Drain jetters; Hydraulic valve actuators; Pumps as parts of machines, motors and engines; Pumps for counter-current swimming; Regulators being parts of machines; Taps being parts of machines, engines or motors; Valves as machine components; Angle valves being parts of machines; Back pressure valves as parts of machines; Ball valves being parts of machines; Beer pumps; Butterfly valves being parts of machines; Hydraulic valves being parts of machines