Flood & Drain Systems
Explore our range of flood and drain systems and components, designed for efficient hydroponic growing. These systems provide reliable irrigation, improved root oxygenation, and consistent nutrient delivery, helping support healthy plant growth.
Here at The Greenhouse Effect, we stock everything you need in one place. From complete systems to individual trays and accessories, we’ve got everything you need to grow with confidence.
Alien Flood & Drain PRO Silver Series 30 Litre
Original price was: £974.99 – £9,744.99Price range: £974.99 through £9,744.99. Price range: £877.49 through £8,770.49Current price is: £877.49 – £8,770.49Price range: £877.49 through £8,770.49.
Select options
This product has multiple variants. The options may be chosen on the product page
Alien Flood & Drain PRO Silver Series 15 Litre
Original price was: £924.99 – £7,744.99Price range: £924.99 through £7,744.99. Price range: £832.49 through £6,970.49Current price is: £832.49 – £6,970.49Price range: £832.49 through £6,970.49.
Select options
This product has multiple variants. The options may be chosen on the product page
IWS Flood & Drain Trident 25L
Original price was: £749.99 – £2,079.99Price range: £749.99 through £2,079.99. Price range: £674.99 through £1,871.99Current price is: £674.99 – £1,871.99Price range: £674.99 through £1,871.99.
Select options
This product has multiple variants. The options may be chosen on the product page
IWS Flood & Drain Trident 16L
Original price was: £719.99 – £1,839.99Price range: £719.99 through £1,839.99. Price range: £647.99 through £1,655.99Current price is: £647.99 – £1,655.99Price range: £647.99 through £1,655.99.
Select options
This product has multiple variants. The options may be chosen on the product page
IWS 10 Litre Pro Remote System with Flexi Tank
Original price was: £649.99 – £1,739.99Price range: £649.99 through £1,739.99. Price range: £584.99 through £1,565.99Current price is: £584.99 – £1,565.99Price range: £584.99 through £1,565.99.
Select options
This product has multiple variants. The options may be chosen on the product page
IWS 25 Litre Pro Remote System with Flexi Tank
Original price was: £719.99 – £1,459.99Price range: £719.99 through £1,459.99. Price range: £647.99 through £1,313.99Current price is: £647.99 – £1,313.99Price range: £647.99 through £1,313.99.
Select options
This product has multiple variants. The options may be chosen on the product page
IWS 16 Litre Pro Remote System with FlexiTank
Original price was: £649.99 – £1,399.99Price range: £649.99 through £1,399.99. Price range: £584.99 through £1,259.99Current price is: £584.99 – £1,259.99Price range: £584.99 through £1,259.99.
Select options
This product has multiple variants. The options may be chosen on the product page
IWS 10 Litre Standard Remote with FlexiTank
Original price was: £539.99 – £1,149.99Price range: £539.99 through £1,149.99. Price range: £485.99 through £1,034.99Current price is: £485.99 – £1,034.99Price range: £485.99 through £1,034.99.
Select options
This product has multiple variants. The options may be chosen on the product page
IWS 16 Litre Standard System with FlexiTank
Original price was: £409.99 – £999.99Price range: £409.99 through £999.99. Price range: £368.99 through £899.99Current price is: £368.99 – £899.99Price range: £368.99 through £899.99.
Select options
This product has multiple variants. The options may be chosen on the product page
IWS 10 Litre Standard System with FlexiTank
Original price was: £399.99 – £989.99Price range: £399.99 through £989.99. Price range: £359.99 through £890.99Current price is: £359.99 – £890.99Price range: £359.99 through £890.99.
Select options
This product has multiple variants. The options may be chosen on the product page
IWS Flood and Drain Brains
Original price was: £199.99 – £389.99Price range: £199.99 through £389.99. Price range: £179.99 through £350.99Current price is: £179.99 – £350.99Price range: £179.99 through £350.99.
Select options
This product has multiple variants. The options may be chosen on the product page
IWS Pro FlexiTank Complete
Original price was: £169.99 – £324.99Price range: £169.99 through £324.99. Price range: £152.99 through £292.49Current price is: £152.99 – £292.49Price range: £152.99 through £292.49.
Select options
This product has multiple variants. The options may be chosen on the product page
Terra Aquatica Ebb & Grow
Original price was: £239.99.£215.99Current price is: £215.99.
IWS Standard FlexiTank Complete
Original price was: £124.99 – £229.99Price range: £124.99 through £229.99. Price range: £112.49 through £206.99Current price is: £112.49 – £206.99Price range: £112.49 through £206.99.
Select options
This product has multiple variants. The options may be chosen on the product page
IWS FlexiTank Only
Original price was: £49.99 – £219.99Price range: £49.99 through £219.99. Price range: £44.99 through £197.99Current price is: £44.99 – £197.99Price range: £44.99 through £197.99.
Select options
This product has multiple variants. The options may be chosen on the product page
IWS Flood and Drain Remote Timer Only
Original price was: £149.99.£134.99Current price is: £134.99.
IWS Pro Pump Kit Only
Original price was: £119.99.£107.99Current price is: £107.99.
Select options
This product has multiple variants. The options may be chosen on the product page
IWS Standard Pump Kit Only
Original price was: £74.99 – £84.99Price range: £74.99 through £84.99. Price range: £67.49 through £76.49Current price is: £67.49 – £76.49Price range: £67.49 through £76.49.
Select options
This product has multiple variants. The options may be chosen on the product page
Newa Jet NJ3000 Water Pump for IWS Pro Systems
Original price was: £79.99.£71.99Current price is: £71.99.
MJ1000 Pump for IWS
Original price was: £54.99.£49.49Current price is: £49.49.
IWS Trident Add on Modules
Original price was: £21.99 – £26.99Price range: £21.99 through £26.99. Price range: £19.79 through £24.29Current price is: £19.79 – £24.29Price range: £19.79 through £24.29.
Select options
This product has multiple variants. The options may be chosen on the product page
IWS Trident Spares
Original price was: £1.50 – £15.99Price range: £1.50 through £15.99. Price range: £1.35 through £14.39Current price is: £1.35 – £14.39Price range: £1.35 through £14.39.
Select options
This product has multiple variants. The options may be chosen on the product page
IWS 10 Litre Pot Stand
Original price was: £4.50.£4.05Current price is: £4.05.
IWS Pro Fittings – 25mm
Original price was: £0.30 – £4.49Price range: £0.30 through £4.49. Price range: £0.27 through £4.04Current price is: £0.27 – £4.04Price range: £0.27 through £4.04.
Select options
This product has multiple variants. The options may be chosen on the product page
IWS Spanners
Original price was: £3.50.£3.15Current price is: £3.15.
Select options
This product has multiple variants. The options may be chosen on the product page
IWS Standard Fittings
Original price was: £0.75 – £1.49Price range: £0.75 through £1.49. Price range: £0.68 through £1.34Current price is: £0.68 – £1.34Price range: £0.68 through £1.34.
Select options
This product has multiple variants. The options may be chosen on the product page