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Septic Tanks For Sale
A septic tank is typically installed underground and is commonly made from precast concrete, fibreglass, or plastic.
Concrete septic tanks are known for their durability and strength, making them a long-lasting solution, while fibreglass septic tanks offer a lightweight, rust-resistant alternative. Plastic septic tanks are another popular choice due to their affordability, ease of installation, and resistance to cracking.
These tanks effectively manage sewage by treating wastewater and storing solid waste. When mains drainage isn’t available, a septic tank connected to a soakaway system provides a reliable wastewater solution. All of our septic tanks meet the required regulations and are manufactured with longevity in mind. Our septic tank systems follow water quality codes of practice with well-known brands like Clearwater, Marsh Industries, Klargester, GRAF and Tricel in the range.
We also have supporting products, like sewage treatment plans, to help you dispose of your wastewater.
If your home or business uses a septic tank, you’ll need to register with the Environmental Agency. You’re also solely responsible for maintaining it. But we have advice across our site and the team are on hand to help with your specifications.
Take a look at our full range of UK septic tanks below.
GRAF Carat-RS 2700 Litre Shallow Dig Septic Tank with Pedestrian Lid - 4 Person | 4PE
GRAF Carat septic tanks are manufactured by injection compression moulding which ensures a uniform wall thickness and therefore tank stability. E..
£955.00 (ex. VAT) £1,146.00 (inc. VAT)
Marsh Euro:Septic 2800 Litre Septic Tank with Lid - 5 Person | 5PE
Marsh Euro:Septic 2,800 Litre septic tanks are a cost-effective method of providing basic wastewater treatment off the mains. This septic tank is manu..
£765.00 (ex. VAT) £918.00 (inc. VAT)
Marsh Euro:Septic 2800 Litre Shallow Dig Septic Tank with Lid - 5 Person | 5PE
Marsh Euro 2,800 Litre Shallow Dig Septic tanks are a cost-effective method of providing basic wastewater treatment off the mains. This septic tank is..
£995.00 (ex. VAT) £1,194.00 (inc. VAT)
Clearwater 2800 Litre Alpha Septic Tank with Lid - 5 Person | 5PE
Clearwater septic tanks are manufactured by Kingspan who also make the Klargester product range. Therefore when buying Clearwater products you can be ..
£950.00 (ex. VAT) £1,140.00 (inc. VAT)
Clearwater 2800 Litre Shallow Dig Septic Tank with Lids - 5 Person | 5PE
Clearwater shallow dig septic tanks are designed to meet both the installation requirements and the standards of discharge specified by BS 6297:1983. ..
£1,311.00 (ex. VAT) £1,573.20 (inc. VAT)
Klargester Alpha 2800 Litre Septic Tank with Lid - 5 Person | 5PE
The Klargester Alpha range of septic tanks are manufactured by Kingspan Klargester. This 2800 litre tank is suitable for a population of 5 people (5PE..
£1,022.00 (ex. VAT) £1,226.40 (inc. VAT)
Klargester Gamma Septic Tank 2800 Litres with Lid - 5 Person | 5PE
Kingspan Klargester has developed GAMMA as a direct response to market needs – an affordable and reliable septic tank that is easy to install in a ran..
£1,238.00 (ex. VAT) £1,485.60 (inc. VAT)
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Tricel Vento 3080 Litre Shallow Dig Septic Tank with Lids - 6 Person | 6PE
Tricel Vento septic tanks are manufactured from high density polyethylene using the latest in blow moulding technology. This market leading product..
£1,015.00 (ex. VAT) £1,218.00 (inc. VAT)
WTE EPIC 6 - 3100 Litre Shallow Dig Septic Tank with Lid - 6 Person | 6PE
This EPIC 6, 3100-litre shallow dig septic tank is suitable for a property up to and including 4 bedrooms or 6 full-time residents. EPIC Shallow dig ..
£849.00 (ex. VAT) £1,018.80 (inc. VAT)
Klargester Gamma Septic Tank 3500 Litres with Lid - 10 Person | 10PE
Kingspan Klargester has developed GAMMA as a direct response to market needs – an affordable and reliable septic tank that is easy to install in a ran..
£1,393.00 (ex. VAT) £1,671.60 (inc. VAT)
GRAF Carat-RS 3750 Litre Shallow Dig Septic Tank with Pedestrian Lid - 11 Person | 11PE
GRAF Carat septic tanks are manufactured by injection compression moulding which ensures a uniform wall thickness and therefore tank stability. E..
£1,075.00 (ex. VAT) £1,290.00 (inc. VAT)
Marsh Euro:Septic 3800 Litre Septic Tank with Lid - 12 Person | 12PE
Marsh Euro 3,000 Litre Septic Tanks are a cost-effective method of providing basic wastewater treatment off the mains. This septic tank is manufacture..
£965.00 (ex. VAT) £1,158.00 (inc. VAT)
Marsh Euro:Septic 3800 Litre Shallow Dig Septic Tank with Lid - 12 Person | 12PE
Marsh Euro:Septic tanks are a cost-effective method of providing basic wastewater treatment off the mains. This septic tank is manufactured from GRP, ..
£1,165.00 (ex. VAT) £1,398.00 (inc. VAT)
Clearwater 3800 Litre Alpha Septic Tank with Lid - 12 Person | 12PE
Clearwater septic tanks are manufactured by Kingspan who also make the Klargester product range. Therefore when buying Clearwater products you can be ..
£1,149.00 (ex. VAT) £1,378.80 (inc. VAT)
Clearwater 3800 Litre Shallow Dig Septic Tank with Lids - 12 Person | 12PE
Clearwater shallow dig septic tanks are designed to meet both the installation requirements and the standards of discharge specified by BS 6297:1983. ..
