Based on this product's specifications, here are some alternatives and similar models
Wavin Vacuum Valve 32–50 mm
Summary description:
The Wavin vacuum valve, designed for pipe diameters of 32–50 mm, is a specialized plumbing component used to prevent vacuum formation in drainage systems. It ensures efficient airflow, helps maintain proper pressure levels, and prevents the siphoning of water traps. This durable valve is essential for reliable wastewater management in residential and commercial plumbing installations.