Description
400 Litre Slimline Tank with Lid
The 400 Litre Slimline Tank with Lid is designed to give you reliable water storage in tight spaces. With a 400-litre capacity and a narrow footprint, it fits neatly along fences, walls, and pathways where a standard tank would be too bulky. The included lid helps keep debris out of the tank and gives you a cleaner, more controlled storage solution.
This 400 litre slimline water tank is commonly used for storing non-drinking water such as rainwater, process water, or grey water on residential and light commercial sites. The tall, slim profile makes it a practical option for gardens, small yards, service areas and plant rooms where floor space is limited but vertical space is available.
The tank is built for everyday use, with a robust moulded body and integrated strengthening ribs to help maintain shape when full. It’s simple to connect into an existing system using suitable fittings, whether you’re topping up garden equipment, feeding a pressure washer, or holding buffer water for cleaning tasks. Always check the product specification before using the tank for drinking water to ensure it meets the correct standards.
Key Features
• 400-litre capacity
Gives you a useful volume of stored water without taking over the entire area.
• Slimline footprint
Tall, narrow design helps the tank sit neatly against walls, fences and in tight side passages.
• Fitted lid included
Helps reduce the risk of debris, leaves and animals entering the tank.
• Versatile water storage
Suitable for a wide range of non-potable water storage applications, depending on site requirements.
• Easy to integrate
Simple connection to pumps, hoses or existing pipework using compatible fittings.
• Low-maintenance design
Smooth surfaces and covered top make the tank easy to keep clean and inspect.
Specifications
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Capacity: 400 litres
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Approximate size: Diameter 345 mm x Height 1000 mm x Length 1240 mm
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Configuration: Slimline upright tank with lid
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Typical use: Non-potable water storage
Typical Applications
This 400 litre water storage tank is often chosen for:
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Collecting and holding rainwater for garden use
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Storing process or wash-down water on small commercial sites
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Providing buffer storage for pressure washers and cleaning systems
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Adding extra storage to existing tanks where space is restricted
The slimline garden water tank format makes it a good upgrade where standard round tanks simply don’t fit.
Check out our water tanks: https://prolinedirect.co.uk/product-category/water-tanks/
Or if space is a concern, take a look at our slimline water tanks: https://prolinedirect.co.uk/product-category/water-tanks/slimline-tanks/
FAQ
Is this tank suitable for drinking water?
Always refer to the product specification and manufacturer guidance. Only tanks that are clearly rated as potable should be used for drinking water.
Can this tank be installed outdoors?
Yes, it’s designed primarily for outdoor use. Install it on a level, stable base and follow any guidance provided by the manufacturer or installer.
Can I connect this to a rainwater harvesting system?
In many cases, yes – it can act as a space saving water tank within a wider rainwater setup using appropriate filters, downpipe diverters and fittings.
What maintenance does the tank need?
Periodically check the lid, outlets and any connections, and clean out any sediment build-up as required to keep the system running efficiently.
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