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Water butt buying guide

Updated: October 2026

You are beside the downpipe with a tape, and the amazon.co.uk title is already shouting 250 litres or 380 litres. A water butt buying guide for this set starts with the gap and the carton, not with that number. The eleven listings on the [water butts](/hub/garden-watering/water-butt) comparison are rigid slimline kits of about 100 litres, rigid tanks of 210 to 250 litres, or collapsible PVC. Shelf prices on 15 October 2026 run from £33.69 to £79.99. Who each one is for sits on the [best water butt](/hub/garden-watering/water-butt/sub/water-butt-best) page. The Products Compared editorial team read those listings. There is no laboratory test. A qualifying purchase can earn a commission at no extra cost to you.

You are beside the downpipe with a tape, and the amazon.co.uk title is already shouting 250 litres or 380 litres. A water butt buying guide for this set starts with the gap and the carton, not with that number.

Our top picks

Pluto Packaging Pluto 100 litre kit

Best overall

Pluto Packaging Pluto 100 litre kit
9.0/10about £33.69
View offer
Bowers Bargains Bowers 100 litre kit

Best value

Bowers Bargains Bowers 100 litre kit
8.6/10about £39.99
View offer
Whitefurze Whitefurze 250 litre kit

Alternative

Whitefurze Whitefurze 250 litre kit
8.4/10about £79.99
View offer
On this page
  1. 1.Measure the gap before the litres
  2. 2.Buy the kit you will actually fit
  3. 3.Check the capacity line against the title
  4. 4.Weigh the reviews, then the price

Measure the gap before the litres

A side passage in a British terrace is often why a slimline kit is on the shortlist. Pluto's single 100 litre kit and the Bowers 100 litre kit both print about 32 cm by 36 cm by 95 cm, on a stand about 30.5 cm high. That stand lifts the tap toward a watering can. If the gap is under about 40 cm once you allow for the downpipe, those two footprints match the bullets. Strata's Sl100uk is also titled slimline, at £33.89, but technical details print 60 cm by 60 cm by 90 cm. Original Organics prints a width of 540 centimetres, which is the raw string and not a size you can mark on the paving. The base has to be firm and level, and the tap still has to clear your can.

Buy the kit you will actually fit

Waterwise treats a typical butt as something you raise so a can fits, with a diverter that sends excess back down the pipe once the tank is full. In this set, read the box line before the photograph. Whitefurze at £79.99 names a stand, a diverter, a T-piece, a tap and a flexible hose. Original Organics at the same price names a tap, a lid, a stand and a diverter, and does not confirm a length of downpipe. Pluto's single kit names a stand, a diverter, a tap, a T-piece and a hose, and the highlight names a lid. Bowers' 210 litre barrel at £48.95 names a tap and a lockable lid, and it does not name a stand or a diverter. Pluto's twin pack shows the tanks joined, and reviewers say the joining piece is not in the box.
Pluto Packaging Pluto 100 litre kit

Testsieger

Pluto Packaging Pluto 100 litre kit
9.0/10about £33.69
View offer

Check the capacity line against the title

Waterwise's typical range is 100 to 300 litres. The RHS treats about 240 litres as a standard butt, not a size to order. Four listings print two capacity stories. BeGrit says 380 litres and also 350. Mekturm says 53 US gallons as 200 litres, and technical details say 53 gallons. VeftBltrem says 200 litres and 52.8 gallons with the unit unstated. A 210 or 250 litre kit is the larger store when the stand is named. Collapsible PVC is a different object, on the slimline water butt versus collapsible page.

Weigh the reviews, then the price

A 4.5 from 283 reviews on the Pluto 100 litre kit outweighs a 5.0 from five reviews. Whitefurze at 4.2 from 1,149 is the pool where a dripping tap shows up often enough to plan for. On 15 October 2026 the shelf prices run from Pluto's single kit at £33.69 and Strata at £33.89 up to Original Organics and Whitefurze at £79.99. The cheap end is only cheap if the footprint matches the gap you measured. A mains top-up, a toilet, or a washing machine is installer work, on the how to install a water butt page.

Common questions

What size water butt do I need for a small UK garden?
Start with the gap beside the downpipe. Slimline kits that print about 32 cm by 36 cm by 95 cm, on a stand about 30.5 cm high, are the side-passage size in this set. Waterwise's typical range is 100 to 300 litres. A 250 litre kit only helps if the footprint and a stand are both real. Strata's printed 60 cm by 60 cm by 90 cm is a different gap, even though the title says slimline.
Is a 100 litre butt enough, or should I buy 210 to 250 litres?
A 100 litre butt is enough for cans from a modest roof if the stand lifts the tap. A 210 or 250 litre kit stores more in a dry spell, though only when the box names a stand. Bowers' 210 litre barrel does not list a stand, so the tap sits too low unless you raise it. The RHS figure of about 240 litres is a standard size, not an order to ignore the paving.
Why do some titles and capacity lines disagree?
The title and the technical details were not written as one sentence. BeGrit says 380 litres and also 350 litres. Mekturm says 53 US gallons as 200 litres, and technical details say 53 gallons. VeftBltrem says 200 litres and 52.8 gallons with the unit unstated. Original Organics states 250 litres and prints a width of 540 centimetres. Keep both figures. Do not average them into a capacity nobody printed.
How heavy is a full water butt?
About 1 kg of water per litre, plus the empty tank. A full 100 litre slimline is about 100 kg of water before the plastic. A full 250 litre butt is about 250 kg of water, even when the empty shell is only 1.5 kg. Empty weight is what you carry in from the car. It is not the weight on the paving once the tank has filled.
Can I drink the water or run it to a toilet?
Roof water is for the garden, not for drinking. A food-grade line does not change that, and none of these listings claims BS EN 16941-1 certification. A toilet, a washing machine, or a mains top-up needs an air gap and notification. That is installer work. Do not store greywater in the butt.

Related pages

Watering can comparison

Water butt

Best water butt for a narrow gap or a larger store

Hosepipe ban and a water butt: stored rain and a can

How to install a water butt before you cut the downpipe

Slimline water butt vs collapsible PVC in a narrow gap

Sources

Sources checked for this comparison. Shelf prices and star lines are from the amazon.co.uk listings on 15 October 2026.

  1. RHS, collecting, storing and using rainwater (retrieved 15 October 2026)
  2. RoSPA, garden safety (retrieved 15 October 2026)
  3. Ofwat, hosepipe bans and non-essential use bans (retrieved 15 October 2026)
  4. Thames Water, temporary hosepipe ban (retrieved 15 October 2026)
  5. Water Industry Act 1991, section 76 (retrieved 15 October 2026)
  6. Waterwise, rainwater butts (retrieved 15 October 2026)
  7. BSI, BS EN 16941-1:2024 on-site non-potable water systems (retrieved 15 October 2026)
  8. Screwfix, how a water butt diverter works (retrieved 15 October 2026)