3/4″ and 1″ straight thread Johnson type nozzles


1″ and 3/4″ straight thread nozzle with hex nuts

Manufactured in stainless steel 316, for 10 GPM, to be placed on perforated plates in false bottom.

Product images are demonstrative and may vary from the physical product.


Johnson type nozzles 3/4″ and 1″ straight thread, in stainless steel 316

Micro-slotted Jonshon type nozzles are used for the retention of granular media in water treatment equipment. These media can be of any type, such as: activated carbon, silica sand, ion exchange resins, green sand, MTM, Birm, pyrolusite, among others.

In addition to the retention function, the micro-slotted nozzles provide good drainage and adequate flow distribution, both in equipment working under pressure and in those working by gravity.

The micro-slit through which the fluid flows has a “V” shaped cut, with the most closed part towards the outside of the nozzle. This design prevents clogging.

The microslot is continuous and has a total flow area of approximately twice the cross-sectional area of the connection nipple. This means that the microslot does not constitute a restriction to flow and, therefore, causes minimal pressure drop.

These nozzles are fixed by means of the two nuts that must remain between the perforated plate (without thread) of the false bottom.

The 0.18 mm opening in the most closed part, which is in contact with the granular medium, allows any granules larger than 30 mesh to be retained directly. This means that no gravel beds are required for support.


Characteristics of Johnson type nozzles:

Brand: Carbotecnia

Made of 316 polished stainless steel

Microslot opening of the external part: 0.18 mm

Acid-resistant rubber grip.

Hexagonal nuts for fastening.

Suggested maximum service flow: 4 – 6 GPM

Suggested maximum backwash flow: 18 GPM

Pressure collapse: 300 PSI (2070 kPa)

Burst pressure: 200 PSI (1380 kPa)

Measurements of the straight nozzle for false bottom:

Diameter: 50 mm

Length of the Johnson micro-slotted element: 13.5 cm

Total length: 6 cm

Pipe diameter: 1″

Learn more nozzles here:

What is a Nozzle and how does it work?

Selection of a distributor or nozzle for a deep bed filter