The~Doofie~Man© wrote:
Is the 2" the size coming off the pump?
I would use the size from the pump, then reduce in size if you feel its too
much.
You can't go 1 1/4" to 2" it won't work properly.


my pumps discharge is 1in
manufacture recomends 1 1/2 in piping for max flow, as mine are on long
pipe runs I go 2 inch from pump to oulet in filters or fall
going larger has no affect on the pump but going smaller can cause pumps
to fail earlier than theuy should

John Rutz