Putting in drain pipes, do this 1st







Putting in drain pipes, do this 1st

The first thing that you will need to think about when undertaking any DIY plumbing and drainage are the regulations 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 will probably not have to inform the Local Authority for replacement of broken parts or sections of sewage as permission will have already been granted for the initial fitting.

Surface water is basically water from rain and is handled differently from dark waste water in a modern drainage development. This can discharged into a soakaway, watercourse, surface water sewer or, particularly in older properties, into the foul water sewage system. The rainwater pipes in combined drainage systems empty their discharge into the foul water drains through gully traps, this prevent foul air from escaping outside creating odours. However, modern systems are designed to keep the foul water and the surface water apart. To comply with modern planning rules you should always make sure that the foul water and surface water drainage system do not connect. When in doubt about the how the modern sewage system works, consult the Building Control Department.

Of course, the first thing you should do is plan the layout of the waste pipes. Have an eye to future maintenance when you design the sewage system and always try to keep the waste or soil pipe as straight and short as you can when you are devising the layout. Also, make sure none of the pipes are laid at too steep an angle. You can calculate the fall of a drain over a distance using a surveyors site level. In case you don’t have a surveyors site level, choose a datum point and then a water filled hosepipe can be used to calculate the fall from there.

Be very careful not to excavate too close to your house, as you may undermine the foundation and cause a structural collapse. Keep the drain excavation at a uniformly safe distance from the home face to avoid damage to the foundation.

While installing a new sewage system make sure that you do not dig too long before laying the pipe. Get the pipes laid quickly and, as soon as they have been tested, fill the ditch back in.

The trench may need to be supported depending on the depth and soil conditions. You should avoid any risks with this project. If you are not entirely confident of the stability of the trench you should add support. The ditch should be narrow, but spacious enough for people to work with any required tools. Ensure that the trench bottom is flat and free of stones, tree roots and soft spots. The base should be good so you may need to import material if the existing soil structuire is not up to the mark.

Bricks and/or any other sturdy material should never be used to prop up the pipe in the trench. This will damage the pipe and must never be used as temporary or permanent support. The material used for bedding should be firmly compacted down with a depression created to allow the joints in the pipes to fit easily. A comprehensive support should be used for the whole of the pipe.

When designing your sewage system, it is important to make all parts of the pipework reachable via a set of drain rods should a blockage occur. Which means that a run of drains must be installed straight 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.

If you follow this guidance, sewage and DIY plumbing can be within the range of the most DIY enthusiasts.

Posted in Drain


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