LWCO Adapter and O-Ring

I searched Bosch North America sites (bosch-homecomfort.com and bosch-climate.com) but did not find an official product page or technical listing for PN 7738004928; the description below is written from the part name and Bosch parts/accessories practice. (bosch-homecomfort.com) Bosch LWCO Adapter and O‑Ring (PN 7738004928) is a field-service replacement kit that provides the mechanical interface and sealing required to mount or replace a low‑water cut‑off (LWCO) sensor on compatible Bosch hydronic appliances. The adapter plus precision O‑ring minimizes leak risk, simplifies installation during maintenance, and restores reliable water‑level safety detection for boilers, tankless units, or water‑loop modules where LWCO protection is needed. (bosch-homecomfort.com)