Check for uniform discharge from the nozzle. All hoses and fittings should be of sufficient quality and strength to handle liquids under maximum pressure. Select hoses and lines according to composition, construction and size. Hoses should be flexible, durable and resistant to sunlight, oil, chemicals, and general abuse such as twisting and vibration. The outer hose coatings should be chemically resistant because they may contact the spray solutions.
Sunlight resistance increases durability.
Suction hoses should be airtight, noncollapsible, as short as possible, and as large as the intake port. When spray pressure cannot be maintained, check the suction line for restrictions. Lines between the pressure gauge and nozzles should be as direct as possible with minimum fittings, throttle valves and restrictions. Sufficient flow velocity is required so suspended particles will not settle in the lines. If lines are too small, pressure will drop and the nozzle flow rate will be insufficient.