Blocked Drains in Andover
Andover's mixed housing stock — from Victorian properties to modern builds across SP10, SP11, SP12 and SP13 — relies on a separate sewer system that faces different blockage causes by property age. Older properties often have clay pipes and root intrusion problems; newer builds typically face internal blockages from fats, wipes and hard water scale. Both require different diagnostic approaches, so understanding your property type helps our engineers target the right solution.
Blocked drains in Andover (SP10-SP13) typically stem from hard water scale, root ingress in Victorian clay pipes, and misconnections in the separate sewer system. High flood risk increases sewer backflow vulnerability. Our engineers clear blockages and advise on non-return valve installation for flood protection.
Drainage in Andover — what local engineers know
Andover, in Test Valley, is served by Southern Water but faces specific drainage risks. Hard water causes limescale buildup in soil pipe joints across SP10 and SP11 postcodes. The separate sewer system makes misconnections a known issue — washing machines or dishwashers plumbed into surface water drains trigger environmental enforcement. With High flood risk from the River Test, ground-floor properties need non-return valves to prevent sewer backflow. And with a significant share of housing built before 1920, salt-glazed clay pipes and joint failures are common blockage causes.
- Hard water supply causes limescale accumulation in boilers, radiators and soil pipe joints — powerflush and descaling demand is high across Andover
- Separate sewer system across most of Andover: misconnections (e.g. washing machines plumbed into surface water drains) are a known local issue and can result in environmental enforcement action
- With a significant share of properties built before 1920, salt-glazed clay drainage and lead-solder copper pipework are common — pipe collapse, root ingress and joint failure are recurring call-out drivers.
- Andover has Environment Agency flood warning areas nearby along the River Test corridor — basement and ground-floor properties can face sewer backflow during heavy rain; non-return valves are strongly recommended.
What happens when you contact us in Andover
- 1 Immediate dispatch. We find the nearest available engineer covering SP10/SP11 and confirm the ETA before the call ends.
- 2 On-site diagnosis — no guessing. The engineer inspects using professional-grade equipment including CCTV where needed and quotes a fixed price before work starts.
- 3 Job complete, report issued. You receive a written completion report. All work is guaranteed — same fault returns within the guarantee period, we come back free.
Who's responsible for drains in Andover?
In Andover, responsibility for a blocked or damaged drain depends on where the fault sits. As a homeowner you are responsible for the drains within your property boundary that serve only your home. Since the 2011 private sewer transfer, Southern Water is responsible for shared sewers and lateral drains beyond your boundary — even where they run under private land. Road gullies and highway drainage are maintained by Test Valley.
This matters because it determines who pays. If our engineer's CCTV inspection shows the fault is in a shared sewer, we'll tell you — and you can report it to Southern Water rather than paying for the repair yourself. The separate sewer layout that dominates Andover affects where these boundaries typically fall, and our local engineers know the SP10, SP11, SP12 networks well enough to identify ownership quickly.
Blocked Drains prices in Andover
Every Andover job is quoted as a fixed price before work starts — what we quote is what you pay, with no call-out fee for providing the quote. However, the final price depends on access (an external inspection chamber is quicker than internal-only access), the pipe material and condition , and how established the blockage or fault is. Request your free quote and we'll confirm the price and your engineer's ETA in the callback.
In summary, Blocked Drains in Andover is backed by a 12-month workmanship guarantee. Furthermore, every job includes a written completion report. Consequently, you have full documentation if the same fault recurs.