Microjet Base – Orifice Nozzle Base Unit 0.8mm to 2.3mm (BB01–BB05)

The Microjet Base is the colour-coded orifice nozzle unit that mounts onto a riser or stake and accepts the Microjet Cap. The orifice size of the base determines the flow rate (litres per hour) of the sprinkler. Five orifice sizes are available, colour-coded for easy identification. The base screws onto a ½" BSP riser or fitting, and the spray cap clips on top.

• Application: Main body and orifice nozzle of a Microjet sprinkler
• Orifice sizes: 0.8mm (Black), 1.0mm (Blue), 1.3mm (Green), 1.5mm (Red), 2.3mm (White)
• Connection: ½" BSP male thread onto riser or fitting
• Compatible caps: Microjet Cap Black (AB01–AB09), Microjet Maxi Cap (AM01/AM05)
• Made by Microjet Irrigation Systems, South Africa

Key Features

• Colour-coded orifice sizes for quick visual identification in the field
• Larger orifice = higher flow rate and greater radius at the same pressure
• Screws onto a ½" BSP male riser, choke, or fitting
• Accepts all standard Microjet Caps and Maxi Caps
• Sold individually — combine with any Microjet Cap to complete the sprinkler

Orifice Size Reference

Typical Applications

• Microjet irrigation systems for orchards, gardens, and agricultural crops
• Under-canopy irrigation in orchards and vineyards
• Replacing a damaged or worn Microjet base
• Selecting an appropriate flow rate for a new irrigation zone

Technical Specifications

What's Included

• 1 x Microjet Base (selected orifice size)

Please note: Microjet Cap not included. Riser, stake, and fittings not included. For a complete assembled Microjet (base + cap), see the Assembled Microjets listing.

Installation & Compatibility Notes

Screw the base onto a ½" BSP male riser or choke and hand-tighten — do not overtighten. Clip the cap onto the top of the base. Select the orifice size based on your required flow rate and operating pressure. Contact Zisabo if you need help selecting the correct orifice size for your system.

Warranty & Support

Manufactured by Microjet Irrigation Systems, South Africa. Contact Zisabo for orifice selection guidance.

Related products: Microjet Cap Black (AB01–AB09), Microjet Maxi Cap, Microjet Choke, Rigid Risers, Standard Stake, Assembled Microjets