With this type of nozzle, a crystalline effect is achieved in the water, making it move inside the nozzle in a laminar regime. To avoid turbulence, all the nozzles of this group are provided with short jets that “calm down” the water regime. The goal is to get a clear stream of water, which means that it does not have air inside it. The most representative jet of this nozzle is the crystal jet.
These nozzles are among the most common and best known in ornamental fountain designs.