Underground water tanks
If you’re looking for a water storage solution, our underground water storage tanks offer a practical solution. By burying your tank underground, you won’t be occupying valuable above-ground space, that can be used instead for other purposes, such as landscaping or construction. Underground tanks also provide protection from temperature fluctuations and help maintain stable temperatures for the stored water, preventing freezing in colder climates and keeping the water cooler in hot weather.
From potable to non-potable tanks, in a range of capacities, we have a wide range to choose from at Tanks Direct. Plastic tanks are typically more affordable than their concrete or fibreglass counterparts and are often simpler and quicker to install. Thanks to their lightweight plastic construction they are easy to transport, handle, and install, perfect for areas with challenging access or terrain. Our tanks are durable and long-lasting, resistant to corrosion and rust, and resistant to a variety of chemicals.
For more information on underground water tanks, please check out our Guide to Underground water tanks
- Grid
- List
10,000 Litre Plastic Underground water storage tank
10,000 Litre Underground water storage tank - Please note this tank is supplied single neck not twin neck
UK Manufactured, Made from high strength PE, Rota-moulded-single piece, Concrete backfill not usually required
A "fitted' tank means the pipe-work (calmed inlet, filter and connectors) within the tank and spigot connections are pre-installed. The telescopic lid (aka neck & lid)...
from £4,540.00 ex VAT
(£5,448.00 inc VAT)
1600 Litre Underground Water Tank
1600 Litre Underground Water Tank
MDPE underground water tank
Made from high-grade MDPE and suitable for clean water storage.
Recommended Concrete backfill on all underground tanks
“Underground water storage tanks are suitable for a variety of applications, such as:-
Suitable application
Sewage water
Grey water
Potable water
Rainwater storage and harvesting
Underground...
from £625.00 ex VAT
(£750.00 inc VAT)
200 Litre Underground Water Tank
200 Litre Underground Water Tank
MDPE underground water tank
Made from high-grade MDPE and suitable for clean water storage.(no outlets or any other drillings are supplied with a bare tank)
Recommended Concrete backfill on all underground tanks
SUITABLE APPLICATION
Sewage water
Grey water
Potable water
Rainwater storage and harvesting
Underground water storage tanks...
from £112.00 ex VAT
(£134.40 inc VAT)
2400 Litre Underground Water Tank
2400 Litre Underground Water Tank
MDPE underground water tank
Made from high-grade MDPE and suitable for clean water storage.(no outlets or any other drillings are supplied with a bare tank)
Recommended Concrete backfill on all underground tanks
Suitable application
Sewage water
Grey water
Potable water
Rainwater storage and harvesting
Underground water storage tanks...
from £879.00 ex VAT
(£1,054.80 inc VAT)
2600 Litre Underground water tank
2600 Litre Underground water tank
UK Manufactured, Made from high strength PE, Rota-moulded-single piece, Concrete backfill not usually required
A "fitted' tank means the pipe-work (calmed inlet, filter and connectors) within the tank and spigot connections are pre-installed. The telescopic lid (aka neck & lid) are normally separated to avoid damage during transport. It''s a push fit job to...
from £1,231.71 ex VAT
(£1,478.05 inc VAT)
2600 Litre Underground Water Tank
2600 Litre Underground Water Tank
MDPE underground water tank
Made from high-grade MDPE and suitable for clean water storage (no outlets or any other drillings are supplied with a bare tank)
Recommended Concrete backfill on all underground tanks
Suitable application
Sewage water
Grey water
Potable water
Rainwater storage and harvesting
Underground water storage...
from £744.00 ex VAT
(£892.80 inc VAT)
2800 Litre Underground Water Tank
2800 Litre Underground Water Tank
MDPE underground water tank
Made from high-grade MDPE and suitable for clean water storage (no outlets or any other drillings are supplied with a bare tank)
Recommended Concrete backfill on all underground tanks
Suitable application
Sewage water
Grey water
Potable water
Rainwater storage and harvesting
Underground water storage...
from £1,116.00 ex VAT
(£1,339.20 inc VAT)
3300 Litre Underground Water Tank
3300 Litre Underground Water Tank
MDPE underground water tank
Made from high-grade MDPE and suitable for clean water storage
Recommended Concrete backfill on all underground tanks
Suitable application
Sewage water
Grey water
Potable water
Rainwater storage and harvesting
Underground water storage tanks can be paired with a range of pump options from Tanks Direct,...
