Based on this product's specifications, here are some alternatives and similar models
Comap reducing press-fit tee 26x3–26x3–20x2 for DWZ piping
Summary description:
Press-fit reducing tee by Comap for DWZ systems, with branch dimensions 26x3–26x3–20x2. Designed for creating a reduced branch from a straight run in metal piping using press-fit installation. Suitable for plumbing and heating installations where reliable, solder-free joints and compact pipe transitions are required.