Interesting concept. Do they supplement a sump pump or replace it? Thank you for sharing.
https://www.watercommander.com/articles/water-powered-backup-sump-pump-ultimate-guide
city water driven sump pumps are intended as a backup. Utilized your electric sump pump with the above or similar model as a backup for when power is lost. If a situation occurs where city water pressure is loss, then your area has problems where standing water in your basement is minor in comparison.