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Drains are a hidden world. How can you find out whether drains or water supplies are leaking? Where are they? Who is responsible for them? How can they be repaired? This programme delves into this hidden world and brings back the answers.
DVD Topics:
1. The worst laid plans
 Case study of mains incorrectly laid under road
Who is responsible for road mains?
2. An elegant mistake
Case study of poorly designed plumbing in tower block
3. What’s under the floor?
Under floor leaks in timber and solid floors
4. Boxed in
Problems with hidden drainage in tower block
5. Detecting mains leaks
Chemical test
Listening stick
Mains access cover inspection
Siphon test
6. Into the hidden world – day 1
A site visit with Ansa
Methods for dealing with drains in-situ
CCTV
Water jetting
Invert levels and sufficient falls
Detecting services
Discussion of pipe-bursting and impact-moleing
7. The root cause
Tree roots and over-planting
8. Into the hidden world – day 2
A second site visit with Ansa
Root cutters
Pipe lining
Discussion of re-rounding
Health & safety issues
9. Simple Drain checks
Flush test
Pressure test
10. Rainfall & ground water
Part H of Building Regulations
Ground water measurement
11. Flood drainage
Case study in Snowdonia
12. SUDS – The future of drainage
Sustainable Urban Drainage Systems
Bonus Section
Extreme insulation in Scandinavia – resulting problems
An American on-site building survey
Hong Kong ruins – a trip round some Chang Dynasty ruins with Bill Greaves, Senior Projects Officer, Hong Kong Antiquities and Monuments Dept.
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