from £1,196.00 ex VAT
(£1,435.20 inc VAT)
3400 Litre Underground water storage tank
3400 Litre Underground water storage tank
UK Manufactured, Made from high strength PE, Rota-moulded-single piece, Concrete backfill not usually required
A "fitted' tank means the pipe-work (calmed inlet, filter and connectors) within the tank and spigot connections are pre-installed. The telescopic lid (aka neck & lid) are normally separated to avoid damage during transport. It''s a push fit...
from £1,595.00 ex VAT
(£1,914.00 inc VAT)
3500 Litre Underground Water Tank
3500 Litre Underground Water Tank
MDPE underground water tank
Made from high-grade MDPE and suitable for clean water storage (no outlets or any other drillings are supplied with a bare tank)
Recommended Concrete backfill on all underground tanks
Suitable applications
Sewage water
Grey water
Potable water
Rainwater storage and harvesting
Underground water storage...
from £923.00 ex VAT
(£1,107.60 inc VAT)
4400 Litre Underground water storage tank
4400 Litre Underground water storage tank
UK Manufactured, Made from high strength PE, Rota-moulded-single piece, Concrete backfill not usually required
A "fitted' tank means the pipe-work (calmed inlet, filter and connectors) within the tank and spigot connections are pre-installed. The telescopic lid (aka neck & lid) are normally separated to avoid damage during transport. It's...
from £2,060.00 ex VAT
(£2,472.00 inc VAT)
4400 Litre Underground Water Tank
4400 Litre Underground Water Tank
MDPE underground water tank
Made from high-grade MDPE and suitable for clean water storage (no outlets or any other drillings are supplied with a bare tank)
Recommended Concrete backfill on all underground tanks
Suitable Applications
Sewage water
Grey water
Potable water
Rainwater storage and harvesting
Underground water storage...
from £1,254.00 ex VAT
(£1,504.80 inc VAT)
5200 Litre Underground water tank
5200 Litre Underground water tank
UK Manufactured, Made from high strength PE, Rota-moulded-single piece, Concrete backfill not usually required
A "fitted' tank means the pipe-work (calmed inlet, filter and connectors) within the tank and spigot connections are pre-installed. The telescopic lid (aka neck & lid) are normally separated to avoid damage during transport. It''s a push fit job to...
from £2,542.00 ex VAT
(£3,050.40 inc VAT)
5300 Litre Underground Water Tank
5300 Litre Underground Water Tank
MDPE underground water tank
Made from high-grade MDPE and suitable for clean water storage (no outlets or any other drillings are supplied with a bare tank)
Recommended Concrete backfill on all underground tanks
Suitable Application
Sewage water
Grey water
Potable water
Rainwater storage and harvesting
Underground water storage...
from £1,383.00 ex VAT
(£1,659.60 inc VAT)
6800 Litre Underground storage tank
6800 Litre Underground storage tank
UK Manufactured, Made from high strength PE, Rota-moulded-single piece, Concrete backfill not usually required
A "fitted' tank means the pipe-work (calmed inlet, filter and connectors) within the tank and spigot connections are pre-installed. The telescopic lid (aka neck & lid) are normally separated to avoid damage during transport. It''s a push fit job...
from £3,735.00 ex VAT
(£4,482.00 inc VAT)
8400 Litre Underground water storage tank
8400 Litre Underground water storage tank
UK Manufactured, Made from high strength PE, Rota-moulded-single piece, Concrete backfill not usually required
A "fitted' tank means the pipe-work (calmed inlet, filter and connectors) within the tank and spigot connections are pre-installed. The telescopic lid (aka neck & lid) are normally separated to avoid damage during transport. It''s...
from £3,825.00 ex VAT
(£4,590.00 inc VAT)
227 Litre Underground Water Tank
227 ltr (50 gallon) Underground water tank, manufactured in High Density Polyethylene (HDPE)
This 200 Litre underground non potable water storage tank is manufactured in high density polyethylene (HDPE) with an optional 450mm plastic cover and frame. There is also the option to add a 215mm riser. Please use the drop down options to choose either or both the 450mm plastic cover & frame / 215mm...
from £199.00 ex VAT
(£238.80 inc VAT)
300 Litre Underground Water Tank
300 Litre Underground Water Tank
MDPE underground water tank
Made from high-grade MDPE and suitable for clean water storage.(no outletor any other drillings are supplied with a bare tank)
Recommended Concrete backfill on all underground tanks
Suitable Appliications
Sewage water
Grey water
Potable water
Rainwater storage and harvesting
Underground water storage...
