Septic Tank Installers – Yorkshire & Nationwide
Free site survey · Fixed written quote · Zero call out charge
New installations, replacements and repairs by a Checkatrade-registered Yorkshire team, trusted by 800+ homes, farms and businesses.
Checkatrade RegisteredMember since 2021 · £1,000 guarantee*
5-Star Google ReviewsRated by local customers
0% Finance availableUp to 12 months interest FREEWe plan access with you, keep you informed and leave the site tidy.
Every installation guaranteed to meet UK regulations.
Spread the cost over up to 12 months, interest free.
Expert
Installing a septic tank is a regulated groundworks job: the tank has to be the right size, in the right ground, discharging the right way. Flowfinity handles every stage – survey, sizing, regulations, excavation, installation and aftercare – so you deal with one team from first call to final sign-off.
Simple Process
No pushy sales visit. The survey is about finding the right system for your ground and your budget, and giving you a price you can rely on.
Call or send the form. We call you back the same working day, Monday to Friday, and most survey appointments can be arranged quickly.
We assess the site, ground conditions and how the system discharges, recommend the right size and put a fixed price in writing.
Our own engineers excavate, install and connect the tank with minimal disruption, keeping you informed throughout.
We make sure the installation meets the regulations, tidy the site and stay on hand for maintenance and emptying advice.
Honest pricing
Every site is different, which is why we survey before we quote. These are the things that move the price – and the things that don't.
Sized by bedrooms and occupancy. A 3-bedroom home typically needs a system for around 5 people.
Clay or waterlogged ground may need a larger drainage field or a different solution – we test before we price.
Machine access, distance to the house and whether an old tank needs decommissioning all affect the groundworks.
Zero call out charge. No hidden fees. The price on your quote is the price you pay – and you can spread it with 0% finance over up to 12 months.
Which system?
Not sure which you need? This is the first thing we settle at the survey. In short: if your system can discharge to a drainage field in the ground, a septic tank may be fine; if it discharges to a watercourse, you need a treatment plant.
| Septic tank | Sewage treatment plant | |
|---|---|---|
| How it works | Settles solids; liquid drains to a drainage field for treatment in the soil. | Treats the waste in the tank using air and bacteria; cleaner effluent. |
| Where it can discharge | Drainage field only – not to a ditch, stream, river or canal. | Drainage field or, with permission, directly to a watercourse. |
| Drainage field | Larger area needed. | Smaller area needed. |
| Running costs | No power. Emptied roughly every 1–2 years. | Small electricity cost for the air pump. Annual service plus emptying. |
| Upfront cost | Lower. | Higher, but often the only compliant option and lasts longer. |
| Best for | Properties with good ground and space for a drainage field. | Watercourse discharges, modern builds, replacements and most upgrades. |
Regulations, in plain English
The General Binding Rules. Small sewage discharges must meet the Environment Agency's rules: septic tanks may only discharge to ground through a drainage field, and anything discharging to surface water must be a treatment plant. Larger discharges or sensitive locations need an environmental permit.
Building Regulations & planning. New and replacement systems need Building Regulations approval (Part H) and may need planning permission. We advise on both before any work starts, so there are no surprises at sign-off or when you sell.
Our guarantee. Every installation is guaranteed to comply with UK regulations – and as a Checkatrade member, our work is backed by the Checkatrade £1,000 guarantee*.
Our Reviews
★★★★★"Very professional company. All the workmen were very courteous and professional. I will highly recommend the company. Just had a new septic tank installed."
Flowfinity Customer – Google, May 2024"We have had the team out to our smallholding to replace our broken septic tank. The guys are simple, honest and very easy to work with. They keep you fully involved throughout the process."
Paula Summers – Facebook, November 202410/10"The work was clearly explained beforehand and every question answered. Workmanship was faultless, and they cleaned up after themselves. This is how tradesmen should be!"
Flowfinity Customer – Checkatrade, March 2024Checkatrade member since 2021Vetted · £1,000 guarantee*5-star Google reviewsFrom homeowners across YorkshireGood to know
It depends on tank size, ground conditions, access and whether an old system needs removing – see the cost section above. We survey first, then give you a fixed price in writing with zero call out charge. 0% finance over up to 12 months is available.
In most cases a replacement does not need planning permission, but Building Regulations approval is required and some sites do need planning. We check this for you at the survey and guide you through the process.
Septic tanks must follow the Environment Agency's General Binding Rules: discharge to ground via a drainage field only, within volume limits and away from protected areas. If your tank discharges to a ditch or stream it must be replaced with a treatment plant. We guarantee every installation complies.
Septic tanks can be installed in most soils, but heavy clay or high water tables can stop a drainage field working. We test the ground at the survey and recommend the solution that will actually work – which is sometimes a treatment plant instead.
We give you a clear timescale with your quote. We plan machine access with you beforehand, keep disruption to a minimum, keep you informed while we're on site and tidy up when we're done.
Usually every 1–2 years depending on usage. We offer ongoing maintenance and can advise on emptying schedules after installation.
Where we work
Our engineers are based near Wakefield and cover Yorkshire and the North of England every day. We also travel further afield for larger installations – just ask.
Speak to our septic tank specialists today. Free survey, fixed written quote, zero call out charge and 0% finance on installations.
