Based on this product's specifications, here are some alternatives and similar models
Brass reducing tee TECE 32 x 25 x 32 mm model 760523
Summary description:
Brass reducing tee TECE 32 x 25 x 32 mm (760523) is a plumbing fitting designed to branch a 32 mm pipe with a 25 mm reduced outlet. Manufactured in brass for corrosion resistance and mechanical strength, it is intended for water distribution and heating systems where pipe size transition and branching are required. Suitable for use with compatible piping and standard connection methods.