Blocked Drains in Plymouth What Causes Them, and How to Stop It Happening Again

A blocked drain can ruin your day — or your whole week if left unchecked. One minute your kitchen’s fine, and the next you’re ankle-deep in dirty water. Whether you’re in a new-build in Saltash or an older terrace in Efford, drain blockages hit hard and fast when you least expect them.

At Drainblock Services, we’ve responded to thousands of callouts across Plymouth and surrounding areas. And while no two blockages are exactly the same, we’ve noticed a pattern in what causes them — and what prevents them. Here’s everything Plymouth homeowners should know about why drains block, how to fix it quickly, and what to do to stop it happening again.

Top 5 Causes of Blocked Drains in Plymouth Homes

How to Spot a Blocked Drain Early

• Gurgling sounds from plugholes or toilets
• Slow drainage in sinks, showers, or baths
• Foul smells near sinks or outdoor drains
• Raised water levels in the toilet
• Overflowing gully or manhole covers

Quick Fixes You Can Try First

1. Pour boiling water and washing-up liquid down the kitchen sink to break down grease
2. Try a plunger on toilets and sinks with slow drainage
3. Use a bent wire hanger to hook out hair and debris from bathroom plugholes
4. Mix half a cup of bicarbonate of soda with a cup of vinegar — let it sit, then rinse with hot water

If those don’t work — or if the problem keeps coming back — it’s time to call in professionals.

Why Some Blockages Keep Coming Back

If you’ve ever had a drain cleared, only to find it blocking again a few weeks later — you’re not alone. We see this a lot in Plymouth’s older districts, especially in places like Efford and Torpoint where ageing clay pipes and historic layouts still dominate the underground network. There are usually three reasons why drains re-block:

• The blockage was never fully cleared — basic rodding or drain cleaner might shift the surface obstruction, but not the underlying build-up. Grease and limescale can stay behind and re-form quickly.
• There’s a deeper structural issue — cracked joints, misaligned pipes, or hidden sags (“pipe bellies”) in the line can trap debris and allow waste to build up over time.
• DIY chemicals caused more harm than good — overuse of harsh chemical unblockers can damage pipe linings or corrode joints, making blockages more likely in future.

That’s why we often recommend a CCTV drain inspection after the third callout in any six-month period. It helps catch what rods and guesswork can’t — so you can fix it once and for all.

“A £7 bottle of over-the-counter drain foam caused a full chemical reaction in old cast iron pipework — leading to corrosion and complete pipe replacement.”

When Chemical Drain Unblockers Do More Harm Than Good

We understand the temptation to “just pour something down it.” But in many cases, home remedies can actually make things worse. Caustic soda can cause heat damage to older PVC pipework. Repeated plunging might force a blockage deeper into a collapsed section of pipe. And mixing multiple cleaning products? That’s not just ineffective — it can be dangerous.

We’ve even seen cases in Saltash where over-the-counter drain foam caused a full chemical reaction in old cast iron pipework, leading to corrosion and complete pipe replacement. A £7 bottle ended up costing hundreds.

Professional Equipment Makes the Difference

When our team arrives on site, we come prepared — not just with a plunger, but with high-pressure jetting kits, CCTV systems, root cutters, and pipe repair gear. We don’t just move the blockage — we find out why it formed in the first place. We start with a visual inspection to identify the likely source, use rods or high-pressure jetting to remove blockages safely, offer CCTV surveys for deeper problems, and once cleared, explain the cause and how to avoid it recurring.

Real Case: Repeat Blockages in Efford Solved for Good

A family in Efford had recurring toilet blockages. They’d tried chemicals and plunging, but it kept returning. We surveyed the pipe with a camera and found a root system growing through a cracked joint. After cutting back the roots and installing a patch liner, the problem was resolved permanently.

Prevention Tips Every Plymouth Household Should Know

• Use sink strainers to catch food and hair
• Never pour fat or oil down the drain
• Keep a bin near the toilet for wipes and sanitary items
• Run hot water down kitchen drains weekly
• Book annual jetting or inspections if your home is older or prone to tree root issues