<SiFuh>
All that will need to be changed to 1 1/4" piping for the new pump
<SiFuh>
Everything else not in that picture can stay 1" without damage to the pump or the pipes and fixtures in the house
<SiFuh>
I am going to install an upgraded pump from my old broken 1" to 1" 0.5 HP booster pump located in the ceiling/roof void where the water tank is, to a brand new 1 and a 1/4" to 1" 1.5 HP booster pump.
<SiFuh>
So my tank needs to be drained. An all those pipes changed to an increased diamter