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