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What to practice when arranging sewer or pipework remedies and set up by yourself







What to practice when arranging sewer or pipework remedies and set up by yourself

Before you undertake DIY plumbing and drains work it is essential to understand the national rules and regulations formulated by the local authority.

You need to explain your work plan in detail to the authority if you wish to install a new drainage system or alter an existing one, the officials will then go through the plan to check if it is in accordance with the rules. However, you will probably not have to inform the Local Authority for replacement of damaged parts or sections of drainage as permission will have already been granted for the initial fitting.

Surface water is basically rainwater. In older properties this can discharged into a foul water drainage system whereas in other properties this can discharged into a soakaway, watercourse or a surface water sewer. Air escape from the drains is stopped when rainwater pipes are discharged into the foul water drains through gully traps in an older combined system. Nowadays hygiene and recycling considerations have led to a mandatory separation of surface water and sewage water. Rainwater and foul water sewage should not be interconnected, however convenient it may seem. If you have doubts about your house’s drainage 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. Keeping the path as straight and short as possible will be the main concept behind the design of the waste passageways or pipes. Steep pipes should be avoided during the path design. Using surveyor’s site level you can calculate the fall of a drain over a distance to check the values. In the absence of one of these, create a datum point and set levels with a hosepipe filled with water and compute the fall from the datum in this manner.

You need to ascertain that the foundations and structure of the house is safe when digging to install your drain trench. Keep the drain excavation at a uniformly safe distance from the home face to avoid damage to the substructure.

When fitting in a new sewage system, you should not dig the trench too long before placing the pipe as the trench could collapse. Make sure that you get the pipes laid as quickly as possible and then backfill the trench as soon as the system has been inspected and tested.

Depending on the depth and soil conditions, the trench may require support. Avoid risks when working in the ditch. If you are not entirely confident of the stability of the ditch you should add support. You must make the ditch as narrow as possible while leaving enough room to work inside it. Be sure to remove any stones or bricks from the ditch bed and make it as even as possible. If the exiting material is not suitable then you may need to import a suitable material for the base of the ditch.

Bricks and/or any other sturdy material should never be used to prop up the pipe in the ditch. In fact they should be never used as support as they can damage the pipe as they will focus pressure into a small area. The bedding should be made compact to fit around the pipe joints. A good guideline is that support should be provided for the entire length of the pipe.

It is very important that the design of the sewage system should be constructed in such a way that all parts of the pipework are accessible to a set of drain rods for future maintenance. So that is why a run of drains should be as straight as possible between two points or inspection chambers. 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.

Following this guide you can see that DIY plumbing and drainage can be delivered by conscientious DIY enthusiasts.

Posted in Drains


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