To replace an aging or failing diversion valve on nearly any automated Spectra system manufactured within the past 15-20 years, the preferred and recommended upgrade is to the Burkert valve. This versatile high-quality diversion valve works for both 12/24V control systems and the upgrade kit comes equipped with parts to retrofit to many installs as well as a new product manifold. Included in the design is a manual override button with a twist-lock button for hassle-free operation in manual operation mode without altering plumbing. See attached/below bulletin for details.