Based on this product's specifications, here are some alternatives and similar models
Reducer Tee Unidelta PE female thread 40 mm x 1" x 40 mm, model 603639
Summary description:
Unidelta reducer tee in PE designed for joining polyethylene pipes with a central female 1" threaded branch. Connects 40 mm PE pipe to a 1" threaded fitting and back to 40 mm PE; suitable for water distribution, irrigation and low-pressure fluid systems. Provides a compact, corrosion-resistant junction for pipeline branching and size transition.