Just an FYI for anyone in the same situation. Took the valve off the filter and the two adapters appeared to be screwed into the valve body, but were either glued or stuck. So we sawed them off and attached them to the new valve body using threaded adapters and a Fernco 1.5x1.5" rubber coupling. Everything is back up and running with all new plumbing. Other that the pump needing a new O-ring, all is dry.