Pump Calculation

[RBCC]

I have a water garden that 4 waterfalls made of 1/2" PVC. The pond is 100" X 39"X26". I have 4 waterfalls made of the same 1/2" Pvc. I have 4 waterfall pushing water through 1/2" PVC that are 28" from lead 1/2 Pvc T. We are using a shower head for a fountain (which I would like it to go up in the air 5"). And statuette of a frog spitting water. How much gph would be suffiecent for this feature? Please show how you came up with it! John

[Pilot Dane]

I do not understand what you mean by four waterfalls and then you mention using a showerhead as a fountain.

If you are creating waterfalls are you running a separate 1/2" pipe to each? Or, are you running your 1/2" pipe to only the top one and then the water falls through the other waterfalls? It is important to know how high the upper waterfall is above your pond level and also how many 90 & 45 degree bends you have in the plumbing since they add to the resistance in the plumbing.