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The program plan for drains set up







The program plan for drains set up

Before carrying through any DIY plumbing and drainage, you should first take into consideration the rules issued by your Local Authority.

Detailed plans of any changing or installing of sewage in your home will have to be submitted, and expect ongoing inspections until its completion to ensure that the work abides by the regulations. However you don’t need to inform them if you are just replacing some broken parts.

Surface water is basically water from rain and is handled differently from dark waste water in a modern sewage development. It can drain out through a soakaway, watercourse, surface water sewer or, especially in older houses, into the dirty water sewage pipes. In a system combining both functions, the rainwater pipes clear out into the dirty water drains through the gully traps that prevent fetid air from sneaking out of the drains. However with the new sewage systems, the foul and the surface water can be kept apart. It’s absolutely crucial that you keep the dirty water sewage system apart from the one for surface water. If you have doubts about your house’s sewage system, you can get help from the Building Control Department before you begin any work.

Designing the path of the waste passages will be your first task. Sewage pipes must be aligned as straight as possible, with inspection chambers at short intervals. If the pipe slope is excessive, your joint alignment may fail. Using surveyor’s site level you can calculate the fall of a drain over a distance to check the values. By establishing a datum point and using a hose filled with water to establish levels you can calculate the fall from the datum in a situation when do not have one of these measures available.

The stability of the existing building is of prime importance it should be not compromised while the drain ditch is being installed so check you are not impacting on the existing structure. You have to make sure that no building foundation is weakened if you are laying a drain running parallel to the building.

Try to leave as short a time as possible between digging the trench and installing the drainage system as an empty ditch represents a danger with the potential for a sidewall collapse. The pipes should be laid quickly and the trench back filled after the system has been examined thoroughly and tested as required.

Because of different depth and soil conditions the ditch will probably need to be supported. It is no advisable to not take any risks. It is better to provide support to the ditch walls than allowing the ditch to collapse. You must make the ditch as narrow as possible while leaving enough room to work inside it. The trench base must be smooth and clean, there shouldn’t be any bricks or protruding stones around. You may have to bring in the right type of material for the bottom of the ditch if the one that’s already there is not proper.

The pipe present in the trench should not be supported using bricks or other such materials. This will damage the pipe and must never be used as temporary or permanent support. The bedding should be properly compacted with hollows made to accommodate the joints in the pipes. The support should be smooth and even, from the beginning of the pipe to its end.

The drainage system should be designed in a way that pipework remains accessible to drain rods should drainage maintenance work be required. Therefore, a run of drains should be as straight as possible between two points. An inspection chamber should be present at places where the pipework changes its direction, this is important so that it remains accessible to drain rods and they do not need to go around corners.

DIY plumbing and drainage is certainly within the limits of most DIY enthusiasts.

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