1 inch compression ball valve for water heater inlet. Advisable and up to code?

[Pman6]

My water heater leaking inlet gate valve is soldered to 1 inch pipe on both ends.

Can I remove it and just install this compression ball valve....
https://www.amazon.com/Everflow-Supplies-600M001-NL-Compression-1-Inch/dp/B00MA9DNXK


This is my current failed joint...

 

[Jeff H Young]

Sure you can! thats just fine . Dont put teflon tape on your compression valve or the male adapter at the flex conection (as in your pic) it dosent help in that application