Commercial drain unblocking is the reactive half of commercial drainage: an engineer sent to business premises where a drain has stopped, to clear it and explain why it blocked. TrueFlow provides it across Bracknell, Reading, Slough and the surrounding Berkshire towns, with the phone answered 24 hours a day, 365 days a year, and a 60-minute response target when the blockage is stopping the premises from operating. Rodding starts from £80, high-pressure jetting from £150 and an emergency attendance from £120, all including VAT, and unblocking is No Fix, No Fee on the terms set out below.
The clearance comes with a fixed price first, a written cause afterwards, and a clear answer on whether the pipe is yours to pay for at all.
How quickly an engineer attends
A blockage that has closed part of the premises is treated as an emergency: the call is answered at any hour and the engineer sets off against a 60-minute response target. Out-of-hours attendance is part of the service, so a failure at 11pm on a Sunday is handled by the same crew, at a price agreed over the phone first. A blockage that is slowing a site rather than stopping it is booked into whatever gap the business has; hospitality premises have their own page on working around opening hours.
Methods and prices
Clearing a commercial drain uses the same toolkit as a domestic one, scaled for longer runs and larger pipe. Rodding, from £80, suits a shallow obstruction close to an accessible chamber. High-pressure jetting, from £150 at pressures up to 4000psi, handles anything grease-bound, silted or a long way from the access point. Where the blockage is unexplained or has happened before, a CCTV survey from £120 finds the cause, and jetting with a camera pass is from £220 so the line is cleaned and inspected in one visit.
Every figure includes VAT and is a starting price: a 225mm estate run two hundred metres long is not priced like a kitchen branch, so larger runs are quoted once the engineer has seen the access, diameter and length. The agreed figure is confirmed before work starts. UK market ranges by premises type are in the commercial drain unblocking cost guide.
No Fix, No Fee
The commitment applies to commercial premises as it does to homes. If the drain cannot be cleared because the pipe behind the blockage has collapsed, the charge covers the survey and diagnosis only, never the unblocking attempt, and the footage and findings are handed over so the repair can be priced on evidence.
The blockages premises keep producing
Kitchen lines. Fat, oil and grease set where the run cools, narrowing the pipe a little more each week. Jetting clears the line; a grease trap emptied on a schedule stops it refilling.
Washrooms at scale. Staff and public washrooms put dozens of users onto a handful of branches and one stack, so an obstruction that would inconvenience a single bathroom at home takes a whole floor out of use. Clearing is quick; a stack that keeps blocking has a defect that deserves a camera pass.
Yard gullies and channels. A yard gully takes silt, leaf litter, packaging and bin-store washings, and one that has quietly stopped accepting water is discovered when the loading bay floods. The pot is emptied and the outlet jetted; silt removed from site travels under TrueFlow’s Upper Tier waste carrier registration, CBDU538687, with a Waste Transfer Note.
Shared estate runs. On a business park or a parade, several units may discharge into one private run before it reaches the public sewer. A blockage there surfaces in whichever unit sits lowest, rarely the one that caused it, and agreeing who instructs the clearance can take longer than the clearance.
Who pays for the clearance
For a blockage, the practical question is who instructs the engineer, and that follows ownership of the pipe. A unit’s own drains, up to the point they join anything shared, sit with the occupier under most repairing leases; common runs on an estate or parade sit with the landlord through the service charge, and some leases allow a clearance to be recharged to the unit whose fat or wipes caused it. Shared and off-boundary pipework largely passed to the water companies in October 2011, so a sewer serving several separately owned premises is cleared by Thames Water across most of the area TrueFlow covers, at no cost to the business. The engineer’s report states which zone the blockage sat in; the legal detail, with its exceptions, is in the guide to blocked drain responsibility.
What you receive afterwards
The clearance report records where the blockage was, what it consisted of, how it was cleared and the condition the pipe was left in, with photographs and, where a camera went in, the footage. The invoice is for the authorised figure and quotes your purchase order number where one was raised. Work is fully insured and carries a 6-month guarantee.
Where the record shows a drain that will block again, a schedule beats a second emergency. Drainage maintenance contracts are quoted per site after a free survey, and the clearance report is where that survey starts.
Commercial drain unblocking FAQs
Who is responsible for a blocked drain in a commercial property?
Whoever owns the pipe where the blockage sits: the lease fixes that for the runs inside a unit and on an estate, and the public sewer is the sewerage undertaker’s to clear at no charge. A clearance is instructed by the party that owns the run, so if the blockage points at the public sewer the job is referred rather than billed.
Is a blocked drain at a business an emergency?
It is if it stops the premises trading or creates a hygiene risk: a kitchen sink that will not drain, a toilet block out of use, sewage surfacing in a yard. Those are attended with a 60-minute response target at any hour, with emergency call-outs from £120 including VAT. A slow drain that is still flowing is better booked into a quiet period at the standard rate.
What does commercial drain cleaning actually involve?
Clearing the obstruction and then cleaning the length of pipe that let it form: high-pressure jetting at up to 4000psi along the whole run, not just the blocked section, so grease, scale and silt are removed from the pipe wall rather than pushed further along it. A camera pass afterwards confirms the pipe is clear and shows any defect the deposit was covering.
How do we stop the same drain blocking again?
Find out why it blocked. The first step is a CCTV survey, from £120, to separate a defect (a root, a displaced joint, a dip in the run) from a loading problem (grease, scale, silt). Defects are repaired; loading problems go onto a maintenance schedule matched to how fast the deposit builds, turning a repeat emergency into a planned visit at a known price.
Can work happen without closing the premises?
Often, though not always. A blockage reached from an external chamber or yard gully can usually be cleared while the business trades, with the engineer outside and the shop floor or kitchen undisturbed. Internal work on stacks and washrooms takes those fixtures out of service, so it is booked for a closed period or timed for the quietest point of the day and finished before the next peak.
Clear it now, or price it first
For an engineer today, call TrueFlow on 0808 175 7440; the line is answered 24/7, 365 days a year. For a blockage that can wait for a quiet period, request a callback with the premises details and a fixed price comes back before anything is booked.