For Help & Advice: 0117 971 3000
Greens Horticulture - Serving Growers All Over The UK

IWS PRO Flood & Drain Systems

Regular price £700.16 £777.95 | Save £77.79 (9% off)
Tax included. Shipping calculated at checkout.
SKU: 4183
Spend £50.00 more for free delivery (shipping surcharges still apply)

IWS PRO Flood & Drain Systems

PRO - 6-Pot - £700.16
  • PRO - 6-Pot - £700.16
  • PRO - 12-Pot - £814.46
  • PRO - 18-Pot - £942.26
  • PRO - 24-Pot - £1,070.96
  • PRO - 36-Pot - £1,291.46
  • PRO - 48-Pot - 400L Flexitank - £1,511.96
  • PRO - 48-Pot - 750L Flexitank - £1,568.66

IWS PRO Flood & Drain Systems


The IWS Flood & Drain System is a versatile nutrient delivery solution designed to fit nearly any grow space. Fully modular and adaptable, this system allows for easy addition, removal, and rearrangement of pots at any time.

Key Features:

  • Modular and Adaptable:

    • Pots can be added, removed, or rearranged to fit your grow space.
    • Fully automated feeding system simplifies the care of large numbers of plants.
  • Custom IWS FlexiTank:

    • Offers all the functionality of a standard water butt.
    • Can be packed away and stored in small spaces when not in use.

How It Works:

  • Nutrient Delivery:
    • Nutrient solution is pumped from the FlexiTank to the IWS Control Unit based on user-set times and durations with the IWS Timer.
    • The Control Unit connects via pipework to the pots, filling them until the top float valve engages, stopping nutrient flow to prevent flooding.
  • Pot Structure:
    • Each pot consists of an outer pot and an inner pot.
    • The outer pot connects to the system’s pipework to deliver the nutrient solution.
    • The inner pot, containing the substrate and root mass, sits inside the outer pot to ensure contact with the nutrient while keeping the media contained.

Why Use Flood & Drain?

  • Efficient Nutrient Delivery:

    • Flooding the pots with nutrient solution surrounds the roots, enhancing nutrient absorption.
    • The flooding process forces stale air out and replaces it with fresh oxygen during drainage, invigorating the root mass.
  • Prevents Water Logging:

    • User-defined flooding intervals prevent root diseases and lock oxygen in the root zone, driving nutrient uptake and promoting growth.
  • Minimal Management:

    • Once set, the system can run for weeks before needing a water refresh in the FlexiTank.
  • Automation and Control:

    • Easy to automate with timers for consistent flooding schedules.
    • Suitable for indoor environments.
  • Versatility:

    • Compatible with various growing mediums.
    • Available in configurations from 6 to 48 pots, ideal for space-limited indoor setups.
  • Easy Maintenance:

    • Simple to maintain and clean, reducing disease risk and promoting a healthier growing environment.

About the IWS Flood & Drain Pro Remote System:

  • Enhanced for Larger Setups:
    • Ideal for larger numbers of pots or quicker flood and drain cycles.
    • Utilizes 25mm fittings and pipe with a 3000-liter per hour pump for faster filling and draining.

Why Choose the IWS Flood & Drain Pro Remote?

  • Precise Timer Control:

    • Timer controllable to 1 minute and can be located outside the grow room.
    • Provides faster filling and drainage.
    • Precise control over the duration the root mass is submerged in nutrient solution.
  • High-Performance Pump:

    • 3000-liter per hour nutrient feed pump.
    • Kits available from 6 to 48 pots.

Kit Contents:

  • Complete Setup:
    • Control Unit
    • Outer Pots
    • Inner Punched Pots
    • FlexiTank
    • 25mm Fittings and Pipe
    • Remote Timer
    • Pot Stands
    • Copper Mats

Inner Pot Options:

  • Aqua Pot: 6.5L for clay pebbles
  • Culture Pot: 6.5L for any media
  • Punched Pot: 9.5L for any media

All IWS systems come with punched pots as standard.

The IWS Flood & Drain System is perfect for indoor hydroponic growers seeking an efficient, adaptable, and easy-to-maintain nutrient delivery solution.

***Please note we only ship this product to the UK mainland - Please allow 3-5 working days for delivery.***



Delivery Information

Most orders are shipped within 24 hours.

Orders are currently shipped with Parcelforce (Express 24 service for standard and heavy/bulky items) or DPD Local (Premium next-day), a signature will be required on delivery. We have been shipping orders for 15 years and our courier choices are subject to change as service levels fluctuate.

All orders are shipped on a next day courier service – you will be informed via email or SMS the evening your order leaves us so you know to expect it the next day. On the morning of delivery you will get another SMS or email informing you of the expected delivery time.

If you have any questions on delivery please get in touch.

As the website calculates some charges by weight it is possible that shipping is not calculated correctly. We reserve the right to get in touch in these circumstances we will request the additional amount or offer to refund the order.

UK Delivery

Standard delivery to the UK Mainland addresses (excluding Scottish Highlands & Islands, offshore and N.I.) is charged at a flat rate of just £5.95 per order or £7.95 (for the premium next-day service), standard delivery (with Parcelforce) is free* for orders over £50.

*Large and/or heavy items attact a surcharge from our courier - shipping surcharges are calculated per item and are applied regardless of order value.

Non-UK mainland destinations are charged by weight.

International Delivery

Coming soon…

Collect in Store (Bristol)

We now offer a 'collect in store' option, which allows you to pay for goods online and collect from our Bristol store at time that suits you (within our opening hours).

The process is simple:

  1. place your order and pay online, select 'Pick Up' at checkout;
  2. receive an email confirming that the order is ready for collection;
  3. bring/show your confirmation email and photo ID to collect your order.


Recently Viewed Products

Special instructions for seller
Add A Coupon

What are you looking for?

Popular Searches: Plant Lighting  LED Lighting  Bud Box Grow Tent  Carbon Filters