Blocked Soil Stack Pipe Unblocking
Fixing Multiple Blocked Drains Fast — Trusted Since 1986
Are your toilet, shower, and sinks all draining slowly or backing up? You likely have a blocked stack pipe. Get expert help today.
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24/7 Soil Stack Unblocking Services in London & Hertfordshire
A blocked soil stack is a serious emergency, disabling multiple bathrooms and kitchens at once. Get a rapid, fixed-price solution from our expert engineers. We use specialist equipment to clear blockages in main stack pipes for homes and businesses across London and Hertfordshire, restoring full flow and hygiene to your property. No call-out fees, no hidden costs.
Your Local 24/7 Engineers in London & Hertfordshire
When your property’s main waste pipe is blocked, you need fast, local help. We have dedicated engineers serving: All London Boroughs (including North, South, East & West London) and Hertfordshire (including Watford, St Albans, Hemel Hempstead, Stevenage, and surrounding areas).
Signs of a Blocked Stack Pipe
A blockage in your main vertical soil stack affects every drain connected to it. It’s different from a single blocked sink. Call our experts immediately if you notice:
Multiple Blocked Fixtures: The most common sign. A toilet, sink, and shower are all backing up or draining slowly at the same time.
Gurgling Drains: When you flush the toilet, you hear gurgling sounds from the shower or sink plughole as trapped air tries to escape.
Rising Water Levels: Flushing an upstairs toilet causes the water level in a downstairs toilet to rise.
Foul Odours: Unpleasant drain smells appearing in your bathrooms or kitchen, indicating trapped waste is decaying in the pipework.
Wastewater Backup: The worst-case scenario, where waste from an upper floor backs up into a ground-floor shower, bath, or toilet.
These symptoms point to a central blockage that DIY solutions cannot fix. Our emergency team is ready to help 24/7.
What is a Soil Stack Pipe?
The soil stack, or soil vent pipe (SVP), is one of the most important pipes in your property.
It’s the large-diameter vertical pipe that runs from above your roofline down to the underground drains.
Its job is to safely carry all wastewater and solids from your toilets, sinks, showers, and baths away from your home, while also allowing foul air to be ventilated out above the roof.
When this single pipe gets blocked, the entire property’s drainage is compromised.
Electro-Mechanical Cleaning (EMC)
For internal blockages, we often use high-speed, flexible cables with rotating cutting heads. This equipment is fed into the pipework to grind away scale, cut through wet wipe masses, and clear the blockage without the need for high-pressure water inside your home.
What to Expect From Our Stack Unblocking Service
Our process is designed to resolve your drainage emergency quickly and cleanly:
Call Us 24/7: Explain the problem, and we’ll dispatch an emergency engineer.
Get a Fixed Price: We provide a clear, fixed price to unblock the stack before work begins.
Expert Diagnosis & Unblocking: Our engineer will identify the best access point and use the most effective equipment (EMC or jetting) to clear the pipe.
System Fully Tested: We don’t just leave. We test multiple fixtures (toilets, sinks) throughout your property to confirm that flow is fully restored before we go.
Call Now For Your Blocked Stack Emergency.
Available 24/7, Fixed Price & No Callout Charge.
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Testimonial
Drain 247 mapping saved our project from delays. Clear plans, fast service!”
— John S, Architect, London
Why Choose Drain 247 for a Blocked Stack?
Fast Emergency Response: A blocked stack is a hygiene emergency. We prioritise these calls to protect your property and restore your facilities as quickly as possible.
Fixed, Honest Pricing: Even in an emergency, you’ll get a clear price upfront. No call-out fee, no hidden charges, ever.
Specialist Equipment: We carry both electro-mechanical cleaners for internal work and powerful jetters for external pipes, ensuring we have the right tool for the job.
Clean & Tidy Working: Our engineers are trained to work cleanly and respectfully within your home, using dust sheets and taking every precaution to leave your property as they found it.
Experienced Engineers: We can quickly diagnose the difference between a simple toilet blockage and a more serious stack pipe issue, saving time and ensuring a first-time fix.
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42-44 Clarendon Road, Watford, Hertfordshire, WD17 1JJ
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Frequently Asked Questions
Why are my toilet and shower blocked at the same time?
This is the classic symptom of a blocked main stack pipe. Because both fixtures feed into this single vertical pipe, a blockage in it will affect everything connected, especially on lower floors.
What is the number one cause of blocked stacks?
Flushing non-flushable items is the primary cause. Wet wipes, sanitary products, nappies, and even kitchen roll do not break down and will snag inside the pipe, causing a major build-up.
Is it messy to unblock an internal stack pipe?
No. Our engineers are experts at working inside properties. We use methods like electro-mechanical cleaning which are self-contained and take all necessary precautions to ensure the work area is kept clean and tidy.
How can I prevent my stack pipe from blocking?
The best prevention is to only flush the three P’s: pee, poo, and (toilet) paper. Be careful to scrape plates and avoid washing fat, oil, or grease down the kitchen sink. Using drain catchers in showers and sinks also helps.
Do you need to access the pipe inside my house?
This depends on where the blockage is located. Our engineer will assess the situation and find the best, least disruptive access point, which could be an external inspection chamber or an internal access point. We will always explain the process to you first.