AutoPot: Gravity-Fed Watering That Needs No Power or Mains Water

If you grow even a few herbs or vegetables, a power cut or a hosepipe ban can leave them thirsty at the worst moment. AutoPot makes watering systems that run on gravity alone: no electricity, no pump, no mains water pressure and no timers. You raise a reservoir or water butt, fill it, and each pot draws what it needs through a device called an AQUAvalve¹.

The maker's flagship kit for a household is the 4Pot System: four 15 litre pots, each with its own AQUAvalve, fed from one reservoir. The maker says it needs no mains water and no electricity, and that you set it up, fill the reservoir, switch on, and it waters and feeds your plants automatically². For a household thinking about a power cut, a dry summer or a stretch away from home, that means your crops keep going when the taps, the pump or the mains fail.

This page sets out what AutoPot makes, how the gravity feed works, how high the reservoir must sit, what each kit type does, and how to handle the plant food safely. It is written for a UK household building a bit of food self-reliance into its emergency plan, not for a commercial grower.

What AutoPot makes, and why it suits a household preparing for disruption

AutoPot UK describes itself as a maker of plant pots and water tanks built on patented, power-free technology, serving everyone from the home gardener with a single pot to commercial growers with thousands of pots, including hydroponic growers and commercial cultivators¹. For a household, the relevant part is the home end of that range: small systems that keep a few food plants alive without relying on the mains.

That matters in an emergency because the usual ways of watering a garden all depend on something that can fail. A hose needs mains pressure. A pump needs electricity. A timer needs both. An AutoPot system needs a raised tank of water and gravity, so it keeps working in a power cut, during a hosepipe restriction, or while you are away from home. The maker says the systems require no power, pumps, mains water pressure or timers, just gravity from a reservoir or water barrel, and that because they need no electricity and no running water you can set up pretty much wherever you please and walk away with no fear of leaving utilities switched on¹.

The maker also states that its systems can reduce water and nutrient usage by up to 50%, and that they can often be left unattended for weeks¹. Both are the maker's own claims rather than independent test results, so treat them as a guide to what the design is for, not a promise for your particular garden.

If you are building food-growing into a wider plan, the self-reliance guide covers growing food, hens, bees, rainwater and off-grid power as a whole, and this page sits inside it as the watering piece.

How it works: gravity from a reservoir and an AQUAvalve per pot

The system has two parts. A reservoir or water butt holds the water and feed. Each pot has its own AQUAvalve, a water control device that lets water in from the reservoir when the pot needs it and stops it when it does not². Because the water moves by gravity, the reservoir must sit higher than the pots.

The maker's rule is simple: elevate your reservoir or water butt 150cm above the lowest AQUAvalve in your system and you will have ample gravity flow¹. That is the single most important measurement in the whole set-up. If the tank is too low, the valves will not get enough pressure to work properly.

The practical consequences for a household are worth spelling out. First, where you put the system is decided by the height rule, not by where the tap is: you need a stable, level spot for the raised tank, and the pots below it. Second, the reservoir is your only water store, so its size sets how long the system runs between refills. Third, because there is no electricity, there is nothing to fail in a power cut and nothing to switch off before you leave.

Reservoir height: at least 150cm above the lowest AQUAvalve

The 150cm figure is the maker's minimum for ample gravity flow, measured from the lowest AQUAvalve in the system, not from the top of the pots¹. Get this right and the rest follows. Get it wrong and the valves may not open and close as they should.

A few things to check before you fill anything:

• Measure to the lowest valve. In a system with pots at different heights, the lowest AQUAvalve is the one that sets the requirement.
• Make the stand stable. A full reservoir is heavy, so the support needs to carry it safely and sit level.
• Keep the feed runs short and clear. Pipes from the tank to the pots should not kink or run uphill.
• Leave room to refill. You will be lifting water to the tank, so plan how you will do that without climbing on chairs or stools.

That last point is a household safety matter as much as a gardening one. Official guidance on avoiding falls at home says to store frequently used items between waist and shoulder height where possible and not to climb on chairs or stools to reach cupboards³. The same principle applies to a reservoir you will refill regularly: site it so you can reach the fill point safely, and use a stable step or a helper rather than a chair.

The 4Pot System: four pots with no mains water or electricity

The 4Pot System is the complete automatic watering kit that contains everything you will need to grow four plants, with four 15 litre pots, each served by its own AQUAvalve water control device². The maker describes it as power-free, with no mains water required, and says it is endorsed by the Royal Horticultural Society (RHS)².

For a household, four 15 litre pots is a realistic size for a patio, a balcony or a corner of a garden: enough for a few tomato plants, some herbs and a leafy crop, not enough to feed a family. Think of it as a fresh-food top-up that keeps producing when the shops are disrupted or the garden would otherwise go dry.

The maker says the 4Pot can easily be expanded with AutoPot 1Pot extension kits². That is the simplest way, in effort rather than money, to grow the system over time: start with four pots, add one at a time as you learn what your household eats. Remember that every added pot draws from the same reservoir, so a bigger tank or more frequent refills will follow.

1Pot, XL and XXL systems for single plants and larger pots

The 4Pot is one point on a range. The maker's site covers 1Pot systems and extension kits alongside the multi-pot kits, so a household can start with a single pot and build up². The logic of the range is straightforward: one AQUAvalve per pot, one reservoir feeding them all, and the number and size of pots chosen to fit your space.

