How blocked drains are cleared
Drain clearance depends on the pipework, the location of the blockage and what is restricting the flow. Rods, mechanical drain cleaning and high pressure water jetting are common methods for clearing obstructions. Grease, food waste, wipes, silt and other debris can accumulate in drainage pipes, although the cause cannot always be established from the symptoms alone.
Where suitable, drain jetting for blocked drains can remove deposits from inside a pipe and help restore the flow. Access to the drain and the condition of the pipework influence which clearance method is appropriate. If the problem returns, further investigation may be needed to establish whether there is an underlying drainage fault.
Blocked drains in Edinburgh tenements
In a tenement, drainage from several flats may pass into a shared soil pipe or common underground drain. A blockage further along that pipe can cause wastewater to back up at a lower level, sometimes appearing first in a ground-floor toilet or shower. That does not necessarily mean the ground-floor flat caused the problem or that the affected pipe serves only that flat.
Access to the common drain may be through a chamber in the back green, a shared yard or another part of the property. Establishing which section is affected helps owners and property factors understand whether the problem concerns an individual branch or shared drainage.
Responsibility for common repairs depends on the title deeds and the applicable Scottish tenement rules. The Tenement Management Scheme provides rules for maintenance decisions and cost sharing where the title deeds do not adequately cover those matters. The City of Edinburgh Council Shared Repairs Service also provides advice to private owners arranging communal repairs.
Our block management drainage services page explains drainage issues affecting factors and managed residential buildings.
Private drains and Scottish Water responsibility
In Scotland, the responsibility for a blocked drain often depends on where the affected pipe sits in relation to the property boundary. Scottish Water’s guidance explains that a drain generally becomes a public sewer when it leaves the property’s curtilage or joins drainage from a separate curtilage. Shared drains within the curtilage of a block of flats may remain private.
This means a blocked drain beneath a tenement or its shared back green can be the owners’ responsibility, while a blockage in the public sewer is generally a matter for Scottish Water. The exact drainage layout matters, especially where pipes from different properties meet.
See who is responsible for blocked drains for further guidance, or consult Scottish Water’s guide to drains and sewers, which includes examples of private and public drainage arrangements.
