Water piping revisited:
Regardless of the material your existing water piping is made of simply ask at your local plumbers merchant shop the best way to connect their crimped poly pipe water system to the material you have but more on different applications shortly.
You will also need to buy test plugs to cap off all of the new wingbacks you are about to install. And make a written note of how many yards or meters of water piping you will need. It comes in straight lengths or a coil.
Also make a mental note of which pipes are your hot pipes and which are your cold. Usually all are in equal pairs hot on the left or on the right side as you look at the wingbacks. Also you are going to need some 4-inch X 2-inch (100 mm X 50 mm) timber and 3 inch (75 mm) nails to place behind the new positions of your wingbacks.
And you will need at least one sharp 1-inch (25 mm) wood drill bit. For all the holes to place water pipe inside wall timbers.
Now that your old plumbing fixtures have been removed. Open up the wall between the two timber uprights (studs) directly behind where the new plumbing fixtures will be such as the tap end of the new bath, or the new shower mixer, vanity basin or toilet position.