Thanks valveman, but I don't think I explained my situation well (no pun intended). For irrigation I've always used a small, pre-charged tank connected to the pump. I don't think the idea of the small tank is to store water, but to add some needed pressure until the pump catches up. In the past my pump has never cycled, instead it comes on when water is needed, and runs until you turn the water off. Here's a photo of the setup I used at our old house. My question is whether it makes a difference if the outlet on my pump is 1" but then I bushing it down to 3/4" connect it to the 3/4" precharged tank, then go back to a 1" main line run to the sprinklers. Basically I want to use every drop of water that pump can put out, that way I can run more sprinklers at the same time. So by going down to 3/4 to accommodate the pre-charged tank, aren't I shooting myself in the foot so to speak???