Putting together a network of pipes of different diameters and materials can be ... PVC and CPVC, PEX, ABS, galvanized steel and cast iron — can mostly all be connected to each other with ...

Note: Our home has a galvanized piping system ... Three-quarter inch (minimum) inside diameter supply pipes to each sill cock. Some local codes only require 1/2-in. pipe and a 1/2-in.