Netafim VibroNet Sprinkler, Blue Nozzle with Check Valve - 25 Pack

VibroNet Blue Nozzle with Check Valve for Seed Germination Benches This bag holds 25 of Netafim's VibroNet model 040 heads, each fitted with a blue flow chamber and an anti-drain check valve on the inlet. It is a bridge-free micro-emitter built for germination tables, where a soft, even mist matters more than raw volume. Water passing the nozzle sets a small needle vibrating, and that vibration breaks the jet into fine, uniform droplets. The same motion keeps mineral scale from settling in the orifice, which is why these heads rarely need picking clean. Netafim rates the blue nozzle at 40 L/h (10.6 GPH) at 3.0 bar, with a recommended working range of 3.0 to 4.0 bar. Its US design guide plans around a lower average line pressure of 32 psi, where the same nozzle delivers 9.2 GPH. Wetted diameter runs about 4.0 m (13 ft) with the head mounted 150 cm above the ground. The valve is Netafim's AD 20 anti-drain type. It keeps the lateral charged after shutdown, so short misting cycles switch on and off cleanly instead of dribbling out the low end. Filtration should be 120 mesh (130 micron) or finer, because the water passage through the nozzle is only 0.60 mm². Every part comes apart by hand for flushing. Hanging a Greenhouse Micro Sprinkler Line over Seed Trays The blue head is the light-mist option in the VibroNet range, so it belongs over sown plug trays and seed flats rather than finished pots. Netafim's guide spaces heads 3 to 5 feet apart along the line and hangs them 2 to 5 feet above the crop. One line down the centre of a narrow bench covers it, and wider ranges of benches take a line every 7 to 9 feet. The head runs upright on a riser or inverted from a hanging drop, which is the more common layout over propagation benches. That drop assembly, or the threaded adapter for rigid pipe, is a separate part and does not come in this bag. At this light flow, standard three-quarter-inch poly feeds a supply run of well over a hundred feet. Flush the mainline and every supply pipe before the check-valve heads go on. Construction grit washed into a new line is what plugs a fresh head or throws its pattern off. Blue is the gentler of the two VibroNet flows, so it puts down less water per cycle than the green nozzle. For heavier overhead watering of finished containers, the green VibroNet or a SpinNet head is the better match. Where rooting cuttings need saturated humidity rather than droplets, a fogger such as the CoolNet Pro handles that job better. Twenty-five heads outfit roughly 72 feet of line at the tightest spacing, which is one long germination bench or two short ones. Key Features Blue 40 L/h nozzle: A light, even mist sized for seed germination and plug trays. Vibrating needle: It breaks the stream into uniform droplets and shakes loose mineral scale. AD 20 anti-drain check valve: The line stays charged, so heads start and stop together without drip-down. Bridge-free head: No arm sits over the nozzle, so no drips land on the crop below. Upright or inverted: The head mounts on a riser or hangs from a drop assembly over the bench. Chemical-resistant plastic: It stands up to standard agrochemicals, nutrients and acid line treatments. Pack of 25 heads: Enough heads for one long propagation bench at close spacing. Technical Specifications Specification Value Brand / model Netafim VibroNet, model 040 Netafim catalogue number 64300-001080 (head + AD 20 valve, 25 per bag) Netafim USA code VN-BL (0354040L-B) Color code Blue regulation chamber, grey pin Nominal flow 40 L/h (10.6 GPH) at 3.0 bar Flow at 32 psi average 9.2 GPH (Netafim USA design guide) Recommended pressure 3.0 - 4.0 bar (43.5 - 58 psi) Wetted diameter 4.0 m (13 ft) at 150 cm above ground Nozzle water passage 0.60 mm² Check valve AD 20 anti-drain valve Filtration 120 mesh / 130 micron Inlet Press-fit, male Installation Upright or inverted Spacing / height 3 - 5 ft apart, 2 - 5 ft above the crop Hanging assembly or base Not included Pack quantity 25 heads