Modular RDWC 2.0 hydroponic kit, 2 to 18 pots

Regular price 189,00 €
Regular price Sale price 189,00 €
Number of pots Price Price per unit vs 3
2 189,00 € 94,50 €−4 %
3 295,00 € 98,33 €—
4 319,00 € 79,75 €−19 %
6 379,00 € 63,17 €−36 %
8 429,00 € 53,63 €−45 %
9 589,00 € 65,44 €−33 %
12 729,00 € 60,75 €−38 %
16 849,00 € 53,06 €−46 %
18 929,00 € 51,61 €−48 %
63,00 € × 3 with no fees

This RDWC system continuously circulates an oxygenated nutrient solution between double-walled 19 L pots, connected by a 32 mm push-fit circuit. It can be configured with 2 to 18 pots around a controller pot, pumps included, and is also available as a 2-pot version with watering rings. It is made in Italy and comes with a 2-year warranty.

Ref. SI-GRO2002·RDWC hydroponic system
Number of pots : 2
Version : Classique
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Delivery within 2 to 15 business days
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The summary

  • What it is: 19 L pots linked together, in which the roots sit permanently in a circulating solution.
  • What sets it apart: a 32 mm circuit, the easiest to assemble and dismantle of the two generations.
  • Ten configurations: from 2 to 18 pots in the classic version, and 2 pots in the version with irrigation rings; the 4-pot format fits in a 120 by 120 cm tent.
  • What you do: you measure and correct at the control pot, once for the whole network.
  • What you choose to go with it: the grow medium for the baskets, a complete hydroponic nutrient and something to read the pH.
  • Floor space: 80 x 65 cm for 2 pots, 80 x 105 cm for 4 pots, with 50 cm between two plants.

Recirculating deep water culture, 32 mm circuit, 2 to 18 × 19 L pots

The modular RDWC 2.0 hydroponic kit continuously circulates an oxygenated nutrient solution between 19 L pots, from 2 to 18 depending on the configuration. Its 32 mm circuit, the easiest to assemble and dismantle of the two generations, fits together without tools. Measuring and correcting are done at the single control pot, for the whole network.

In separate buckets, the pH, conductivity and temperature each change at their own pace, and after 3 weeks you are running as many different solutions as you have buckets. Linking the pots together solves this problem at the source: the solution circulates and mixes, and becomes a single body of water for all your plants, with only one level to top up and one pH to maintain.

🔄 One network, one body of water

Each 19 L pot is drilled in line at 38 mm and takes the 32 mm pipe that connects it to the next. At the end of the chain, the controller pot houses the water pump, which sends the solution back to the grow pots, and the return to this pump passes through an in-line filter flanked by two valves, which catches root fragments before they reach it. An air stone placed at the bottom of each pot maintains dissolved oxygen, and the loop runs without interruption. The levels then even out by themselves by gravity, provided all the pots sit on a perfectly level floor, as a difference of a few millimetres is enough to deprive the highest pot of its share.

The pot itself is moulded with a double wall, black inside and white outside. The black blocks light, without which algae cannot take hold in water loaded with nutrients. The white reflects the energy of the lamps and limits the warming of the solution, which matters in a closed tent where the heat has nowhere to go. It is made in Italy, and the 32 mm push-fit fittings slot together by hand, with no glue or hose clamp. A pot can therefore be removed from the system in a few seconds, to be cleaned or replaced, without touching the others or emptying the whole system.

🧪 Measuring in a single spot

With a connected network, measuring and correcting are done in one place. You dip your probe into the controller, take the reading, correct at the same spot, and the pump spreads your correction throughout the network within a few minutes. One reading a week is enough once the system is established, two in the first days after transplanting. In return, all your plants receive the same solution, so they are best at the same stage, since the needs of a flowering plant and those of a young seedling differ markedly.

The pH is read on the controller

The value applies to all the pots, since the water is the same throughout.

The fertilisers are poured into the controller

They should never be poured directly into a growing pot, where the dose would stay localised for a few minutes.

The level is topped up by the controller

It is the low point of the circuit, and the place where evaporation shows first.

Draining is done through the controller

It comes round every 7 to 14 days, so you can start again with a clean solution.

Light comes in from above

The black wall stops side light, but not the light that comes in through the lid. A badly fitted lid, a basket smaller than its hole or a half-open cover lets in enough light to turn the solution green within a few days. Check the closure of each pot after every transplanting, since the lid is then the only possible way in for light.

Clay pebbles and nutrients to get started

The grow medium for the baskets, a complete hydroponic nutrient and a means of reading the pH decide how your first week of growing goes. The 6 L clay pebbles are rinsed and put in place in a few minutes, and the nutrient kit with three 500 ml bottles covers a first full cycle on a small system.

🌡️ Summer heat

Warm water carries less dissolved oxygen, and dissolved oxygen is precisely what protects permanently submerged roots. The white wall limits heating, but it cannot stop the solution warming up in a room at 30 °C. If you grow in a greenhouse or an attic, the temperature of the solution becomes a value to monitor just as closely as the pH. The practical limit is around 24 °C, above which the fine root hairs turn brown and the risk of rot increases, even though the plant needs more oxygen than in the cool season. A thermometer left in the controller costs little and saves you from discovering the problem on the roots, once it has already taken hold.

🧰 Extending and maintaining the network

The fittings clip and unclip by hand, so a pot can be added or removed between two cycles without dismantling the rest. The pot extension is made for exactly this, and the grow bed on its own replaces a damaged tank. The limit is the flow rate of the pump already in place: beyond what it can push, the pots at the end of the chain receive less than the others. The clearest sign is the level in the last pot, which takes several minutes to catch up with the controller's level after a refill. Between cycles, also think about the two parts that wear out, because they cost little and halt a crop when they are missing: the 32 mm push-fit seals and the air stones. The former eventually start to weep, the latter to produce large bubbles instead of a fine cloud. A weeping seal can be spotted by the damp mark at the base of the fitting, often well before the level moves. A worn air stone is better replaced than cleaned, as its price does not justify the time spent, and its clogged pores make the air pump work harder for nothing.

