Could she be talking about a master batch of lye. I make a master batch of lye in a 1:1 ratio and then just add the missing water when I make a batch of soap. That's the only thing I would do with that ratio.
The pvc should match your batch size and the size of the soap that you want. Some people cut the pvc in half and then use something to hold it together while your soap hardens. If you don't get a smooth or even cut when you split the pvc in half you can use parchment or freezer paper to line the...