Based on this product's specifications, here are some alternatives and similar models
Compression Coupling WAVIN TIGRIS K1 20 mm (1/2") PN10 PPSU 3241036529
Summary description:
WAVIN TIGRIS K1 compression coupling for 20 mm (1/2") pipes, model 3241036529, made of PPSU and rated PN10. Designed to join plastic plumbing or heating pipes with a push-fit/compression connection, it provides a pressure-rated sealed joint suitable for potable water and heating systems. Typical use cases include residential plumbing repairs, pipe extensions, and professional installations requiring a compact, pressure-rated connector.