🪴 The first fill

Set the system up dry first, with the pots lined up and the fittings pushed together, then fill it with clean water and let it run for an hour. This lets you check that every joint holds, that the levels even out, and that the pump supplies the last pot as well as the first. Rinse the clay pebbles until the water runs clear, fill the baskets, prepare the solution, adjust the pH last and transplant seedlings that have already rooted. A 6-pot system holds 105 litres of solution, and an 18-pot system holds 285, so the floor needs to be chosen before filling, never afterwards. A concrete slab, a load-bearing floor or a tiled floor are all suitable, whereas a simple tarpaulin laid over a wooden floor is much less so.

💦 The version with sprinkler rings

The 2-pot format is also available in a version with watering rings. Each grow pot receives a basket filled with clay pebbles, and the solution, lifted by the air from the pump, is spread drop by drop over the grow medium by a ring before falling back into the pot. The system keeps its controller pot and its water pump, which circulates the solution between the pots. Because air circulates between the pebbles around the roots, this version copes better with a solution that warms up, which makes it suited to large plants grown in a greenhouse, such as trained tomatoes.

Technical specifications

The essentials

Principle
Recirculating deep waterThe roots sit in the solution continuously, and the solution circulates in a loop.
Configurations
From 2 to 18 pots
Growing pot
19 L, double-walledBlack inside to block out light, white outside to reflect the light from the lamps.
Material
Food-grade polypropylene
Versions
Classic or with sprinkler ringsThe version with watering rings is available in 2 pots.
Ring watering
Drip irrigation onto clay pebblesThe air from the pump lifts the solution up to the ring of each pot.

Hydraulic

Pot drilling
38 mm inlineThis is the measurement that distinguishes a 2.0 pot from a PRO pot, drilled at 58 mm.
Pipework and seals
32 mm push-fitReplacement seals are ordered by this diameter, not by that of the pot.
Diffuser
1 air stone per potOn the standard version; the ring version waters by drip irrigation.
Inline filter
3/4 inch, between 2 valvesIt catches loose roots on the return to the pump.
Water pump
650 to 2,000 L/hIts flow rate follows the number of pots in the setup.
Assembly
Tool-free, can be dismantled

Origin and guarantee

Manufacturing
Italy, Robassomero
Warranty
2 years

To budget for separately

Grow medium for baskets
Clay pebbles or rockwool
Nutrition
1 complete hydroponic nutrition
pH reading
1 drop test or a meter
Rooted cuttings
Sown or propagated separately

10 further specifications are available in the detailed view.

In the box

  • The 19 L double-walled growing pots, in the number corresponding to the chosen configuration.
  • 1 monitoring pot of 19 L with its solid lid.
  • 1 submersible water pump and 1 air pump.
  • 1 in-line filter of 3/4 inch and its 2 valves, on the standard version.
  • 1 cylindrical air stone per grow pot, on the classic version.
  • 1 drip irrigation ring per growing pot, on the ring version.
  • The 32 mm pipes, the push-fit joints and the drilled lids of the network.
  • 1 net pot per pot, of 14 cm on the standard version.

Drilling dimensions, diameters, inline filter, pumps, volumes and footprints taken from the manufacturer's datasheets and the RDWC 2.0 assembly manual on 08/10/2026. Version with spray rings taken from the manufacturer's website on the same date.

Manufacturer and product safety

Manufacturer
Growrilla di Milone Giulio
Postal address
Via Fiano 207, 10070 Robassomero (TO), Italie

Information provided under Regulation (EU) 2023/988 on general product safety.

Two generations of RDWC

The same principle and the same 19 L pot. This table only compares what changes from one generation to the next.

The 2.0, the entry-level generation of the range The professional range gives you a larger circuit, a filter and level control. All of this is only worthwhile if your setup needs it: the questionnaire looks at your situation first, not the equipment.

Pipework diameter (mm)Pot drilling (mm)Inline filterFloat valve to controllerMinimum pots (pots)Maximum pots (pots)Volume per potPrice
Recommended
RDWC 2.0Your choice		32 mm38 mm3/4 inchNo2 pots18 pots19 L189,00 €
RDWC PROYour choice50 mm58 mm1 inchYes3 pots24 pots19 L425,00 €
RDWC 2.0Recommended
Circuit
Pipework diameter (mm)32 mm
Pot drilling (mm)38 mm
Inline filter3/4 inch
Float valve to controllerNo
Capacity
Minimum pots (pots)2 pots
Maximum pots (pots)18 pots
Common to both
Volume per pot19 L
RDWC PRO
Circuit
Pipework diameter (mm)50 mm
Pot drilling (mm)58 mm
Inline filter1 inch
Float valve to controllerYes
Capacity
Minimum pots (pots)3 pots
Maximum pots (pots)24 pots
Common to both
Volume per pot19 L

Diameters, drilling dimensions, filters and valves taken from the manufacturer's data sheets and assembly manuals, on 08/10/2026.

Estimate your
delivery time

Dispatch takes place from the workshop in Robassomero, near Turin. The number of parcels depends on the configuration ordered, and the 19 L pots take up considerable volume for a modest weight. Plan for home delivery and have someone available to receive it. Exact shipping costs and final delivery times are shown at checkout once your address has been entered. Outside the European Union, import duties and taxes remain the responsibility of the recipient.

Frequently asked questions

10 questions

6 key questions, 10 in the detailed view

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