		<title>Designing Buildings: Created page with &quot;An inverted siphon is: ‘A closed conduit with a U-shaped profile, although the term is a misnomer because there is no siphonic action. Also known as a sag culvert or pressure c...&quot;</title>
		<link rel="alternate" type="text/html" href="https://www.designingbuildings.co.uk/w/index.php?title=Inverted_siphon&amp;diff=170095&amp;oldid=prev"/>
				<updated>2020-08-11T09:18:40Z</updated>
		
		<summary type="html">&lt;p&gt;Created page with &amp;quot;An inverted siphon is: ‘A closed conduit with a U-shaped profile, although the term is a misnomer because there is no siphonic action. Also known as a sag culvert or pressure c...&amp;quot;&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;An inverted siphon is: ‘A closed conduit with a U-shaped profile, although the term is a misnomer because there is no siphonic action. Also known as a sag culvert or pressure culvert.’&lt;br /&gt;
&lt;br /&gt;
Ref [https://www.ciria.org/ItemDetail?iProductCode=C786F&amp;amp;amp;Category=FREEPUBS Culvert, screen and outfall manual, (CIRIA C786)] published by CIRIA in 2019.&lt;br /&gt;
&lt;br /&gt;
= Related articles on Designing Buildings Wiki =&lt;br /&gt;
&lt;br /&gt;
* Catchment flood management plans.&lt;br /&gt;
* Culvert.&lt;br /&gt;
* Flood and water management act.&lt;br /&gt;
* Flood risk management plans&lt;br /&gt;
* Flood risk.&lt;br /&gt;
* Pitt Review Lessons learned from the 2007 floods.&lt;br /&gt;
* River engineering.&lt;br /&gt;
* Scour.&lt;br /&gt;
* SUDS Manual.&lt;br /&gt;
* Sustainable Urban Drainage Systems.&lt;br /&gt;
* Swales.&lt;br /&gt;
* Water engineering.&lt;br /&gt;
&lt;br /&gt;
[[Category:Definitions]] [[Category:DCN_Definition]]&lt;/div&gt;</summary>
		<author><name>Designing Buildings</name></author>	</entry>

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