How We Replaced Old Drain Pipes with Incorrect Fall for a Dorset Homeowner
When Mr. Thompson from Weymouth contacted us about recurring drainage problems at his Victorian property, we knew this would be more than a simple blockage. This case study demonstrates how incorrect drain pipe gradients can cause persistent drainage issues and why professional drain installation in Dorset requires expert knowledge and precision.
The Initial Problem: More Than Just a Blockage
Our client had been experiencing slow-draining sinks, gurgling sounds from plug holes, and occasional unpleasant odours for several months. Despite multiple attempts at clearing the drains himself, the problems kept returning within weeks. These are classic warning signs of drainage problems that go beyond simple blockages.
When we arrived at the property, we discussed costs upfront as part of our honest pricing service, ensuring Mr. Thompson knew exactly what to expect before any work began.
CCTV Drain Survey Reveals the Root Cause
Rather than simply attempting another clearance, we recommended a comprehensive CCTV drain survey to identify the underlying issue. Our advanced camera equipment allows us to assess pipework without any digging, providing clear video evidence of drainage problems.
The survey revealed what we suspected: the original Victorian pipework had been incorrectly installed with insufficient fall (gradient). According to UK building regulations, drainage pipes require specific gradients to ensure proper water flow. The existing pipes had a gradient of less than 1:80, far below the recommended minimum of 1:40 for 100mm diameter pipes.
Understanding Pipe Fall and Its Importance
Drainage pipes need the correct gradient to allow waste water to flow efficiently whilst carrying solid waste along. Too shallow a gradient causes water to move slowly, allowing debris to settle and accumulate. Over time, this creates recurring blockages and can lead to more serious problems including:
- Standing water in pipes
- Bacterial growth and bad odours
- Increased risk of pipe damage from built-up pressure
- Regular blockages requiring frequent clearance
Our Solution: Complete Drain Pipe Replacement
After presenting our findings to Mr. Thompson with full video evidence from the CCTV survey, we recommended replacing the affected section of underground drainage pipes. The work involved:
1. Careful Excavation
We carefully excavated the affected area in the rear garden, minimising disruption to the landscaping and patio area.
2. Removal of Old Pipework
The original clay pipes, installed over 100 years ago, were carefully removed. These older systems often suffer from incorrect installation as building standards were less rigorous in Victorian times.
3. Installation of Modern PVC Pipes
We installed new PVC underground drainage pipes at the correct gradient of 1:40, ensuring optimal flow rates. Modern materials offer superior durability and smoother internal surfaces that resist blockage formation.
4. Testing and Verification
After installation, we conducted flow tests to verify proper drainage and performed another CCTV survey to document the completed work.
The Results: Long-Term Drainage Success
The transformation was immediate. Water now drains quickly and efficiently from all fixtures, with no gurgling sounds or unpleasant odours. Mr. Thompson was particularly impressed that we completed the entire project within two days, restoring his garden to its original condition.
Preventing Similar Problems in Your Dorset Home
If you’re experiencing recurring drainage issues, they might indicate incorrect pipe fall rather than simple blockages. Watch for these warning signs:
- Water draining slowly despite regular cleaning
- Gurgling sounds from multiple drains
- Recurring blockages in the same location
- Bad smells that persist after cleaning
- Water backing up during heavy rainfall
Our drain repair services across Dorset include comprehensive diagnostics to identify whether you need simple repairs or complete pipe replacement.
Why Choose Professional Drain Installation in Dorset
This case highlights why professional expertise matters for drainage work. Incorrect installation can lead to years of problems and expensive repeated callouts. At Elite Drainage Services, we ensure every installation meets current building regulations and is built to last.
We provide 24/7 emergency drain services across Dorset, Hampshire, and surrounding areas, with no call-out fees. Whether you need a pre-purchase survey, routine maintenance, or complete drain installation, our vetted engineers deliver professional results with friendly service.
If you’re experiencing similar drainage problems or need expert drain installation in Dorset, contact us today for a free consultation. We’ll assess your drainage system properly and provide honest, upfront pricing for any necessary work.
