Submersible Water Pumps
R 130.00 – R 545.00
Submersible Water Pumps are used to circulate nutrient-rich water in NFT and other hydroponic systems.
Choosing the right water pump will be determined by how high the pump would need to lift the water. ( In the table below the listed Head Height is the height where the pump basically stops pumping any water. ) The prescribed flow rate for NFT hydroponics per channel is between 1 and 2 liters of water per minute. Choosing a pump slightly larger than the one that meets your minimum requirements is advised, as the flow rate can then be throttled back slightly by using an inline tap.
|Model||Output||Head||Pipe Fitting Size|
|Grech HJ-542||400 L/h||0.8m||12mm|
|Grech HJ-742||600 L/h||1m||12mm|
|Grech HJ-942||800 L/h||1.3m||12mm|
|Grech HJ-1542||1400L/h||2.0m||20mm (Needs hose clamp)|
|Grech HJ-1842||1800 L/h||2.5m||20mm (Needs hose clamp)|
Submersible water pumps are just electromagnets. The coil is in the main body, and the impeller shaft has a magnet. Water can get in-between the impeller shaft and main body, and it acts like a lubricant. There are just a few basic parts, the main body, the impeller and shaft, the flow restrictor, impeller cover, and inlet opening cover. It can be taken all apart and cleaned. You should get used cleaning the pump regularly. It’s easy to do especially when you do it regularly. Just take it apart and use regular dish soap and a sponge or brush.
The Grech pumps come with a filter sponge and need to be cleaned regularly. All you need to do is put a dab of soap on it and work it in under running water, then rinse it out thoroughly.