High Wycombe is the steepest town TrueFlow works in. The centre sits on the floor of a narrow Chiltern valley, and nearly everything built since has had to climb: Victorian terraces stepped up the valley sides, estates on the hilltops, flats where the furniture works once stood. For a Buckinghamshire town of its size, that leaves very little plumbing that runs conveniently flat.
TrueFlow is a plumbing and drainage firm based in Bracknell, covering High Wycombe’s HP11, HP12 and HP13 postcodes. Phones are answered 24 hours a day, 365 days a year, every job carries a 6-month guarantee, the firm is fully insured, and the exact price is agreed before any work starts.
The chair town, and the streets it built
High Wycombe’s shape is a product of its furniture century. Windsor chair making grew from a woodland craft into the town’s largest employer by the 1840s, and at the trade’s peak in 1875 around 150 factories and workshops were turning out an estimated 4,700 chairs a day. When Queen Victoria passed through in 1877 on her way to visit Disraeli at Hughenden, the chair masters greeted her with a triumphal arch built entirely of chairs, assembled overnight across the High Street.
The workforce behind those numbers had to live somewhere, and the valley floor was already full, so the terraces went up the sides. Workers’ housing climbed the slopes east and west of the centre as the population more than doubled between 1881 and 1928, and most of those streets are still drained by the clay pipework laid when they were built.
Building a terrace on a hillside means cutting a level shelf for each row, which is why so many of these streets sit behind retaining walls, with one row’s back garden at the height of the next row’s bedroom windows. The drainage follows the same logic: pipes drop from level to level, pick up several houses, and often cross a neighbouring garden before reaching the sewer in the road below. When a shared run blocks or cracks, working out where the problem sits, and whose it is, takes a camera, not a theory; a CCTV drain survey maps the run and gives every affected household the same evidence.
What a steep town does to its drains
Gradient changes how drains fail, and High Wycombe has every gradient going.
On the steep runs coming down off the hillsides, water moves fast, but quick water is careless water: it reaches the bottom in seconds while the heavier material it was carrying drops out along the way. Wipes, fat and grit left stranded on a fast fall build up quietly, and engineers’ experience of steep runs is that they forgive neglect right up until the day they stop altogether. Blockages here arrive with little warning, which is why drain unblocking calls from the valley-side streets are often urgent rather than gradual.
Down on the valley floor the opposite applies: falls are shallow, flow is lazy, and silt, grease or a dropped joint leaves standing water behind. Flat-run blockages give notice: a gurgling gully, a toilet that clears reluctantly, a smell that comes and goes.
Then there is the rain. In a storm, every sloping drive, path and road becomes a channel, and all of it heads for the gullies at the bottom of the hill. A single gully at the foot of a steep street can take the runoff of the entire slope above it, and if silt from previous storms has part-filled it, the overflow goes looking for the nearest doorstep or airbrick. Keeping low-point gullies clear before winter is cheap flood protection; further down the pipe, high-pressure jetting restores the capacity the storm will demand.
The Wye, the culvert and the Rye
The river that powered the town’s first mills still runs through the middle of it, mostly out of sight. During the town-centre redevelopment of 1965 to 1967 the River Wye was culverted under concrete, and it now flows beneath Oxford Road and the Abbey Way flyover before re-emerging near the Swan Theatre, passing the Rye, the 53-acre park on its old flood plain south-east of the centre.
A buried river is a useful reminder of what else is buried. The foul and surface water systems thread through the same valley floor, and since High Wycombe’s own sewage treatment works closed in 2004, the town’s wastewater has been carried downstream to Thames Water’s works at Little Marlow. Cracked clay drains, root ingress and joints displaced by ground movement on the slopes are all repairable once found; drainage repairs start from an accurate camera picture, never from digging on spec.
The chalk the valley is cut through shapes the tap water too: it is hard here, and the kettle is the cheapest casualty.
The estates on the hilltops
The second wave of climbing came from the council. A slum clearance programme begun in 1932 condemned some of the worst valley-floor districts, Newland among them, and rehoused residents on new estates above the town: through the 1930s, 1950s and 1960s, Castlefield, Micklefield and Totteridge spread across the hilltops.
Plumbing on these estates is mid-century in character: galvanised steel supply pipe now rust-narrowed inside, original clay drains past their seventieth birthday, and gardens that slope hard enough to make every external pipe run an engineering decision. Because the estates stand at the top of the hill, their drains make the longest descents in town. The same goes for the flats added since the M40 made High Wycombe commuter territory: newer pipework, connected to the same long falls.
Covering High Wycombe from Bracknell
TrueFlow is based in Bracknell, and High Wycombe marks the northern edge of the firm’s patch. That is worth stating plainly: planned jobs and surveys are booked at times agreed with you, and emergencies are answered 24/7, 365 days a year, with a 60-minute response target.
Drainage prices, all including VAT: rodding from £80, high-pressure jetting from £150, CCTV surveys from £120, combined jetting and CCTV from £220, and emergency call-outs from £120. Drain unblocking is No Fix No Fee: if the camera shows the pipe has collapsed rather than blocked, you pay only for the survey and diagnosis. Leak detection is quoted individually and quotes are free. The full list is on the pricing page.
The neighbouring towns of Marlow, Maidenhead and Slough each have their own page.
High Wycombe drainage questions
Why does the gully at the bottom of my sloping garden keep flooding?
Because it is the lowest point, and in heavy rain it receives everything the slope sheds. First check it is actually clear: leaves, silt and moss washed downhill collect in exactly these gullies. If it floods even when clean, the pipe below may be partly blocked or undersized, and a camera inspection will show which. Jetting clears silted runs; a persistently overwhelmed gully may need a second one upslope to split the load.
Is the culverted River Wye connected to my drains?
No. The river beneath the town centre is a watercourse, separate from both the foul sewers and the surface water system, and household drains should not discharge into it. What matters at home is the separation on your own property: rainwater pipes wrongly connected into foul drains, or vice versa, cause smells, overloading and pollution. A CCTV survey identifies misconnections along with any defects.
My terrace sits above a retaining wall. Where does my drainage actually go?
Usually downhill through a shared run that steps from level to level, crossing one or more neighbouring gardens before reaching the sewer in the road below. Shared sections generally passed to the water company in 2011; the pipe serving only your home inside your boundary stayed yours. A survey settles whose stretch is whose before anyone is billed.
Does TrueFlow charge extra to come out to High Wycombe?
No. Prices are the published list prices, quotes are free, and the exact price is agreed before work starts, in HP11, HP12 and HP13 alike.
Covered, hilltop to valley floor
From a sudden stoppage on a hillside terrace to a pre-winter gully check on the valley floor, TrueFlow covers the whole of High Wycombe with prices agreed up front and a 6-month guarantee on every job.
Call 0808 175 7440, 24 hours a day, 365 days a year.