Abstract: A spray nozzle system including a modular nozzle assembly comprising a liquid inlet unit having at least one tail pipe for connection of a flexible hose and a clamp enabling the liquid inlet unit to be clamped to a dry spray bar at a freely selected position therealong, an alternative liquid inlet unit having a liquid inlet pipe and a clamp enabling the unit to be clamped to a wet spray bar with the inlet pipe sealingly engaging an aperture in the bar, a check valve unit and a spray nozzle unit, either of the valve unit and the nozzle unit being connectible to either one of the two inlet units and the spray unit being connectible to the check valve unit.