Netafim Netbow Watering Ring

Netbow circular dripper ring - pimp up your watering system with this easy add-on that ensures even watering through your media.

If you just want to CNLs (the little emitters on the ends, you can get them here.

This 12 cm dripper ring comes with an optional metre of white of dripper line and a 2lph CNL - the CNL is a Compensating non-leakage nozzle which acts as a gateway between the dripper and the delivery line to ensure precise and equal amounts of water are delivered over.

The operating pressure is between 0.5 to 4 bar.

Water Pressure with Pressure Compensating Emitters

Theoretically between the stated operating pressure range of an emitter, the volume of water coming out should be the same. The diaphragm inside the emitter opens when a pressure is reached and allows water to pass.

However, in pratical terms even within the specified operating pressure range, the volume of water output from a Pressure-Compensating Drip Irrigation (PCJ) system can vary due to factors like emitter design, small pressure fluctuations, and maintenance conditions. Additionally, if emitters are clogged or not maintained properly, they may not provide the intended flow rate, leading to uneven watering.

Key Point on Clogging: Clogging is a common issue in drip irrigation systems, where debris or mineral deposits build up in emitters. This blockage restricts water flow, causing some plants to receive less water than they need, which can stress them or lead to uneven growth. However a partially clogged dripper may still work at higher pressure but restrict flow at lower pressure. ie the higher pressure will blast through the partial clog drippers. 

To prevent clogging, it's crucial to regularly clean the emitters and use water filtration systems such as the Profec filter to ensure your irrigation system runs efficiently and your plants remain healthy. You can alsoo use something like House and Garden Drip Clean, with your nutrients. 

Suggested High Pressure Pumps

The most common operating range is 20-40 psi / 1.4-2.8 bar . You MAY be able to get away with less pressure especially in a small setup 4 plants in a 1m tent where the reservoir is very close (and the pipework is not doing up down left right and loop-da-loops). To summarise some options for you

• • Aquaking 7000LPH - 0.8 bar (not optimum but for the cost you may be able to get away with it in a small setup)
  • Aquaking 800103 - 3 bar
  • Clarke PSD1a Pump - 3 bar
  • DAB Pump - whatever you want but must be used in conjunction with solenoid valve and a controller like the Grow Link System 

For the Aquaking and Clarke pump, you will need Aqua King to Floraflex coupling to join on to Floraflex tubing or similar LDPE material pipe work. In which case you  may also need a Floraflex hole puncher This will make light work of punching holes in. If there was ever a tool that you will be thankful for, its this bad boy

Also consider getting this Digital Time-r for your pump to set your feed schedules. This one goes down to the second and is way way way (!!) easier to setup. Please believe.

Considerations For Netbow Drippers

If you have a large system with 10+ / pots that are far apart, then we suggest you use the included 2LPH CNL (punch holes in your drop line and stab these things into it!).

 This means water will only come out of the drippers once a certain amount of pressure has built up in the system - this ensures even watering across the entire system...otherwise, the ones closest to the pump will be fed first and the one at the back will get the least watering!

If you have fewer pots and the pots are close together (ie the travel from the pump to your plants is minimal), then you can just attach these rings to normal dripper manifolds. These rings will fit perfectly onto existing Wilma (aka Origin) systems. With this method:

• you don't need a strong ass pump (as you're not using the CNLs), but your watering may not be as even...hence its important that you're not trying to blast the water through miles of pipework, otherwise the one at the end won't get fed as much.
• You'll also need to install an anti-siphon (use a tee piece to connect it), check out the diagram on the top spin drippers product page for more info.
• Incidentally, if you wanted and have them already, you can replace the drippers on the top spins with these net bows.