System return adapter 1-1/2" 38mm

System return adapter 1-1/2" (38 mm), Part No. 7738004958, is a field-service adapter for connecting 1-1/2 in (38 mm) return piping to Bosch hydronic equipment. Its size-matched design provides a direct return connection for retrofit and replacement work, simplifying installation and reducing the need for extra fittings. Search note: No official Bosch product page or datasheet for part 7738004958 was found on Bosch North America sites; this description is based solely on the part name and category. (bosch-homecomfort.com)