We string together a lot of pipe just to show that the pressure eventually finds the spout. expand 
http://plumbin.ward.wiki.org/assets/pages/plumbin-in-wiki/mosaic.html?1.202020./044444440/524444442/.0202023./........./........./........./......... HEIGHT 320
The drop appears when pressure reaches 10.
The hover readout updates with each computation showing the change at the spout.
See Super Slow Pipe. expand