Based on this product's specifications, here are some alternatives and similar models
Manifold / Distributor Comap Belka 11 outlets, supply 1" — return 1/2"
Summary description:
Comap Belka hydraulic manifold with 11 outlets, designed for connecting multiple heating circuits. The unit features a 1-inch supply connection and 1/2-inch return connections (as specified), providing organized distribution and return of heating medium. Suitable for underfloor heating or multi-zone radiator systems where multiple branch lines are required; enables centralized flow control and simplified piping layout.