Help Request - What kind of valve is this and how do I remove it? The left valve leaks only when connected to the sink and the sink is off (pressure builds up).. currently the hose is going to a bucket that constantly drips. Any suggestions would be appreciated!

​Edit: I ended up having to cut the pipe to get them off. They were glued to the pipe, and did not have a “shark bite” end to itLeft valve leaks, right looks like it has leaked. Would like to replace both via /r/DIY http://bit.ly/2G3013H