of water entering manifold 10 in this instance may cause poppet valve assembly 36 to open hence creating a second flow path to outlet 18 repositioning of gate 42 may be caused by any appropriate device preferably gate 42 is actuated by a solenoid configured to turn axle 46 which is connected to the gate 42 rotation of axle 46 in turn causes gate 42 to pivot between at least its first and second positions persons skilled in the art will recognize that gate 42 may move in other manners or actuated by other devices instead though gate 42 beneficially may have a solid face 50 sized and shaped to prevent passage of water when in the closed position i e the area of face 50 is approximately the same as a cross sectional area of at least some portion of chamber 38 fig3 4 depict an alternate gate 42 a in which otherwise solid face 50 a includes an opening 54 placed behind opening 54 may be poppet valve assembly 58 including disc 62 stem 66 and coil spring 70 spring 70 biases disc 62 so as normally to close opening 54 thus normally causing face 50 a to obstruct flowing fluid it encounters should water flow through inlet 14 or 22 exert against face 50 a a force exceeding a predetermined amount however it will overcome force of spring 70 and push disc 62 away from opening 54 this action produces a bypass path into and through chamber 38 to outlet 18 and serves to regulate flow rate into the.