Step 7: Creating the trigger
The trigger is a bulldog clip which will pinch the pipe and stop water flow; this has to be a fairly strong clip.
Push short length of copper pipe in to the hole on one of the handles of the clip and hot glue it in place on both sides.
On the copper pipe side of the clip cut the wings of the clip down as we don’t need them too long.
On the other side bend the wings up as we will be using these to secure the trigger to the body of the pump.
Now you need 2 cable ties one for the front edge one on the back thumb/finger lever, put these round the body and hot glue the whole lot in place.
Now loop the 5mm clear hose from the pressure chamber round the pump near the trigger and hot glue in place.
now take your soft pipe and clip it so its split then push it over the clear pipe and using a mini cable tie secure it in place and hot glue it so its water tight.
Feed the soft tube through the bulldog clip above the spring and through the front of the clip.