This fitting is recommended to adapt from metal Female thread to PEX tubing, copper tubing, or CPVC tubing on the cold water side of a hot and cold water supply system (previously uncopper).
No. 544051: 1/2", carded
No. 54405: 1/2", bulk
No. 544071: 3/4", carded
No. 54407: 3/4", bulk
View Genova Incs website for details and warranty information on this product.