Based on this product's specifications, here are some alternatives and similar models
Siphon for Washing Machine McAlpine 5505 — 6/4" x 40mm Drain Connection
Summary description:
McAlpine 5505 is a washing machine siphon with a 6/4" x 40mm drain connection designed to connect appliance waste water to household drainage. The unit provides a compact trap and connection point for washing machine discharge hoses, ensuring proper drainage and preventing sewer gas entry. Suitable for domestic installations where a 6/4" x 40mm interface is required.