from £131.00 ex VAT
(£157.20 inc VAT)
350 Litre Underground Water Tank
350 litre (75 gallon) Underground water tank
This 350 Litre underground non potable water storage tank is manufactured in high density polyethylene (HDPE) with an optional 450mm plastic cover and frame. There is also the option to add a 215mm riser. Please use the drop down options to choose either or both the 450mm plastic cover and frame / 215mm riser. This tank is lightweight but strong and robust...
from £209.00 ex VAT
(£250.80 inc VAT)
450 Litre Underground Water Tank
450 Litre Underground Water Tank
MDPE underground water tank
Made from high-grade MDPE and suitable for clean water storage.(no outlets or any other drillings are supplied with a bare tank)
Recommended Concrete backfill on all underground tanks
Suitable Application
Sewage water
Grey water
Potable water
Rainwater storage and harvesting
Underground water storage...
from £216.00 ex VAT
(£259.20 inc VAT)
600 Litre Underground Water Tank
600 Litre Underground Water Tank
MDPE underground water tank
Made from high-grade MDPE and suitable for clean water storage.(no outlets or any other drillings are supplied with a bare tank)
Recommended Concrete backfill on all underground tanks
Suitable Application
Sewage water
Grey water
Potable water
Rainwater storage and harvesting
Underground water storage...
from £236.00 ex VAT
(£283.20 inc VAT)
800 Litre Underground Water Tank
800 Litre Underground Water Tank
MDPE underground water tank
Made from high-grade MDPE and suitable for clean water storage.(no outlets or any other drillings are supplied with a bare tank)
Recommended Concrete backfill on all underground tanks
Suitable Applications
Sewage water
Grey water
Potable water
Rainwater storage and harvesting
Underground water storage tanks...
£317.00 ex VAT
(£380.40 inc VAT)
900 Litre Underground Tank
900 ltr (200 gallon) Underground Potable or Non Potable water tank.
Versatile storage tanks suitable for liquids. Manufactured in robust one-piece stress-free mouldings with smooth hygenic internal and external surfaces. Built-in lifting lugs for handling empty tanks. Suitable for potable water when fitted with byelaw 30 kit. Tank features 4 'flat' areas to make it easier to attach outlets / fittings.
Cost...
£455.00 ex VAT
(£546.00 inc VAT)
1000 Litre Underground Water Tank
This 1000 Litre (250 gallon) underground non potable water storage tank is manufactured in high density polyethylene (HDPE) with an optional 450mm plastic cover and frame
There is also the option to add a 215mm riser. Please use the drop down options to choose either or both the 450mm plastic cover and frame / 215mm riser
This tank is lightweight but strong and robust and easy to install. For...
from £329.00 ex VAT
(£394.80 inc VAT)
Underground Potable Water Tank - 1100 Litre
1100 Litre underground potable water storage tank. Suitable for potable water. This tank is available for immediate collection. Delivery within 3 to 5 days.
Features:- Excellent strength and performance for underground use.
- Suitable for domestic, agricultural and commercial use.
- Tank features multiple 'flat' areas to make it easier to attach outlets / fittings. 16" Lid and Seal
- Manufactured...
£527.00 ex VAT
(£632.40 inc VAT)
Underground Water Tank - 1100 Litre
1100 Litre underground water storage tank.Suitable for non-potable water.
Features
- Excellent strength and performance for underground use.
- Suitable for domestic, agricultural and commercial use.
- Extending neck up to approx 900mm fully extended
- Tank features multiple 'flat' areas to make it easier to attach outlets / fittings.
- Manufactured from WRAS approved polymer.
- Built-in lifting...
£586.00 ex VAT
(£703.20 inc VAT)
1200 Litre Underground Water Tank
1200 Litre Underground Water Tank
MDPE underground water tank
Made from high-grade MDPE and suitable for clean water storage.(no outlets or any other drillings are supplied with a bare tank)
Recommended Concrete backfill on all underground tanks
SUITABLE APPLICATION
Sewage water
Grey water
Potable water
Rainwater storage and harvesting
Underground water storage tanks...
£472.00 ex VAT
(£566.40 inc VAT)
1370 Litre Underground Water Tank
1370 Litre underground water storage tank - Suitable for non-potable water.
Features
- Excellent strength and performance for underground. installation to a standard depth of 500mm.
- Manufactured in high quality recyclable polyethylene.
- Suitable for domestic, agricultural and commercial use.
- Lightweight and easy to handle
- Low maintenance
- UV stabilised
- Corrosion resistant
-...
