Calyx Fountain Nozzle - Brass ½" BSP(M) The Calyx Fountain Nozzle creates a clear, pulsating sheet of water in a mushroom shaped pattern. The water film produces very little splash and is ideal as a pond centrepiece. The upper brass cone section is fully adjustable to allow more or less water through the nozzle, increasing or decrasing the sheet thickness. We recommend using the a submersible pump of approx. 3000-5000lph discharge in conjunction with the Calyx Fountain Nozzle. The Calyx will screw directly to the top of the fountain riser stem and the water flow can be easily adjusted. 1/2" BSP Male Threaded Connection. Brass & Bronze construction. Max Display Height: 45cm. Maximum Spray Diameter: 30cm. The Calyx fountain display looks particularly attractive when illuminated via underwater lighting at night time.