How to hire
Start by matching the firm to the job, because emptying, repair and installation are different briefs. A routine empty suits any tanker operator with access for the hose; a cesspit needs booking more often since it stores rather than treats waste [3]; repeated backups, smells after a recent empty or soggy ground over the drainage field point to a survey-first job with camera work before anyone digs; and a replacement tank or new drainage field needs an installer who surveys the ground, not just a clearance van. When you enquire, say which system you hold, when it was last emptied and where the lid and access sit.
A typical empty runs the same course each time. First contact sets the brief: which system you hold, when it was last emptied, where the lid sits and how a tanker reaches it. If your home sits off the mains anywhere from Wellington and Dawley to Madeley, Lawley and the Gorge villages, say so in that first call, since hose length, parking and tanker access decide the visit the firm can offer. The firm should confirm waste carrier registration and agree the price structure before booking [1]. On the day the crew empties to the working level, notes anything odd such as drains running back or a crust that suggests the field is tiring, and leaves a receipt naming the date and the volume removed.
Check waste handling before anything else, because sludge stays your legal responsibility until its disposal is documented. Anyone taking sewage sludge away for payment must hold a waste carrier registration: open the Environment Agency public register, search the business name and note the registration details before the tanker loads [1]. The binding rules say the same in plain terms — ask the firm to confirm registration when you book, or ask the driver for a copy of the carrier certificate on the day [2]. If the name is missing or the details do not match, say so and hold the job until it is settled.
Know the duties that sit on you as the tank operator, since most Telford tanks fall under the general binding rules rather than a permit. The owner of the property is normally the operator, and connecting to the mains sewer removes the duties entirely [4]. Expect to empty at least once a year or in line with the maker's instructions, with maintenance by someone competent, a system built to the relevant British Standard, and discharge to the ground through a drainage field sized for the flow — plus building approval and planning permission where a new system needs them [2]. Your tank must treat domestic sewage only and must not pollute nearby water [2].
Telford and Wrekin add their own layer to installs and replacements. A new system must have building-regulations approval, and the council's usual route is a full-plans application with detailed drawings, ending in an approval notice and a completion certificate once the work is finished [9]. Planning permission is a separate question: check with the council first, since local restrictions bite in the Gorge and in conservation areas, and pre-application advice is available before a formal bid [10] [11]. Homes inside the Ironbridge Gorge face the tightest rules, with an Article 4 direction removing some permitted development rights and most of the site sitting in a conservation area [11]. Where a mains sewer runs nearby, connecting to it can remove the private-system duties entirely, but only with the sewerage company's written approval following an application [8] [12].
Treat scheme badges as background, not proof. Firms in this round state memberships such as SafeContractor, CHAS, Constructionline, Drainsafe and water-jetting associations on their own websites, and those claims speak to general contractor processes rather than septic competence. Check limited companies on Companies House for active status and a matching trading name [6]. Ask to see public liability insurance details and two recent local jobs like yours, with contact detail you could verify.
Get the price structure agreed before the tanker moves. A proper quote names the volume or tank size priced, the attendance or call-out terms, access assumptions such as hose length and parking, what counts as extra — jetting, camera work, digging — plus emergency timing uplifts and VAT on top [3] [5]. For installs, each stage needs its own figure: the unit, excavation and positioning, the drainage field, old-tank removal and compliance sign-off, since guides put installs far above empties and hard ground pushes totals higher still [5]. For an empty, the written scope fits on a page: the address and tank position, the volume or size priced, the agreed attendance window, the extras and their trigger prices, and the total with VAT. Put the scope and the ceiling price in writing first.
After the job, keep the itemised receipt showing the date, the volume removed and where the waste is consigned, alongside any service notes, camera footage and the next-empty reminder [7]. That file proves the yearly emptying the rules expect and answers the first question any buyer or surveyor asks about an off-mains home. For repairs and installs, keep the guarantee terms and the compliance paperwork with your house file, and do not pay the balance until every promised document is in your hands.
Pricing
As of autumn 2026, rough Telford guides for emptying look like this. A standard domestic empty commonly falls between £175 and £312.50, with around £225 a fair average; small tanks sit near £150 to £195, medium tanks near £175 to £225, large tanks near £200 to £250 and extra-large tanks near £225 to £400, all excluding VAT [3]. Most visits take well under two hours once the tanker can park close [3].
Survey and repair extras sit on top of the empty. A camera inspection or a clean added to the visit carries its own charge above the emptying fee [3] [5]. Smaller repairs run from around £300 for blocked pipes to around £750 for a pump, with depth, access and parts moving the figure [3] [5]. Autumn 2026 guides treat these as add-ons rather than fixed menu prices, so ask which extras the visit includes before the tanker rolls [3] [5].
Bigger briefs cost far more. Installing a septic tank typically runs £4,200 to £6,000 including standard excavation, a straight replacement comes in near £4,000 where the drainage field survives, and a new compliant drainage field adds £3,000 to £7,000; complex ground or compliance work can push totals past £10,000 [5].
Access and timing move the price most. Tank size and how overdue the empty is set the base, then a long hose run, poor digger access, high water table or clay that fails its percolation test all add cost; same-day and emergency call-outs carry uplifts, and a failed drainage field turns an empty into a groundworks job [3] [5]. Cesspits cost more over time than septic tanks because sealed storage means more frequent visits [3].
Get attendance, emptying, extras and any repair priced as separate written stages with VAT shown, since published guides exclude it, and treat a single fixed figure for a large install with no breakdown as a question rather than an answer [3] [5]. Agree what happens if the tanker cannot finish the job or the fault lies beyond your tank, and pay nothing beyond a fair deposit until the receipt, the service notes and any promised footage are in your hands.
Red flags
Quotes an empty without asking the tank size, its location or how the tanker reaches it.
Cannot confirm waste carrier registration or show a carrier certificate when asked [1] [2].
Offers to spread, dump or forget the sludge with no receipt naming where it went.
Prices a replacement tank or drainage field without visiting or testing the ground.
Gives one fixed figure for a large install with no breakdown of unit, digging and field [5].
Asks for full payment in cash before the tanker arrives, with nothing written down.
Leaves no receipt showing the date and volume removed after the visit.
Starts install or field work without mentioning building approval or planning permission where a new system needs them [8] [9].
Refuses to put the scope, price and timing in writing before the tanker moves.