Based on this product's specifications, here are some alternatives and similar models
Expansion Vessel Quick Connector Afriso ASK with Inspection Valve, 2x 3/4" G (MPN 77924)
Summary description:
Afriso ASK quick connector for expansion vessels (MPN 77924) is a plumbing fitting with two 3/4" G threaded connections and an integrated inspection (service) valve. It is designed to attach and detach expansion vessels safely and enable access for maintenance or isolation. Suitable for heating and hot water systems where secure, serviceable vessel connection is required.