We offer an supply and installation service for both. There are no published reviews for this product. Needing to order online? fill out our. A drain is classed as a single pipeline, which conveys foul sewerage or surface water from a single property a drain is still a drain even if it goes past the boundary of your property until it joins a sewer it is the responsibility of the owner-occupier to maintain and clear a private drain where problems occur to your own drain,.