Replace CM13 recovery with CWM6 I am using Sony Xperia SP codename Huashan with Android 6.0.1 running cyanogenmod 13. When I flashed the custom ROM for CM13 it replaced the CWM recovery with its own CM13 recovery. How do I regain CWM recovery on my device. Will installing the CWM Recovery in fastboot mode break my CM13.

I followed the below link

http://techbeasts.com/install-cwm-6-recovery-on-xperia-sp-running-12-1-a-0-266-firmware-how-to-guide/

for installing CWM but the author says that it is only for stock ROM and now I am on custom ROM CM13. Will this procedure still work?
Will installing the CWM Recovery in fastboot mode break my CM13?


No, why would it? But before flashing your custom recovery make sure to disable the setting Update Cyanogen recovery or Update CM recovery or a similar setting under developer-options. Afterwards, flash your custom recovery the way you want. If that doesn't work, flash a custom kernel followed by your custom recovery. 

A custom recovery is not limited to a particular ROM so it doesn't matter whether you're using stock ROM or not.