Overview of drain pipes set up







Overview of drain pipes set up

Local building laws and procedures have to be complied with whenever you carry out sewage or pipework repairs and fitting by yourself.

If you are considering altering your existing drainage, or installing a new drainage system you will almost certainly need to present some detailed plans of the work that you intend to undertake and it will need to be inspected as the work progresses making sure that it complies with the local building regulations. However you do not require authority approval for replacement of failed joints or cracked plumbing and drains pipes.

The water which you see on the surface is basically rain. It can drain out through a soakaway, watercourse, surface water sewer or, especially in older houses, into the dirty water drainage pipes. 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. But modern systems are especially created so that dirty water and surface water remain separate. Foul water should never be connected to surface water drainage system with any new sewage development you undertake. If you have doubts about your house’s drainage system, you can get help from the Building Control Department before you begin any work.

The first thing to do in a DIY drainage replacement job is to decide the position and level of the waste pipework. Have an eye to future care 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. 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 drainage trench is being installed so check you are not impacting on the existing structure. The foundation of the building should not be undermined by your digging if the drainage runs parallel to it.

When fitting in a new sewage system, you should not dig the ditch too long before placing the pipe as the ditch could collapse. The pipes should be laid quickly and the trench back filled after the system has been examined thoroughly and tested as required.

Be wary of the depth and soil conditions and if necessary add extra support to the ditch. Take he utmost care when doing this work. If in doubt add support to the ditch to prevent it from collapsing. The excavation should be only as wide as required, but should also permit the fitter to work conveniently. Ensure that the ditch bottom is flat and free of stones, tree roots and soft spots. You may have to bring in the right type of material for the bottom of the trench if the one that’s already there is not proper.

You should definitely not use hard materials such as bricks to support the pipe in the trench. Such hard objects will cause the poorly supported pipe to bend or break and the joints will eventually fail. The material used for bedding should be firmly compacted down with a depression created to allow the joints in the pipes to fit easily. You will need to provide a continuous and uniform support for the complete length of the pipe.

The drainage system should be designed in a way that pipework remains accessible to drain rods should drainage maintenance work be required. Which means that a run of drains must be installed straight between two points. Inspection chambers have to be provided at any sudden changes of direction or level, so that drain rods can be inserted easily.

DIY plumbing and sewage is certainly within the bounds of most DIY enthusiasts.

Posted in Drains


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