Re: PEX.....trying to decide how to run
Method 1 requires fewer fittings but more pipe. Nearly all your pipe can be 1/2", which is somewhat cheaper than larger sizes. You can also put a shutoff valve on each line at the manifold, to shut off the water to each individual fixture. The cost of the additional pipe will likely outweigh the savings on fittings. You will also find that hot water will reach the farthest fixtures more quickly, as there will not be as great a volume of cold water in the lines to be removed.
Method 2 requires less pipe but more fittings. If you were paying a plumber to install it, the cost savings on pipe might not balance out the labor costs to install the additional fittings.
The "Senior Member" designation under my name doesn't mean I know a lot, it just means I talk a lot.I've been a DIYer since I was 12 (thanks, Dad!). I have read several books on various home improvement topics. I do not have any current code books I can refer to. I was an apprentice plumber for two years.