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.
The Grech pumps come with 2 pipe fittings, the standard fitting (mentioned in the table above), used to connect to piping to lift/move water. The 2nd fitting ( with the little T-piece on the side, attached to clear piping ) is actually a venturi adaptor and can be used to aerate tanks of water, INSTEAD of lifting/moving water. This venturi really only works well on the larger models (HJ-942 and up) and is also dependent on how deep the pump is submerged. THIS video shows how a venturi can be used to aerate and agitate water.
The Grech pumps come with a filter sponge and needs to be cleaned regularly. All you need to do is put a dab of soap on it (optional) and work it in under running water, then rinse it out thoroughly.
Clamps are a simple solution for connecting ducting to Inline Fans, Carbon Filter, Ducting Splitters or Air Cooled Reflectors. Fitted with a worm screw, tighten with a screw driver in a few seconds. Clamps provide a secure connection, ensuring your extraction system remains securely connected.
The Clamps are made from strong, Stainless Steel They are super easy to install and will last you for many grows to come. To install a clamp, you simple screw it open wide enough to fit over the end of your ducting, slip your ducting over the Fan/Reflector/Carbon Filter’s flange and screw it closed to ensure your ducting is fastened on tightly.
Available in a few different sizes to suit all ducting sizes. They are an efficient, cost effective method of joining ventilation equipment.
Clamp Sizes:
14-32mm (for larger water pumps) 95-121mm
133-159mm 197-222mm
241-267mm
286-311mm
PLEASE NOTE: 14-32mm Clamps are Stainless Steel, for use under water.
Clamps are an adjustable steel band that the user tightens with a screw. Most people generally know this kind of fitting as a Jubilee Clip which is often in the plumbers tool box. The premise is the same just on a bigger scale to suit ducting, not water pipes. The worm gear that adjusts the tightness allows a secure connection between ducting and fan or filter.
Many growers use ducting clamps in combination with Aluminium tape. This makes an even stronger join with advantages of both. The tape has a bigger surface area for joining and can go round and round as many times as you want. It can degrade after a while though so the Ducting Clamp will increase holding power of the join.
Lumii 5m Kettle Plug Extension 0.75mm Core – Extend kettle plug connections with this 5m Link Lead, use with Lumii Bar LED Fixture, Electronic Ballasts, or RAM Inline Fans. Suitable for HID Reflectors and Hoods with Lamps of up to 600W / 7 Amp load. 3 Core Copper wire of 0.75mm.
