An Environment Agency spokesman said: "While the Agency maintains the Prestatyn Gutter we do not maintain the
flap valves.
Leg veins contain
flap valves designed to direct the flow of blood in an upward direction on its return to the heart.
While the fan shroud took the grand award, other plastic uses honored by the SPE include the grille opening reinforcement on the Ford Focus; the active intake manifold with plastic
flap valves on the Rover 75; the soft TPO skin instrument panel for the Pontiac Bonneville; the lower radiator seal made from recycled fires on the Jeep Grand Cherokee; the plastic body panels on the Smart car, and molded-in-color fascias on the DaimlerChrysler Neon.
of 1 1/2", both fitted with perforated caps and rubber
flap valves (made from an inner tube) on the bottom end.
Pumps features no seals to leak, no check valves or
flap valves to clog, dry running capability, and self-priming suction lift to 26 ft.
Flap Valves. These are essentially check valves at the output of a pipe or wall opening to prevent entrance of backwater from the outside.