IWS Flood and Drain Pro Remote 25mm – Recirculating System
IWS Flood and Drain Pro Remote 25mm – Recirculating System
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Description
Automated Feeding, Built for Scale
The 25mm IWS Flood and Drain Pro Remote is a proven recirculating system for growers who want big results with minimal daily input. The brain floods the pots at the feed times you set, integrated float switches cut the flood at the exact height your pots need, and the drain pumps then return the remaining solution to the reservoir quickly and quietly, re-oxygenating it on the way. That fast drain cycle keeps oxygen at the roots between feeds, avoiding the waterlogged root zone that causes slow growth and poor nutrient uptake. Kits run from 6 to 48 plants with 25mm pipework throughout and a 3,000 L/h tank pump, and the 48 plant kit comes with a choice of 400L or 750L FlexiTank - the bigger tank holds more solution between top-ups and steadies EC and pH across a large room.
What's Included
- Brain control unit - the intelligence behind every IWS system
- Drain pumps and water level controllers
- 10 litre outer pots to suit your chosen plant count
- Flexible water butt sized to the system (IWS FlexiTank), with the Pro tank pump and pipework
- 9.5 litre punched inner pots, one per plant
- Pot stands and copper discs for every pot
- All fittings and pipe in 25mm
- 1 minute remote feeding timer with dial, power LED, feed pump LED and drain LED
Key Benefits
- Feed times from 1 to 60 minutes, cancellable at any point
- Automatic flood height set by float switches, so pots never over- or under-fill
- Re-oxygenated solution as the drain pumps return it to the reservoir
- Scales from 6 to 48 plants with matched 100L, 250L, 400L or 750L FlexiTanks
- 25mm Pro pipework for faster fill and drain across bigger systems, fed by a 3,000 L/h tank pump
- Clear status indication from power, feed and drain LEDs at a glance
How to Use
- Position the outer pots and control pot, then connect the 25mm pipework
- Site the FlexiTank and connect the pump kit
- Set the float switches to the flood height your pots require
- Dial in feed duration on the remote timer, from 1 to 60 minutes
- Use the 'O' position to override feeds off, the centre position to follow the timer, and 'I' to run permanently on
- Check reservoir pH and EC at every top-up
Pallet Delivery
This is a large system and ships on a pallet. A £40.00 pallet delivery surcharge applies to UK mainland orders, and £49.95 to Northern Ireland. The surcharge is added at checkout, and free delivery over £99 does not apply to pallet items.
Technical Specifications
- Brand: IWS (Global Air Supplies)
- System type: recirculating flood and drain, Pro Remote
- Control: IWS Pro control unit (brain) with remote minute timer
- Timer: segmental start times; feed duration dial up to 60 minutes, set by the minute
- Timer controls: power, feed pump and drain LEDs
- Pumps: 3,000 L/h tank feed pump and 3,000 L/h drain pump
- Tank pump: IWS NJ3000 long-lead assembly with Bulgin connector
- Pipework: 25 mm IWS Pro pipe and fittings
- Outer pots: 10 litre, on IWS pot stands
- Inner pots: 9.5 litre punched pots (6.5 litre Aqua and Culture inners sold separately)
- Root control: copper mat in each pot
- Included: control unit, remote timer, FlexiTank, outer pots, punched inner pots, pot stands, copper mats, 25 mm fittings and pipe
- Suitable media: clay pebbles, coco, or a mix of both
| By size | 6 Pot - 100L FlexiTank | 12 Pot - 250L FlexiTank | 18 Pot - 250L FlexiTank |
|---|---|---|---|
| Pots | 6 x 10 L | 12 x 10 L | 18 x 10 L |
| FlexiTank | 100 L | 250 L | 250 L |
| By size | 24 Pot - 400L FlexiTank | 36 Pot - 400L FlexiTank |
|---|---|---|
| Pots | 24 x 10 L | 36 x 10 L |
| FlexiTank | 400 L | |
| By size | 48 Pot - 400L FlexiTank | 48 Pot - 750L FlexiTank |
|---|---|---|
| Pots | 48 x 10 L | |
| FlexiTank | 400 L | 750 L |
Frequently Asked Questions
400L or 750L tank for 48 plants?
Both run the same 48 plant system. The 750L FlexiTank holds nearly twice the solution, so it needs topping up less often and its EC and pH drift more slowly as large plants drink; choose the 400L if floor space beside the system is tight. Assembled, the 750L stands about 90cm wide and 117cm tall.
What is the difference between the Pro Remote and the Standard systems?
The Pro Remote uses 25mm pipework and a 3,000 L/h pump, so pots fill and drain faster - IWS recommend it for bigger rooms. The Standard systems run on 16mm pipework.
Which growing medium should I use?
Clay pebbles are the classic flood and drain medium because they hold plenty of air. Mixing in 20 to 40% coco makes the pots hold more water, so you can flood less often.
Can the timer sit outside the grow room?
Yes. The 1 minute timer is remote from the brain and connects to it by cable, so feed duration can be changed without opening the room.
Works Well With

FREE Express Delivery on orders over £99. We aim to post same day on Express Delivery — order by 3pm Mon–Fri — and delivery takes 1–2 working days. A few harder-to-stock or large, bulky items can take a little longer — we'll tell you if that applies to your order. Heavy-item surcharges are always shown at checkout before you pay — we only ever charge what delivery costs us. Prefer to collect? Free pickup at our Wembley store.




