79 of body member 12 valve portion 58 has moved toward the attachment 18 and seal 66 no longer engages collar 62 in this position water can flow between the two component parts as there are grooves 63 placed in the collar 62 to allow such flow into bore 13 this is a low flow condition in this position the quad o ring 60 serves as a flow control element in that with increased pressure and flow of water the ring will expand and partially fill the grooves 63 this maintains a consistent flow rate despite variations in the pressure of the inlet water supply water can then pass through passages 33 and into passage 26 a of eductor part 26 in order to initiate a high flow condition the trigger 40 is moved further toward body member 12 this is shown in fig6 in this position not only has seal 66 moved away from collar 62 but collar 62 also has moved away from valve seat portion 65 in this position water cannot only flow from between head portion 58 and the grooves 63 in the collar 62 but also between the collar 62 and the valve seat portion 65 it should be pointed out that in this high flow position trigger 40 can now become engaged with latch 46 if desired so that it can be held in the high flow condition referring again to fig8 the contact member 29 of eductor part 24 will now engage the grooves such.