Did you use pliers or adjustable wrench to shut it off?

Are you going to switch out the blue handle?

Looks like you need to buy a full replacement part if you can’t find just the handle with O-Ring and cap.

Your valve looks like the one below:

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2. Water well repair part 3, Bonus: how to repair a pvc ball valve [23:40 | NOV 12 22 | Scott Flory] https://youtu.be/Bnt4nPPfmmY

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