Hi there, thank you for your feedback on our Never Dig HYDRANT SLEEVE for Frost-Proof Yard Hydrant. We appreciate your suggestion about the end being male for easier removal and reattachment.
Another way to think about it, a female end in the sleeve would require a nipple for every hydrant, since most hydrants come with a female coupling. This would pose a serious problem should you have any issue with the loose nipple in the bottom of a deep hydrant.
Thank you for your support and happy plumbing!