Watch this video to learn how to work with PEX piping.
1 Use PEX to run main cold-water feed into house.
2 Connect cold-water feed to manifold.
3 Run separate cold-water lines out from manifold to various fixtures.
4 Run PEX hot-water feed from water heater to manifold.
5 Run separate hot-water lines out from manifold to various fixtures.
6 Use flaring tool to attach fitting onto end of PEX piping.
7 Thread PEX fitting onto manifold and tighten with preset torque wrench.