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Curran Drainage Services engineers on site — Drainage Guides

Drainage Guides

Straight answers to the questions we get asked on the phone every week, written by the engineers who do the work across West Lothian, Edinburgh, Falkirk, Lanarkshire and Fife.

Why Does My Drain Keep Blocking?

If a drain clears and then blocks again within a few weeks, the blockage was never the real problem. Something in the pipe is catching waste every time it passes. Here is what we usually fin...

Toilet Not Flushing or Backing Up: What to Check First

A toilet that fills to the rim and drains away slowly is telling you something is restricting the pipe. Where the restriction sits decides whether this is a five minute job or a drainage cal...

Blocked Outside Drain: What You Can Safely Do Yourself

An outside gully or chamber that is overflowing is unpleasant but often straightforward. Some of it you can deal with yourself with gloves and a bucket. Some of it you should not touch. This...

Signs of a Collapsed Drain

A collapsed drain rarely announces itself. It shows up as a series of smaller annoyances that people put up with for months. Catching it early is the difference between a patch liner and exc...

Who Is Responsible for a Blocked Drain in Scotland?

This is the question we are asked most, and the answer decides who pays. The general principle in Scotland is simple: the pipework that serves only your property is yours to maintain, and th...

What a CCTV Drain Survey Shows and What It Costs

A CCTV drain survey puts a camera through the drainage run so you can see the condition of the pipe rather than guess at it. People book one for three reasons: they are buying a property, a ...

Pre-Purchase Homebuyer Drain Surveys Explained

A standard home report or building survey does not put a camera in the drains. It notes what is visible and recommends a specialist inspection if anything looks doubtful. If you are buying, ...

Drain Repairs: Patch Lining, Relining and Excavation Explained

Once a CCTV survey has found a defect, the next question is how to repair it. There are three broad answers, and the right one depends on how much of the original pipe is still there. Here i...

Root Ingress in Drains: Causes, Removal and Prevention

Roots do not break into a sound, sealed pipe. They find an existing defect, usually a hairline crack or an open joint, follow the moisture and then grow inside where there is water, air and ...

Smells Coming From Drains: What Causes Them

Foul air sits in every drain. It only reaches you when something that should be holding it back has failed, and there are only a handful of things that can be. Working through them in order ...

Drain Unblocking Cost: What Actually Drives the Price

Nobody can give an honest fixed figure for a blocked drain sight unseen, because two jobs that sound identical on the phone can take twenty minutes or half a day. What we can do is set out e...

Drain Survey Cost: What You Are Paying For

A survey price is not just camera time. Most of the value sits in what you get afterwards, and reports vary enormously between contractors. Here is what changes the figure and what a report ...

Drain Repair and Relining Cost Explained

Repair pricing follows the method, and the method follows the pipe. Once a camera has shown what the defect is and where it sits, the options narrow quickly and the cost becomes predictable....

What Happens if a Drain Survey Finds a Problem

Most surveys find something. Very few find something that stops a sale or needs work that week. The useful question is not whether a defect exists but which category it falls into, and a dec...

Blocked Drain Emergency: What to Do First

A drain that has stopped completely does not give you much thinking time. Waste water has nowhere to go, so it looks for the lowest opening it can find, and in most Scottish homes that is a ...

How to Unblock a Sink or Waste Pipe

Most slow sinks are blocked within a metre of the plughole, which is why a careful half hour with a bucket and a screwdriver clears a good proportion of them. The trick is working in the rig...

Blocked Drains After Heavy Rain

A drain that behaves perfectly for weeks and then floods the moment there is a downpour is telling you something quite specific. The pipe has enough capacity for normal use but not enough fo...

What Not to Put Down Your Drains

Almost every blockage we clear in a domestic property is made of the same few things, and none of them are exotic. Understanding why each one causes trouble is more useful than a bare list, ...

