Practical safety and maintenance guidance for anyone storing water above ground on a UK site, covering hygiene, ground preparation, weather exposure, fittings and what to do if a tank fails.
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This 200 litre slimline water storage tank gives site teams and homeowners a space saving way to store rainwater and potable water above ground.
- Space saving slimline design fits neatly against walls and fences
- Made from UV stabilised food grade polyethylene
- Suitable for potable water storage and rainwater harvesting
- One piece moulded construction for strength and reliability
- Installs above ground, no groundworks required
- Works well for garden irrigation and general site use
200 Litre Slimline Water Storage Tank
Code
GW100004
This 200 litre slimline water storage tank gives site teams and homeowners a space saving way to store rainwater and potable water above ground.
- Space saving slimline design fits neatly against walls and fences
- Made from UV stabilised food grade polyethylene
- Suitable for potable water storage and rainwater harvesting
- One piece moulded construction for strength and reliability
- Installs above ground, no groundworks required
- Works well for garden irrigation and general site use
£259.39
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Slimline Water Storage Tank - 200 Litre
A slimline water storage tank built for tight spaces where a standard round tank would not fit. At 200 litres, it holds enough water for garden irrigation, rainwater harvesting or a backup potable supply, while its flat profile lets it sit flush against a wall, garage or fence line. The tank is moulded in one piece from UV stabilised, food grade polyethylene, so it copes with permanent outdoor exposure without cracking or fading.
How the slim profile solves a real space problem
A standard round water tank needs clearance on every side, which rules it out for narrow side returns, tight gaps between buildings or anywhere already crowded with bins and stores. That forces many site teams and homeowners to either give up valuable outdoor space or go without stored water altogether. The slimline profile on this tank solves that by keeping the same 200 litre capacity in a flat, wall hugging shape that fits where a round tank simply cannot.
Key Features
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Slim profile: Fits flush against walls, garages and fences where a round tank will not fit
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UV stabilised polyethylene: Resists cracking and fading under constant outdoor sun exposure
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Food grade material: Safe for potable water storage as well as non drinking uses
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One piece moulded body: No seams or joints that could weaken over time
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Above ground installation: No excavation or groundworks needed, ready to use once positioned
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Dual use capacity: Suited to rainwater harvesting, garden irrigation and emergency water storage
Who is this for
Trades and roles:
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Site managers
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Groundworkers
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Landscapers
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Facilities managers
Industries:
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Construction
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Landscaping and gardening
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Facilities management
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Agriculture
Specifications
| Specification | Detail |
| Product Name | 200 Litre Slimline Water Storage Tank |
| SKU | GW100004 |
| Tank Type | Slimline water storage tank |
| Capacity | 200 litres |
| Material | UV stabilised food grade polyethylene |
| Construction | One piece moulded |
| Installation | Above ground |
| Water Suitability | Potable and non potable use |
| Dimensions | L920 x D325 x H800mm |
Compatibility
| Application or condition | Status |
| Rainwater storage | Compatible |
| Potable drinking water storage | Compatible |
| Garden irrigation | Compatible |
| General site water storage | Compatible |
| Below ground or buried installation | Not recommended |
| Storage of chemicals or fuel | Not recommended |
| Connection to pressurised water systems | Not recommended |
Who is this for
This tank suits site managers and groundworkers who need a self contained water supply on constrained sites, landscapers fitting irrigation systems around domestic and commercial gardens, and facilities teams maintaining backup water for washdown or general use. Its flat footprint makes it a practical fit for narrow side returns, gaps between buildings, or any spot too tight for a round tank. Homeowners with small gardens use the same tank for rainwater harvesting and general outdoor watering.
Typical applications
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Collecting rooftop rainwater for reuse in garden irrigation and general outdoor tasks.
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Storing mains topped up potable water as a backup supply for site cabins or welfare units.
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Feeding drip irrigation and hose systems across allotments, gardens and landscaped areas.
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Supplying wash down water for tools, vehicles and equipment on construction sites.
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Holding water in narrow side returns or gaps between buildings where a round tank will not fit.
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Providing a standby water reserve for small agricultural or smallholding use.
How to use
Step 1: Position the tank on firm, level ground close to the wall, fence or downpipe it will serve.
Step 2: Connect the inlet to a rainwater diverter, hosepipe or fill point, depending on the water source.
Step 3: Fit an outlet tap or pump connection at the base if drawing water for irrigation or general use.
Step 4: Check the lid is fully seated before use to keep out debris and stop algae growth.
Step 5: Inspect the tank periodically for cracking, discolouration or leaks, especially after long UV exposure.
Common mistakes
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Placing the tank on uneven ground, which stresses the base and can cause splitting over time.
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Leaving the lid loose or missing, which lets in debris, insects and sunlight that encourages algae.
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Connecting the tank directly to a pressurised water system it was not designed for.
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Assuming the tank is rated for burial and installing it below ground, which it is not built for.
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Overfilling past the rated capacity, which puts unnecessary strain on the tank walls.
Safety
This tank is designed for above ground installation only and is not rated for burial or below ground use. It is not suitable for storing chemicals, fuel or any liquid outside its intended water storage use. Keep the lid fitted at all times to prevent contamination and reduce the risk of accidental access by children.
Maintenance
Rinse the interior periodically to remove sediment and prevent algae build up, especially in tanks used for rainwater. Check the lid seal and outlet fittings for wear every few months. Keep the tank clear of overhanging vegetation that can drop debris into an open inlet.
Frequently Asked Questions
Q: Is this tank suitable for storing drinking water?
A: Yes. It's moulded from UV stabilised, food grade polyethylene, so it's rated for potable water storage as well as non drinking uses like irrigation and general site supply. It's worth flushing and rinsing the tank before first use, and keeping the lid fitted at all times to protect stored water from contamination.
Q: What does UV stabilised polyethylene mean and why does it matter?
A: UV stabilisation is added during moulding to stop the polyethylene degrading under constant sunlight. Without it, plastic tanks left outdoors for years can fade, become brittle and eventually crack. For a tank installed permanently above ground, like this one, that stabilisation is what gives it a realistic long term outdoor lifespan.
Q: What is this tank not suitable for?
A: It is designed for above ground installation only and is not rated for burial or underground use. It should not be used to store chemicals, fuel or any liquid other than water. It is also not designed to be connected directly to a pressurised mains water system.
Q: Why choose a slimline tank over a standard round water tank?
A: A round tank of the same capacity needs clearance on every side, which rules it out for narrow gaps, side returns or anywhere already tight on space. The slimline shape keeps the same 200 litre capacity but sits flat against a wall, fence or garage, so it fits where a round tank cannot. For anyone working with a constrained footprint, that shape difference is often the deciding factor.
Q: Can this tank be used for both rainwater harvesting and mains fed water storage?
A: Yes. It works equally well collecting rainwater from a roof downpipe or holding mains topped up water as a backup supply. Many site teams and homeowners use it for both, switching the water source depending on the season or the task.
Q: How long will the tank last outdoors?
A: Service life depends on exposure and how well the tank is maintained, but the UV stabilised, one piece moulded construction is built for permanent outdoor installation. Keeping the lid fitted, avoiding overfilling and checking periodically for cracking or discolouration all help extend its working life. Regular rinsing also reduces the sediment build up that can shorten the life of tanks used for rainwater.
