Free Delivery, when you spend £50
Interest Free Payments with
Buy now pay later with

IWS Pro DWC System with 25mm Icetube Pipe

All out, I'll be back in stock soon
Delivery within 1-3 working days
Only %1 left
  • IWS (Intelligent Watering Systems) - top British Hydroponics Systems Manufacturer
  • Delivers rapid growth rates by heavily oxygenating roots
  • Supplied with extra-large 25mm Icetube Pipe
  • Drains nutrients back to the tank quicker than regular piping
  • Minimises the likelihood of encountering bloackages
  • Saves time – mix only one set of nutrient for multiple bubblers
  • Supplied with a Flexi Tank for portability and storage
  • Excellent quality at an affordable price
  • Your choice of either 6, 12, 18, 24 or 36 pot systems
  • Intelligent 'Brain Pot' takes care of topping up each bubbler
  • Highly adaptable, thanks to its modular design

DWC Technology Complete with 25mm Icetube Pipe, for Cooler Nutrient Temps and Massively Reduced Chances of Encountering a Blockage

The IWS Pro DWC System saves you time and effort, while delivering incredible growth rates. By connecting each bubbler to the IWS Brain and a Flexi Tank reservoir, you can manage multiple plants simultaneously, from the same place. Deep water culture systems deliver extremely high levels of oxygen via airstones, promoting vibrant health and vigour. With 25mm pipe, the Pro version drains quicker than its 13mm counterparts, and the likelihood of encountering a blockage is massively reduced. This version also comes with Icetube Pipe, which helps to reduce nutrient temperatures in the system, thanks to its white reflective outer layer and its black core.


How the IWS DWC System Works

Deep water culture (DWC) is a popular growing technique where roots are suspended in net pots over heavily oxygen infused nutrient solution in what is commonly referred to as 'bubbler'. Using deep water culture as a growing method has a long list of benefits. For a start, there's less medium to deal with, with only a small quantity of clay pebbles required to support initial root growth within the net pot. This means that waste is kept to an absolute minimum. Root systems thrive in heavily oxygenated water and produce amazing results with notable increases in yields.

However, when dealing with larger numbers of bubblers, nutrient solution changes, checks and general maintenance can become a bit of pain when each unit is attended to individually. IWS Bubbler Kits solve all of these problems in one fell swoop by connecting each bubbler to a reservoir tank. The float switch technology developed in their flood & drain kits has been put to use here to fill, empty and top up individual bubblers according to a programmed schedule. You no longer have to deal with separate containers; just make up nutrient solution for the reservoir and let the brain do the rest. Because nutrients can be drawn back to the reservoir for periods at different times of the day, solutions become properly mixed and are spread evenly across each bubbler in the system at all times.

The Flexi Tank has been tested to absolute destruction and has never faltered yet. The team behind IWS have invested in an extremely heavy research program; test after test has been performed and at no point has the Flexi Tank ever given way. They offer all of the functionality of a standard water butt, but can be packed away into a tiny space. They're easier to transport and can be stored in a fraction of the area that typical reservoirs can. IWS are heavily behind the Flexi Tank and we can see why.

What's Different About the Pro Version?

IWS Pro DWC systems come with 25mm pipe and fittings. With larger piping, you can drain nutrients back to your reservoir more quickly, which minimises the length of time that roots need to spend without nutrient solution. Drain times are especially important on systems with larger numbers of Oxypots. Using larger pipework also helps to prevent blockages in the system, reducing the liklihood of encountering a major issue.

The Benefits of Icetube Pipe

Icetube pipe lowers the temperature of the nutrient solution in your system using a simple but effective dual-core design. A white outer layer reflects light and lowers heat levels within the pipe, while the black inner layer protects against UV. This has a profound effect on the overall temperature of your nutrients. Lower nutrient temps (18°C) mean fewer problems and healthier plants. If nutrient temps exceed 21°C, the quantity of dissolved oxygen that your nutrient solution can hold is drastically reduced and your reservoir becomes a breeding ground for pathogenic bacteria and fungi. Every degree counts, especially during the summer – Icetube piping could well be the difference between a completely failed crop and a bumper harvest.

To see our full DWC & Undercurrent Systems range, click here


  • IWS Flexi Tank and Tank Assembly (6-Pot: 225 litre, 12-Pot & 18-Pot: 400 litre, 24-Pot & 36-Pot: 750 litre)
  • IWS DWC Brain Pot
  • 25mm Icetube Pipe
  • IWS Oxypot V3
  • IWS 25mm fittings

Recommended additional purchases

Air pump and airstone kits are available separately. Find a kit to match your system here.

Adding Silver Bullet Roots to your tank will keep your nutrient solution sterile and disease-free.

Plant Magic's DWC nutrient has been formulated to get the very best out of deep water culture systems. 

How to Use the IWS DWC System

The IWS DWC system is simple to put together and use. You will find the following items useful: A sharp knife or scissors for cutting the IWS pipe, a spanner for tightening nuts and a suitable container of hot (half-boiled) water to soften the end of piping to make it easier to fit onto elbow, tee and straight connectors.

The brain pot and the Oxypots need to be installed on the same surface. The surface also needs to be level otherwise the system will either under or over-fill the pots.

First, you will need to assemble the Flexi Tank. This is a very quick and easy process: unfold and open up the waterproof material outer, insert the supporting poles into the side sleeves and fit the feet to the undersides of each pole. 


When running your IWS DWC System, NEVER refill the reservoir while the bubbler buckets are filled. If you do this, when you draw water back to the reservoir, water could overflow beyond the reservoir's capacity and cause a potential hazard.

Once your IWS System has been set up according to our guide, you will have one of the best hydroponic systems available anywhere. Remember to keep your system clean and free of salt build-ups by using a product such as Dutch Pro Keep It Clean or House and Garden Drip Clean.

Preventing Water Damage: even with a carefully set up hydroponic system, accidents can happen, often resulting in a considerable amount of water to be released onto the floor. Plan ahead and plan for the worst. For example, sit your system in a high-sided garden/gravel tray, or use our floor-secure sheeting on your grow-room floor. It can be fitted so that it rides up each wall by a few inches, creating a “floor-basin" which could help prevent a huge amount of water damage if the worst should ever happen. In this regard it is much better to be safe than sorry!

This kit is not designed to use water level indicators - the brain takes care of this for you. If you wish to add water level indicators, you can customise your Oxypots by drilling separate holes and fitting separate glands and elbows.

Our grow systems are designed to provide years of trouble free use, but for complete peace of mind, secure pipework that's joined onto barbed fittings using jubilee clips or cable ties, and place run-off trays / floor secure sheeting underneath the system. It's much better to be safe than sorry.

Run-Off & Work Trays
Floor Secure Sheeting


Write Your Own Review
You're reviewing:IWS Pro DWC System with 25mm Icetube Pipe