For a household, the choice usually comes down to three questions:

• How much do you want to grow? A single 1Pot suits one hungry plant such as a tomato or a courgette. The 4Pot suits a small mix.
• How much space and height do you have? Every pot needs to sit below the reservoir, so a taller stand means more headroom for the plants.
• How often can you refill? More pots and bigger pots empty the reservoir faster.

The XL and XXL systems are for larger pots and larger plants, which suits a household with more growing space or a crop that needs a deeper root run. The maker's product pages give the pot sizes and contents for each kit, so check those against your space before you choose.

FlexiTank reservoirs: 50 and 100 litres

The reservoir is the heart of the system, and AutoPot makes FlexiTank reservoirs in 50 and 100 litre sizes. The size you choose sets how long the system can run between refills: a bigger tank means fewer top-ups and more time away.

For emergency planning, the reservoir is also a water store in its own right. A filled tank is water you already have on site, held above the pots and ready to feed them. That does not make it drinking water, and it should not be treated as part of your household drinking supply, but it does mean your food plants are not competing with the taps when water is short.

Match the tank to the job:

• 100 litres gives more slack for a 4Pot System or a modest extension.

Whichever you choose, the 150cm height rule still applies, and a full tank is heavy, so the stand must be built for the weight¹.

Tray2Grow, easy2grow and propagation kits

Beyond the pot systems, AutoPot makes tray-based and propagation kit. The AutoPot Tray2Grow System is the tray option: instead of individual pots, plants sit in a tray fed by the same gravity principle. That suits a household growing a block of salad leaves, herbs or seedlings that want even moisture across a bed rather than one pot at a time.

The easy2grow and propagation kits serve the earlier stages: raising seedlings and young plants before they go into a bigger system. For a household plan, that matters because it lets you keep a cycle going. If a crop fails, or a season turns, you can raise replacements without buying in new plants.

The same rules apply across these kits: a raised reservoir, an AQUAvalve doing the water control, and no need for power or mains pressure¹. Check the maker's page for each kit for what it contains and how many plants it holds.

AQUAplate, AirDome and Heat Shield add-ons

AutoPot sells add-ons that change how a pot behaves. The AQUAplate, AirDome and Heat Shield are the ones a household is most likely to meet.

• AQUAplate sits in the pot and helps manage the watering surface, so the pot wets evenly rather than in one spot.
• AirDome feeds air to the root zone, which suits plants that benefit from a well-aerated root run.
• Heat Shield reflects heat away from the pot, which helps in a hot spell or against a warm wall.

For a household preparing for disruption, the Heat Shield is the one with the clearest emergency link: in a hot summer, keeping the root zone cooler helps plants survive a heatwave when you cannot water by hand. The heatwaves and drought guide covers the wider household response to hot, dry conditions.

Add-ons are optional. The core system works without them, so treat them as refinements once the basic set-up is running well.

Feeding and tray pH: aim for 6.0 to 6.5

The maker's guidance is to aim for a tray pH of 6.0 to 6.5 when feeding through the tray. That range is where most garden crops take up nutrients well, so it is worth checking if plants look pale or slow despite a full reservoir.

A simple routine keeps the system healthy:

1. Mix the feed to the maker's instructions for the product you are using.
2. Check the tray pH and aim for 6.0 to 6.5.
3. Top up the reservoir before it runs dry, rather than after.
4. Watch the plants, not just the tank: yellowing or wilting tells you something is off.

If you are growing food as part of a household plan, the emergency food guide covers stores, safety and meals without power, and the water guide covers household water storage. The AutoPot reservoir is a garden store, not a drinking store, so keep the two separate.

Handling AutoPot plant food safely

Plant food is a chemical product, and the same household rules apply as for any other. Official guidance for keeping children safe at home sets out a Keep SAFE 6 Rule: safe storage, keeping things out of reach and out of sight, including medicines, oils, vape liquids, perfumes and laundry products; safe containers, storing medicines in locked containers and always using safety caps; safe labels, keeping medicines in their original packaging; safe use, always using products and medications as directed and never pretending they are sweets; safe disposal, taking medicines and other products to the pharmacy for proper disposal or following the instructions on the packaging; and a safe home, with a working carbon monoxide detector⁴.

For plant food in a household with children or pets, the practical version is:

• Store it out of reach and out of sight, in its original labelled container.
• Keep the original label on, so anyone using it knows what it is and how to use it.
• Use it as directed on the label, and never decant it into a drinks bottle or food container.
• Dispose of it as the label says, not down the sink unless the label allows it.

Support, warranty and safety notices

AutoPot UK offers an Ask Josh feature on its website for product-related questions¹. Use it for anything about setting up, extending or running your system, and have your kit details ready so the answer fits what you own.

The maker states that the 4Pot System is 100% U.K. manufactured from recycled plastics and is shipped in plain packaging². That is useful if you want to know where your kit comes from and how it arrives.

On safety notices, there is no AutoPot recall or safety alert. That recall is not about AutoPot, but it is a reminder to check any pump or electrical kit you use alongside a watering system against official recall notices.

Where it fits a household plan

An AutoPot system is a small, quiet piece of self-reliance. It keeps a few food plants alive through a power cut, a dry spell or a holiday, using water you have already stored and gravity you already have. It does not replace your household water store, your emergency food store or your plan for a power cut, but it adds fresh produce to the mix when the shops are disrupted.

If you are starting out, the getting started guide sets out how to prepare a household step by step, and the backup power guide covers what to do when the electricity fails. The AutoPot sits alongside those: a system that keeps working precisely because it needs neither.