£1,571.00 (ex. VAT) £1,885.20 (inc. VAT)
Klargester Alpha 3800 Litre Septic Tank with Lids - 12 person | 12PE
The Klargester Alpha range of septic tanks are manufactured by Kingspan Klargester. This 3800 litre tank is suitable for a population of 12 people (12..
£1,236.00 (ex. VAT) £1,483.20 (inc. VAT)
Klargester Gamma Septic Tank 4000 Litres with Lid - 13 Person | 13PE
Kingspan Klargester has developed GAMMA as a direct response to market needs – an affordable and reliable septic tank that is easy to install in a ran..
£1,538.00 (ex. VAT) £1,845.60 (inc. VAT)
Tricel Vento 4000 Litre Shallow Dig Septic Tank with Lids - 12 Person | 12PE
Tricel Vento septic tanks are manufactured from high density polyethylene using the latest in blow moulding technology. This market leading product..
£1,465.00 (ex. VAT) £1,758.00 (inc. VAT)
Marsh Euro:Septic 4500 Litre Septic Tank with Lid - 16 Person | 16PE
The Onion-Shaped Marsh Euro 4,500 Litre Septic Tank is a cost-effective method of providing basic wastewater treatment off the mains. This septic tank..
£1,165.00 (ex. VAT) £1,398.00 (inc. VAT)
Marsh Euro:Septic 4500 Litre Shallow Dig Septic Tank with Lid - 16 Person | 16PE
The Shallow Dig Marsh Euro 4,500 Litre Septic Tank is a cost-effective method of providing basic wastewater treatment off the mains. This septic tank ..
£1,320.00 (ex. VAT) £1,584.00 (inc. VAT)
Clearwater 4800 Litre Shallow Dig Septic Tank with Lids - 18 Person | 18PE
Clearwater shallow dig septic tanks are designed to meet both the installation requirements and the standards of discharge specified by BS 6297:1983. ..
£1,823.00 (ex. VAT) £2,187.60 (inc. VAT)
GRAF Carat-RS 4800 Litre Shallow Dig Septic Tank with Pedestrian Lid - 18 Person | 18PE
GRAF Carat septic tanks are manufactured by injection compression moulding which ensures a uniform wall thickness and therefore tank stability. E..
£1,395.00 (ex. VAT) £1,674.00 (inc. VAT)
Tricel Vento 5000 Litre Shallow Dig Septic Tank with Lids - 20 Person | 20PE
Tricel Vento septic tanks are manufactured from high density polyethylene using the latest in blow moulding technology. This market leading product..
£1,575.00 (ex. VAT) £1,890.00 (inc. VAT)
Clearwater 5700 Litre Shallow Dig Septic Tank with Lids - 24 Person | 24PE
Clearwater shallow dig septic tanks are designed to meet both the installation requirements and the standards of discharge specified by BS 6297:1983. ..
£1,978.00 (ex. VAT) £2,373.60 (inc. VAT)
FAQ's
Waste enters the tank via the inlet pipe. The heaviest components sink to the bottom, while the lightest float. The effluent is between these two layers. As more liquid enters the tank, it’ll be pushed through the outlet into a closed network of perforated pipes. After this, the effluent’s filtered through the bed and into the soil below. For more information, please see our article detailing how septic tanks work.
How Often Does a Septic Tank Have to be Emptied?
To keep your septic tank functioning properly and avoid costly repairs, it’s essential to have it emptied regularly. On average, we recommend every 6 to 12 months. Frequency depends on factors like tank size, number of users, and what’s being flushed. Failing to empty regularly can cause blockages, smells, and system failure.
Where Should I Put My Septic Tank?
Your septic tank should be on flat ground, away from flooding risk, steep inclines, tree roots, utility lines, or plumbing. It should also be at least 7m from any property.
Is There a List of Things Not to Put in a Septic Tank?
Avoid putting anything other than bodily fluids into a septic tank, including nappies, cigarettes, cat litter, plastic, oils, rainwater, chemicals, or paint. These can block the system and cause damage.
How Can You Tell if Your Septic Tank is Full?
Signs your septic tank is full include slow drainage, gurgling sounds, strong odors, standing water or wet spots, and an increase in flies or midges. Prompt emptying is crucial to avoid system damage.
How Long Can a Septic Tank Last?
Septic tanks can last 20 to 40 years or longer with proper maintenance. Regular inspections and emptying prevent clogs and damage. Soil type, climate, and weather conditions also affect longevity.
Do Septic Systems Need to Be Serviced?
Yes, septic tanks should be serviced every 12 months, depending on usage. Regular maintenance, including pumping out contents and checks for proper functioning, is essential.
Do Septic Tanks Need a Permit?
Planning permission from your local council may be required to install a septic tank
What Are the 2 Shapes of Septic Tank?
There are two main shapes: onion-shaped tanks and shallow dig tanks. Onion-shaped tanks require concreting in after installation. Shallow dig tanks are simpler to install and used when digging depth is limited.
What is The Difference Between a Septic Tank and a Cesspool?
A septic tank treats wastewater by separating solids and filtering liquid into the soil, whereas a cesspool only collects wastewater for storage and requires more frequent emptying.
What Are The Reasons for Regularly Maintaining a Septic Tank?
Regular maintenance prevents blockages, environmental damage, extends system life, and ensures legal compliance.
How Can I Ensure My Septic Tank Meets Regulations?
To comply, you can upgrade to a sewage treatment plant, connect to mains sewer, or install a drainage field/soakaway to safely discharge effluent. Always meet the latest environmental standards.
How Far Does a Septic Tank Need to Be from My House?
The ideal distance is at least 7m from your house, though local regulations, property size, and soil conditions may vary. Always check with authorities or professionals.
