If you need to close a loop of tubing either temporarily or permanently, you can use a PEX Plug. HydroPEX Brass Plugs can be installed and used with either the Watts Crimping Tool or the HydroPEX Clamping Tool.
PEX Fittings and PEX Tools can be found at www.supplyhouse.com
PEX Fittings and PEX Tools can be found at www.supplyhouse.com