Water Pumps and Chillers

A reliable water pump is the circulatory system of every hydroponic grow — driving nutrient solution from your reservoir to your plants and back again with the consistency and reliability that your crop depends on. Alongside pumps, water chillers are an increasingly important piece of equipment for UK hydroponic growers dealing with summer heat, maintaining the 18–22°C reservoir temperature that maximises dissolved oxygen and prevents pathogen colonisation.
Submersible vs Inline Water Pumps
Submersible pumps sit inside the nutrient reservoir, directly pumping solution upward through irrigation lines. They are simple to install, self-priming and generally quiet in operation. Choose a pump with a flow rate (L/hour) appropriate to the number of drippers, channels or sites you are feeding — undersized pumps starve remote plant sites of solution while oversized pumps create excessive pressure and turbulence. Most drip irrigation systems operate effectively with 300–1000 L/hour depending on the number of drip points.
Inline pumps are installed outside the reservoir in the irrigation line — useful when the reservoir is positioned in an awkward location or when the pump heat contribution to solution temperature is a concern. Inline pumps generally run cooler relative to the solution, making them preferable in warm growing environments.
Water Chillers for Temperature Control
Dissolved oxygen levels in water decrease sharply as temperature rises — a solution at 25°C holds less than half the dissolved oxygen of one at 15°C. For DWC, NFT and recirculating systems, maintaining reservoir temperature at 18–22°C is essential to prevent root zone oxygen starvation and the Pythium root rot that rapidly follows. A water chiller maintains this temperature reliably through summer heat waves and warm growing environments.
We have been supplying water pumps and chillers to UK growers since 2017. Browse the full range below.