a flap rotatably provided inside the hollow space of the valve housing, said flap having a first portion disposed adjacent to the inlet pipe and a second portion disposed adjacent to the supply line, said flap further having an axle extending through {HEAD ~ a front side} of the valve housing, said second portion of the flap having a distal end which forms {TAIL ~ a clearance} with an inner wall surface of the valve housing inside the hollow space 
a flap rotatably provided inside the hollow space of the valve housing , said flap having a first portion disposed adjacent to the inlet pipe and a second portion disposed adjacent to the supply line , said flap further having an axle extending through { HEAD ~ a front side } of the valve housing , said second portion of the flap having a distal end which forms { TAIL ~ a clearance } with an inner wall surface of the valve housing inside the hollow space
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