Plumbing... Need help

[golf nut]

Originally Posted by shrimpchips

Unless it calls for 1" pipe, you should probably leave it at 1/2" - if you take it up to 1", then your headloss is going to be even greater as there's much more water that the pump has to push up against, so you will get less flow.

Actually this isn't true even if you increased to 3' Diameter pipe you would still have the same flow believe it or not it is fact.