Filter module with improved backwash capability

A filter module comprising:

• a first flow pipe,
• a second flow pipe in communication with a joint,
• a water influent means in communication with said second flow pipe,
• a water effluent means in communication with said first flow pipe,
• a filtering medium,
• a filter tank,
• a check valve, and
• a backwash jet assembly connected to said first flow pipe including a plurality of backwash jets;
• the module being constructed and arranged,
• during a filtering mode, water flows into said filter tank through said second flow pipe and is dispersed into said filter tank through said water influent means, the water then passing through said filtering medium contained in said filter tank, the water then being drawn into said water effluent means and then out of said filter tank through said first flow pipe, a direction of water flow being ensured by said check valve;
• and wherein
• during a backwashing mode, the direction of water flow is reversed so that water flows into said filter tank through said first flow pipe, then into said backwash jet assembly, the water exiting said backwash jet assembly at increased velocity through said plurality of backwash jets, the water then impinging on accumulated particles of said filtering medium, thereby breaking the particles apart so that waste material is removed from said particles of said filtering medium, waste water containing the waste material then being drawn into a lower end of said first flow pipe, said check valve causing said waste water to flow through said joint into said second flow pipe, the waste water then flowing out of said filter tank through said second flow pipe and being eliminated from said filter tank.