Types of pipes & Fittings Fitting an Aco channel Fing new Gutter The first step when planning to fix additional drainage points to an existing system is toidentify the type of system, ie, is it a dual system with separate foul and surface waterpipelines, or is it a combined system, where foul and surface water are mixed togetherand carried in the same pipes? Checking the system: While the pointers listed above can aid in identification of a sewer system, the actualclassification of a drain must be checked below before installing any drainage 1 - Lift cover and check layout of drainage within chamber 2 - try to identify fittings that are likely to be connected to the chamber under inspection.These must be upstream of the chamber, and may be rain water pick-ups, kitchen wastegullies, toilet stacks, linear drains etc. 3 - put a garden hose into the fittings and see if the water appears in the chamber. For indoor fittings, such as baths, wash-basins or toilets, try turning on a tap or flushing the cistern. If in doubt, a drain dye can be added, turningthe water a distinctive colour that will be readilyidentified if it passes through the chamber under inspection. Fittings and Access Points There is a huge range of fittings available for all types of drainage systems. These include gullies,hoppers, traps, bends, and junctions as standard items, as well as access chambers,roddingeyes and inspection chambers which are designed to grant access for inspection and/or maintenance. Manholes tend to be larger chambers , with half-pipes known as 'channels' setinto the base . Access points: Rodding eyes Access Fittings Inspection chambers & Manholes: Must be installed at * head of run * bend or change of direction * change in pipe diameter * junction, unless all runs connected to junction can be rodded from another access point. Drainage Layout Click here PAGE 2  | |
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Thursday, 28 May 2009
Drainage
