Plumbing question

[Reefer Rob]

[quote=Myka;400466]A person will get less gph, but more psi at the end of a 1" pipe than using the same pump on a 3" pipe.
QUOTE]

Put a pressure gauge at the end of each pipe and it will be the same.

[sphelps]

Originally Posted by Myka

I didn't say more pressure increases flow! Where do you see that?

Well you started off your post by saying you agreed with the fact that larger diameter pipe means more water weight and therefore less flow. Your next statement seemed to be your argument on why you agreed. Sorry for the confusion but I'm not a mind reader

Originally Posted by oilfieldsafety

but by going to a larger diameter pipe won't you increase your head pressure due to weight of the water column and in fact decrease your flow?

[hillegom]

If we take a 5" pipe and adapt it to a 3/4 opening in the pump, the weight of the water in the pump is only the area of the 3/4" opening times the weight of water. The rest of the weight, 4.5" will exert force on the adapter.
As sphelps says, use the calculater in the link above, as the pipe dia. increases, head pressure goes down.