£1,057.00 ex VAT
(£1,268.40 inc VAT)
1500 Litre Underground Water Tank
This 1500 Litre (300 gallon) underground non potable water storage tank is manufactured in high density polyethylene (HDPE) with an optional 450mm plastic cover and frame. There is also the option to add a 215mm riser. Please use the drop down options to choose either or both the 450mm plastic cover and frame / 215mm riser. This tank is lightweight but strong and robust and easy to install. For installation,...
from £426.00 ex VAT
(£511.20 inc VAT)
1500 Litre Underground Water Tank
1500 ltr (300 gallon) Underground water tank
Manufactured in High Density Polyethylene (HDPE) making them strong and robust but lightweight and easy to install.They can be installed above or below ground.
- Can accommodate ?450 and 600x600mm free access openings/cover and frames
- Material - High density, low melt index hexane polyethylene
- High stiffness and hardness
- Excellent impact strength
-...
from £403.00 ex VAT
(£483.60 inc VAT)
1700 Litre Underground Water Tank
1700 Litre Underground Water Tank
MDPE underground water tank
Made from high-grade MDPE and suitable for clean water storage.(no outlets or any other drillings are supplied with a bare tank)
Recommended Concrete backfill on all underground tanks
SUITABLE APPLICATION
Sewage water
Grey water
Potable water
Rainwater storage and harvesting
Underground water storage tanks...
from £607.00 ex VAT
(£728.40 inc VAT)
1850 Litre Underground Tank
This 1850 Litre (400 gallon) underground non potable water storage tank is manufactured in high density polyethylene (HDPE) with an optional 450mm plastic cover and frame. There is also the option to add a 215mm riser. Please use the drop down options to choose either or both the 450mm plastic cover and frame / 215mm riser
This tank is lightweight but strong and robust and easy to install. For installation,...
from £427.00 ex VAT
(£512.40 inc VAT)
2000 Litre Underground Potable Water Tank
2000 Litre underground potable water storage tank. Suitable for potable water.
Features
Excellent strength and performance for underground use. 16" Lid and Seal
Suitable for domestic, agricultural and commercial use.
Manufactured from WRAS approved polymer.
Built-in lifting lugs for handling empty tanks.
Manufactured in Medium Density Polyethylene (MDPE)
Please note: The tank will not be suitable...
£758.00 ex VAT
(£909.60 inc VAT)
2000 Litre Underground Water Tank
2000 Litre underground water storage tank
Suitable for non-potable water
Features
Excellent strength and performance for underground use.
Suitable for domestic, agricultural and commercial use.
Extending neck up to approx 900mm fully extended
Tank features multiple 'flat' areas to make it easier to attach outlets / fittings.
Manufactured from WRAS approved polymer.
Built-in...
£752.00 ex VAT
(£902.40 inc VAT)
2,000 Litre Underground Potable Water Storage Tank
2,000 Litre Underground Potable Tank
This 2000 litre non potable underground tank is designed for use in the industrial, agricultural, commercial and domestic schemes. Rotationally manufactured with high-density polyethene in a robust one-piece stress-free moulding with smooth hygienic internal and external surfaces. These units have 600mm Square Galvanised lid's and can have pipework suitable...
£1,045.00 ex VAT
(£1,254.00 inc VAT)
2,000 Litre Underground Non-Potable Water Storage Tank
2,000 Litre Underground Tank
This 2000 litre non potable underground tank is designed for use in the industrial, agricultural, commercial and domestic schemes. Rotationally manufactured with high-density polyethene in a robust one-piece stress-free moulding with smooth hygienic internal and external surfaces. These units have 600mm Square Galvanised lid's and can have pipework suitable for either...
£1,045.00 ex VAT
(£1,254.00 inc VAT)
2000 Litre Underground Water Tank
2000 Litre (450 gallon) underground non potable water storage tank
Manufactured in high density polyethylene (HDPE) with an optional 450mm plastic cover and frame. There is also the option to add a 215mm riser. Please use the drop down options to choose either or both the 450mm plastic cover and frame / 215mm riser. This tank is lightweight but strong and robust and easy to install. For installation,...
from £507.00 ex VAT
(£608.40 inc VAT)
2150 Litre Underground Water Tank
2000 ltr (450 gallon) Underground water tank
Manufactured in High Density Polyethylene (HDPE) making them strong and robust but lightweight and easy to install. They can be installed above or below ground.
Cost includes shipping to most UK postcodes (certain postcodes may cost more, see our terms page for more details).
from £513.00 ex VAT
(£615.60 inc VAT)
2410 Litre Underground Water Tank
2410 Litre underground water storage tank - Suitable for non-potable water.
Features
Excellent strength and performance for underground. installation to a standard depth of 500mm.
