Are emergency drainage engineers available at weekends in UK? +
Yes, most emergency drainage services covering UK operate 7 days a week, including weekends and bank holidays. Sewage backups and flooding drains are genuine emergencies that cannot wait until Monday. Expect to pay a premium of around 25% to 50% for weekend and out-of-hours call-outs compared to weekday rates.
Can I build over an existing drain on my property? +
Building over or near a public sewer requires a Build Over Agreement from your water company. For private drains, you do not need permission but you must ensure the drain remains accessible for maintenance. Building Regulations require that drains under or near buildings are adequately protected. A CCTV drain survey before and after construction is strongly recommended to prove the drain's condition.
Who is responsible for drains — me or the water company? +
You are responsible for private drains within your property boundary. Since October 2011, lateral drains (the section that runs from your boundary to the public sewer) and the public sewer itself are the responsibility of your local water company. If a blockage is beyond your property boundary, contact your water company first — they will clear it at no charge. A drainage engineer in UK can help identify where the blockage is.
How often should I have my drains surveyed? +
For most domestic properties, a CCTV drain survey every 3 to 5 years is sufficient to catch problems early. If you have mature trees near your drains, older clay pipes, or a history of blockages, consider annual surveys. You should also commission a drain survey before buying a property — it can reveal expensive problems like collapsed sections or root intrusion that are not visible from the surface.
What causes a foul smell from my drains in UK? +
Foul drain smells are usually caused by a dried-out trap (the U-bend), a cracked or disconnected pipe, or a blockage building up in the system. If the smell is coming from outside, it could indicate a broken manhole cover seal or a collapsed section of drain. Run water through any infrequently used sinks or showers to refill their traps first. If the smell persists, a CCTV drain survey will identify the cause.
What equipment should a professional drainage engineer have? +
A properly equipped drainage engineer should have high-pressure water jetting equipment (typically 3,000+ PSI), a CCTV drain camera for surveys, electro-mechanical cleaning machines, drain rods, and root cutting attachments. They should also carry personal protective equipment (PPE) including gloves, eye protection and waterproof clothing. Be wary of anyone who turns up with just a set of drain rods — they will struggle with anything beyond a minor blockage.