Buchan trap: Difference between revisions
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| ⚫ | A '''Buchan trap''' (alternative names: ''Bristol interceptor'',<ref name="guardian">{{cite news |last1=Jack |first1=Ian |title=Buchan trap, blind siphon or Bristol interceptor – whatever you call it, it’s playing havoc with my drains |url=https://www.theguardian.com/commentisfree/2014/nov/22/buchan-trap-scottish-invention-bypassed-progress |access-date=28 February 2024 |work=The Guardian |date=22 November 2014}}</ref> ''interceptor trap'' and ''disconnecting trap'') is a device fitted in a domestic [[Sewerage|sewer]] pipe to prevent odours entering the pipe from the public sewer<ref name="Knowles"/> and permeating the house, a common problem before individual plumbing fittings were separately trapped. The trap is made from [[fireclay]]<ref name="guardian"/> and uses a [[Trap (plumbing)|water seal]] to prevent air passing from the sewer to the pipe. Waste flows from the house through a [[U-bend]] in the trap. This means that there is always water in the pipe preventing the passage of anything from the other direction. The device is a large clay U-bend with an air-inlet/access point on the 'house' side. It is located below the ground level, but can be accessed through the air-inlet and sometimes a rodding hole.<ref name="Knowles">{{cite web |title=Technical Data: Back Bristol Interceptor Code KBBI - NAT 137 |url=https://www.knowlesdrainage.co.uk/wp-content/uploads/2019/01/Back-Bristol-Interceptor-Data-Sheet.pdf |publisher=W T Knowles and Sons Limited Tel: 01422 372833 |access-date=28 February 2024}}</ref> |
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{{Unreferenced|date=April 2020}} |
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| ⚫ | A '''Buchan trap''' (alternative names: ''Bristol interceptor'', ''interceptor trap'' and ''disconnecting trap'') is a device |
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==Blockage risk== |
==Blockage risk== |
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==History== |
==History== |
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The Buchan trap was devised in the 19th century to stop the flow of [[sewer gas]]es |
The Buchan trap was devised in the 19th century to stop the flow of [[sewer gas]]es due to the [[miasma theory of disease]].<ref name="guardian"/> For example, it was believed that the disease [[cholera]] was an airborne infection, not waterborne. The Buchan trap is normally found in the bottom of manholes or drop-shafts. It normally denotes the end point of the domestic property's sewer before it joins the main public sewer. |
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==References== |
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{{reflist}} |
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{{DEFAULTSORT:Buchan Trap}} |
{{DEFAULTSORT:Buchan Trap}} |
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Latest revision as of 20:08, 28 February 2024
A Buchan trap (alternative names: Bristol interceptor,[1] interceptor trap and disconnecting trap) is a device fitted in a domestic sewer pipe to prevent odours entering the pipe from the public sewer[2] and permeating the house, a common problem before individual plumbing fittings were separately trapped. The trap is made from fireclay[1] and uses a water seal to prevent air passing from the sewer to the pipe. Waste flows from the house through a U-bend in the trap. This means that there is always water in the pipe preventing the passage of anything from the other direction. The device is a large clay U-bend with an air-inlet/access point on the 'house' side. It is located below the ground level, but can be accessed through the air-inlet and sometimes a rodding hole.[2]
Blockage risk
[edit]The Buchan trap will collect solids, sludge and waste that is not in suspension. In recent times, non-paper based wipes have posed a particular problem, according to most Water Authorities. The end result of these adverse conditions is a partial or complete blockage. The sewage/rainwater then backs up the pipe and exits from the lowest connected appliance (sink, bath, dish washer, washing machine, etc.). This can be a significant problem in multi-level dwellings (e.g. tenements) where those at the lowest level will receive all the waste waters from those above. They should be checked, and cleaned if required, on a recurring basis, such as annually.
History
[edit]The Buchan trap was devised in the 19th century to stop the flow of sewer gases due to the miasma theory of disease.[1] For example, it was believed that the disease cholera was an airborne infection, not waterborne. The Buchan trap is normally found in the bottom of manholes or drop-shafts. It normally denotes the end point of the domestic property's sewer before it joins the main public sewer.
References
[edit]- ^ a b c Jack, Ian (22 November 2014). "Buchan trap, blind siphon or Bristol interceptor – whatever you call it, it's playing havoc with my drains". The Guardian. Retrieved 28 February 2024.
- ^ a b "Technical Data: Back Bristol Interceptor Code KBBI - NAT 137" (PDF). W T Knowles and Sons Limited Tel: 01422 372833. Retrieved 28 February 2024.