Based on this product's specifications, here are some alternatives and similar models
Compression union Comap 3/4E-15z with flexible ring, nickel-plated (MPN 835915)
Summary description:
Comap compression union 3/4E-15z (MPN 835915) is a nickel-plated pipe fitting with a flexible sealing ring designed for reliable sealed connections in plumbing and heating systems. The union provides mechanical joining of compatible 3/4-inch pipes or fittings, ensuring leak-resistant joints where disassembly or maintenance may be required.