What would happen if you had a small siphonic tube start delivering water to the pvc pipe just before the downstream manometer and the siphonic inlet's height at the top of the small tube was higher than the upstream manometer? I notice that you have not answered any previous questions but I hope that you answer mine. Thanks.
what if i distort the straight pipe and say pt.1 at same pressure and pt.2 at much lower pressure what will happen to the flow(gpm) will it increase or decrease?