Gurgling Drains and Slow Plugholes

Gurgling is the sound of air being pulled through water where it should not have to be. In a healthy drainage system, air moves freely through the vent at the top of the soil stack and water...

Your CCTV Drain Survey Report Explained

A CCTV survey report can look impenetrable the first time you open one. There is footage, a run of abbreviations, measurements to the nearest tenth of a metre and a set of grades. Underneath...

Drain Tracing and Mapping Explained

Very few older properties in central Scotland have accurate drainage plans. Runs were laid, extensions were added, garages were built over the top and nothing was recorded. Drain tracing is ...

Landlord Drain Surveys in Scotland

Drainage sits squarely inside a Scottish landlord's repairing obligations, and it is one of the few building elements where a tenant can create a fault, a landlord pays for it, and neither p...

Pre-Purchase Drain Survey: A Buyer's Checklist

Scottish home reports do not cover private drainage in any meaningful way. The surveyor lifts nothing, sees nothing below ground and will typically note that drainage was not inspected. Sinc...

Drain Surveys for Insurance Claims

Buildings insurance in the UK commonly includes cover for underground services, and drainage claims are frequently settled, but they are also frequently refused. The difference usually comes...

Drain Relining Explained

Relining is the reason a broken drain under a driveway no longer automatically means digging up the driveway. A resin impregnated liner is drawn into the existing pipe, inflated against the ...

Patch Lining or Full Relining: Which Do You Need?

Both are no dig repairs and both use the same principle, but they solve different problems. Choosing badly in either direction is expensive: a full liner where a patch would do wastes money,...

Tree Roots in Drains: Removal and Prevention

Root ingress is one of the most common findings on any survey of older drainage, and one of the most misunderstood. Roots do not drill through sound pipe. They find a defect that already exi...

Collapsed Drain Repair: What to Expect

A collapse is the point at which the pipe has lost its shape rather than simply cracked. It is the most serious thing a survey can find, but it is also a well defined problem with a well def...

Excavation Drain Repair Explained

No dig methods have made excavation much less common than it once was, but they have not made it obsolete. There remain faults that can only be fixed by removing the pipe and laying a new on...

Drainage Regulations in Scotland Explained

Drainage in Scotland is governed by a different set of rules from England and Wales, and the differences catch people out regularly. Three bodies matter: your local authority for building st...

Septic Tank Maintenance in Scotland

A septic tank does not treat sewage so much as separate it. Solids settle, fats float, and the liquid in the middle passes out to a soakaway where the soil does the actual treatment. Almost ...

Soakaways and Surface Water Drainage

Surface water has to go somewhere, and in much of central Scotland it cannot simply be piped to a sewer. Soakaways are the usual answer, and they work well when they are sized for the roof a...

Grease Management for Commercial Kitchens

Every commercial kitchen produces fats, oils and grease, and every drainage failure in hospitality that we attend is caused by them. The pattern is always the same: the run copes for a coupl...

Planned Commercial Drainage Maintenance

For a commercial site, the real cost of a drainage failure is rarely the invoice. It is the closed kitchen, the shut toilets in a retail unit, the lost trading evening, the complaint to envi...

Emergency Plumber or Drainage Engineer: Who to Call

A wet floor does not tell you whether the fault is in a water supply pipe or a drain. That distinction matters: a burst supply pipe keeps feeding water into the room, whereas a blocked drain...

How to Choose a Drainage Contractor in Central Scotland

A drainage contractor can clear a pipe, film it, repair it or maintain it. Those are different jobs, and the right questions depend on which one you need. If you are comparing firms after a ...

24-Hour Drain Unblocking: What Happens on a Call-Out

An out-of-hours drainage call is not simply someone arriving with rods. The useful part is locating the restriction, clearing the right length of pipe and checking whether the flow is restor...

Blocked Bath or Shower Drain: Causes and Fixes

A bath that empties slowly and a shower that leaves a puddle are often grouped together as blocked drains. Before using any cleaner, work out whether the restriction is at the plughole, alon...

