Dirt drainage carries used water from toilets, sinks, sinks, bathrooms, showers, bidets, dishwashers and washing machines. Surface piping is called sanitary tubes; underground pipes are called polluted sewers and sewers. Surface water drainage carries rainwater (and melted snow and ice) from hard surfaces. The surface system of gutters and rainwater pipes is called roof drainage; underground pipes are called surface water sewers and surface water channels. In general, a flow serves as a single property, while a canal serves more than one property. There are two drainage systems you need to think about: fault and surface water. In general, these two systems must be maintained separately. To carry the flow and avoid obstructions, the flow or pipe you want to connect to should normally be at least 0.8m below ground floor level. If it`s less than that, you should seek advice from a contractor, architect or drainage engineer. If it is not practical to drain on permeable soil or use a permeable pavement, it is best to keep the surface water on site to avoid an increasing risk of flooding elsewhere. This can be achieved by reaching a Soakaway or some other way to soak it in the ground (called infiltration). The location of rainwater pipes, piles of sanitary pipes and external sewers may indicate where their underground sewers are likely to pass through. The sanitary pipes must be ventilated so that air escapes from the pipes and sewers in the building.
This section has been written for owners who might consider building an extension or making changes. It describes the most important impact drainage can have on your project. If you decide to continue your project, your contractor will need to consult the approved H document in order to obtain detailed information on compliance with the building rules. Additional rainwater pipes may be discharged onto the ground or into new or existing underground pipes. If you decide to let rainwater pipes drain onto the ground, you must ensure that the water does not damage the foundations (z.B. by encouraging it to spread over a large area) or drain over nearby land (for example. B by A light lip at the border). A larger roof area increases the amount of surface water. It is best to maintain the additional volume on site to avoid an increasing risk of flooding elsewhere. Rainwater can be kept on site using a moving type or other means to soak it in the soil (called infiltration), or be stored and used for flushing toilets or garden irrigation (known as rainwater harvesting). Approved H provides advice on where soakaways are set up, their size and how they should be built. The normal way to do this is to extend the piping (known as the ventard) outwards, so that the end is open (but protected by a net to prevent birds).
To prevent odours from entering a building, the open end of the ventilation hose must be extended by at least three metres to the side or up to 0.9 m above an opening in a building. Public sewer maps can be accessed free of charge at the butcher`s or local authority`s offices. Private sewers and sewers are generally not mapped and their location should be found in another way, as described below. Flow covers indicate exits. By lifting the lid, it may be possible to see the direction, size and depth of the pipes, but not enter the chamber (which can be filled with toxic gas) and ensure that the cover is replaced safely. The pipes must be sized for the flow of water to minimize the risk of obstruction and allow air movements. Indications on the size of the pipes are available in the approved document H. If you intend to build a public channel or be nearby, you need written consent from your waterer