Copper pipe adapters get sweat onto copper pipe, whereas copper fitting adapters get sweat onto a copper fitting (which is usually connected to the copper pipe). If you want to take PEX straight to a copper pipe with no copper elbow, copper coupling or other copper fitting in between, you will need a PEX Copper Pipe Adapter. Be sure to use the PEX fitting that works with your PEX tool.
Copper pipe, PEX fittings and PEX adapters can be found at www.supplyhouse.com