Manufactured in high quality recyclable polyethylene.
Suitable for domestic, agricultural and commercial use.
Lightweight and easy to handle
Low maintenance
UV stabilised
Corrosion resistant
Fully...
£1,236.00 ex VAT
(£1,483.20 inc VAT)
2700 Litre Underground Water Storage Tank
2700 litre (600 gallon) Underground Potable or Non Potable water tank Paxton CT0600JB. Tank can be installed above or below ground.
Versatile storage tanks suitable for liquids. Manufactured in robust one-piece stress-free mouldings with smooth hygenic internal and external surfaces. Built-in lifting lugs for handling empty tanks. Suitable for potable water when fitted with byelaw 30 kit. Tank features...
£1,075.00 ex VAT
(£1,290.00 inc VAT)
2800 Litre Underground Potable Water Tank
2800 Litre Underground Potable water tank
Manufactured in High Density Polyethylene (HDPE) making them strong and robust but lightweight and easy to install. These tanks are made from virgin polymer in a one piece mould for extra strengths with a 500 mm neck in th UK.
Lid - 450 mm (18'' )
Please ensure that the Installation Guidelines have been read and understood before commencing...
£1,200.00 ex VAT
(£1,440.00 inc VAT)
3000 Litre Underground Potable Water Storage Tank
3000 Litre Potable water storage tank.
Suitable for potable water.
Features
Excellent strength and performance for domestic, agricultural and commercial use. 16" Lid and Seal
The tank features multiple 'flat' areas to make it easier to attach outlets / fittings.
Please note: The tank will not be suitable for potable water if the non-vented lid is not used.
Manufactured...
£941.00 ex VAT
(£1,129.20 inc VAT)
3000 Litre Underground Water Tank
Underground Water Tank - 3000 Litre
Available for immediate collection. Delivery within 3 to 5 days.
Features
- Excellent strength and performance for underground use.
- Suitable for domestic, agricultural and commercial use.
- Optional Extending neck up to approx 900mm fully extended
- Tank features multiple 'flat' areas to make it easier to attach outlets / fittings.
Neck: Two Piece - Has flat...
£1,011.00 ex VAT
(£1,213.20 inc VAT)
3000 Litre Underground Water Tank
3000 Litre (700 gallon) underground non potable water storage tank
Manufactured in high density polyethylene (HDPE) with an optional 450mm plastic cover and frame. There is also the option to add a 215mm riser. Please use the drop down options to choose either or both the 450mm plastic cover and frame / 215mm riser. This tank is lightweight but strong and robust and easy to install. For installation,...
from £950.00 ex VAT
(£1,140.00 inc VAT)
3,500 Litre Underground Non- Potable Water Storage Tank
3,500 Litre Underground Tank
This 3,500 litre non-potable underground tank is designed for use in the industrial, agricultural, commercial and domestic schemes. Rotationally manufactured with high-density polyethene in a robust one-piece stress-free moulding with smooth hygienic internal and external surfaces. These units have 600mm square glavanised lid's and have turret for housing control...
£1,100.00 £1,005.00 ex VAT
(£1,206.00 inc VAT)
3,500 Litre Underground Potable Water Storage Tank
3,500 Litre Underground Tank
This 3,500 litre potable underground tank is designed for use in the industrial, agricultural, commercial and domestic schemes. Rotationally manufactured with high-density polyethene in a robust one-piece stress-free moulding with smooth hygienic internal and external surfaces. These units have 450mm round plastic lid's and have optional turrets for housing control...
£1,100.00 £1,025.00 ex VAT
(£1,230.00 inc VAT)
4500 Litre Below Ground Water Storage Tank
4500 ltr (1000 gallon) Underground Potable or Non Potable water tank. Tank can be installed above or below ground.
Versatile storage tanks suitable for liquids. Manufactured in robust one-piece stress-free mouldings with smooth hygenic internal and external surfaces.
Built-in lifting lugs for handling empty tanks. Suitable for potable water when fitted with byelaw 30 kit. Tank features 4 'flat' areas...
from £1,355.00 ex VAT
(£1,626.00 inc VAT)
4500 Litre Underground Water Tank
4500 Litre (1000 gallon) Underground water tank
Manufactured in High Density Polyethylene (HDPE) making them strong and robust but lightweight and easy to install. For installation, please make sure it is back filled with Concrete. They can be installed above or below ground. In suitable good ground conditions they can be installed underground in granular material.
Lid - 450mm (18'')
Cost...
from £1,140.00 ex VAT
(£1,368.00 inc VAT)