Burst Pipe: What to Do Before the Plumber Arrives

A burst water pipe is different from a blocked drain: water can keep entering the property even when nobody is using a tap. The useful first move is to limit the supply, not to try to mend a...

How Long Does a Drain Survey Take?

A straightforward drain survey on a typical house is usually finished in a single visit, often within a morning or an afternoon. What stretches the time is not the camera itself but access: ...

Do I Need a Drain Survey? When It Is Worth Booking

You need a drain survey when you want to know the condition of a pipe you cannot see, rather than just get water moving again. If a drain has blocked once for an obvious reason and now runs ...

No-Dig vs Excavation Drain Repair: Which Do You Need?

Most cracked, leaking or root-damaged drains can be repaired without digging, using a liner fitted from inside the pipe. Excavation is still needed when a pipe has collapsed, lost its shape ...

How Long Does a No-Dig Drain Repair Take?

A single patch repair on an accessible domestic drain is normally completed in one visit. The time on site depends far more on preparation than on the liner itself: the pipe has to be cleane...

Drain Jetting vs Rodding: Which Clears a Blockage Better?

Rodding pushes or breaks a blockage so water can pass again; high pressure water jetting scours the inside of the pipe and flushes the debris away. For a simple soft blockage near a chamber,...

How Long Does It Take to Unblock a Drain?

Most domestic drain blockages are cleared in one visit once the engineer has access to the right chamber. Simple blockages caused by wipes, paper or food waste can be quick. Hardened grease,...

How Often Should Drains Be Cleaned?

Most homes do not need their drains cleaned on a fixed schedule; they need cleaning when there are signs of build-up, such as slow drainage, gurgling or smells. Busy commercial kitchens, pub...

Blocked Toilet and the Plunger Is Not Working: What Next?

If a plunger will not clear a blocked toilet, the blockage is probably further down the pipe than a plunger can reach, or it is something solid that will not break up. The next step is to ch...

Emergency Plumber Cost: What Affects the Price

Emergency plumber cost is one of the first things people search for with water on the floor, and it is one of the hardest to answer in a single figure. The price of an urgent visit depends f...

Drain Jetting Cost: What Decides the Price

Drain jetting cost is hard to pin down from a price list, because the same machine can spend ten minutes on one drain and most of a day on another. What you pay depends on the pipe, what is ...

Drain Fly Guide: Why They Appear and How to Get Rid of Them

If you keep seeing tiny, fuzzy, moth-like insects resting on the bathroom wall or hopping out of a plughole, you almost certainly have drain flies. A drain fly is harmless in itself, but it ...

Build Over Agreement in Scotland: Building Over a Drain

Search for build over agreement and most of what you find describes the English process run by water companies such as Thames Water or Severn Trent. In Scotland the rules are different. Ther...

Sewer Smell in Bathroom? Finding a Sewage Smell in the House

A sewer smell in the bathroom is one of the most common reasons people ring a drainage firm, and one of the most frustrating to live with, because the room can be spotless and still smell. I...

Drain Cleaning Chemicals: Are Chemical Drain Cleaners Safe?

Drain cleaning chemicals are the first thing many people reach for when a sink or shower slows down. Sometimes they help with a light build-up near the plughole. Often they do not, and on a ...

Pitch Fibre Drains: Problems, Surveys and Relining

If your house was built roughly between the 1950s and the 1970s, there is a fair chance some of its underground drains are pitch fibre. The material was cheap, light and quick to lay, and it...

Does Home Insurance Cover Drains?

Most people only ask whether home insurance covers drains once something has gone wrong. The answer depends on three things: which kind of cover you hold, what happened to the pipe, and who ...

Need help with a drainage problem?

Professional drainage services designed to resolve drainage issues quickly and efficiently. From emergency drain unblocking and blocked drains to CCTV surveys, drain repairs, and commercial drainage services, Curran Drainage Services provides dependable support for homes and businesses throughout Central Scotland.

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