Autumn Drain Maintenance Exmouth | A Ten Minute Check

Exmouth gets about 850 mm of rainfall a year, and a disproportionate chunk of it arrives between October and February. That's fine if your drainage is moving freely. It's not fine if a gully grate is buried under a mat of wet sycamore leaves and the water has nowhere obvious to go except your path, your neighbour's path, or your kitchen extension.

This check takes roughly ten minutes on a dry afternoon. Do it now, before the Atlantic systems start queuing up off Cornwall.

What you're actually looking for

Leaves don't block drains the way grease or roots do. They compact into a wet mat, sit on top of a grate, and redirect surface water sideways. They also break down into a silty slurry that washes through and accumulates in low points of the pipe, creating a partial restriction that you won't notice until it's raining hard enough to matter.

The checks below cover the four places where autumn debris causes the most grief on Exmouth properties.

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Check 1: Gully grates (front and back)

A gully grate is the small cast-iron or plastic grid, usually set into the path or patio, that catches surface water before it enters the underground drain. Lift it or crouch down and look.

What good looks like: The grate is clear. Below it, the gully pot (the cylindrical chamber underneath) has a water trap at the bottom but isn't filled up to the grate with leaf mulch.

What bad looks like: A solid plug of compacted leaves sitting across the grate. Sometimes it's almost architectural, a perfect circle of brown slop.

What to do: Glove up, pull the debris out, bag it for your green bin. Then shine a torch into the gully pot. If the pot is more than half full of silty sediment, it needs clearing properly, either with a gully rod or a call to us. A blocked gully pot is invisible from the surface and won't reveal itself until the next heavy shower.

Properties in Withycombe Raleigh and Littleham with mature sycamores nearby will typically have a full gully pot by late October. It's not a surprise. It's just autumn.

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Check 2: The leaf trap (if you have one)

Some properties, particularly in Brixington and the older terraces near Phear Park, have a simple plastic or metal leaf trap fitted to a downpipe at ground level. It's the cage-like thing you've probably never thought about.

• Check it's not packed solid. If it is, clear it by hand.
• Make sure the outlet at the base isn't sealed shut by debris.
• Refit it securely. A loose leaf trap does nothing.

If you don't have a leaf trap and you have deciduous trees overhead, they're a cheap retrofit worth considering. Catch the leaves above ground rather than underground.

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Check 3: Downpipes and the back-of-house gully

The downpipe connects your guttering to the underground drain, usually via a gully at the base of the wall. This junction is where things go wrong quietly.

The downpipe itself: Stand back and watch a downpipe during or just after light rain. Water should flow out at the base smoothly. If it's dribbling, the pipe is partially blocked, often with a compacted leaf plug somewhere inside. If it's overflowing at a joint up the wall, that's a broken or displaced section and rain is tracking down the exterior.

The back-of-house gully: This is often the neglected one, tucked behind a bin or a downpipe shoe, invisible from the garden. Pull whatever's in front of it, lift the grid (or look over the top if there's no grid), and check for the same leaf-mat situation as Check 1.

A slow or unresponsive gully at the back of the house is frequently the first sign of a more significant restriction further down the line, a partial root ingress, a displaced joint, a belly in the pipe. Worth noting. If clearing the surface debris doesn't restore normal drainage, that's when a CCTV survey earns its keep.

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Check 4: The slow-drain warning sign inside the house

This one doesn't require going outside at all. Run the bath or fill the kitchen sink, then let it drain. Time it roughly, or just watch.

A healthy 40 mm waste pipe empties a standard bath in two to three minutes. If yours is taking five or six, something's building up downstream. Could be a grease accumulation in the kitchen trap. Could be the beginning of a root ingress in the garden run. Could be a belly, a low point in the pipe where solids settle, quietly growing.

Slow drainage in autumn is easy to dismiss because you're not seeing an overflow. Don't dismiss it. A pipe at 60% capacity during October becomes a pipe at overflow during a November downpour.

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The five-minute check on your manholes

If you know where your inspection chamber (manhole) is, lift the cover with a flat bar and a second person standing clear. Look in.

Don't poke around in there beyond a visual check. You're establishing whether it's clear or not, not diagnosing what's downstream.

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When a ten-minute check becomes a call

Do the check above and you'll catch the straightforward leaf and debris situations yourself. Call a drainage engineer when:

• Clearing the grate or gully pot doesn't restore drainage
• You're seeing slow drainage inside the house without an obvious cause
• The manhole shows standing water or root ingress
• A downpipe is overflowing at a wall joint
• You're in a property where you haven't had a camera survey done and you genuinely don't know what state the pipes are in

That last point applies particularly to landlords. If you've got tenants in a house in Halsdon, Sandy Bay, or anywhere along the EX8 postcode and you don't know the condition of the underground drains, autumn is the time to find out, not mid-January when a tenant calls at 11 pm.

Drainsco covers Exmouth and the surrounding EX postcodes, with engineers available around the clock. No call-out fee. You'll get a clear price before we start anything. If remedial work is needed after a CCTV survey, repairs and relining come with a 20-year guarantee.