So I removed the aux water pump and monovalve TOGETHER. I removed the 4 screws to the heat shield in the center and then the shield for better access. Then, I disconnected 2 hoses from the monovalve at the firewall, Hose from the aux pump back to the engine pump (at the aux pump) and the little hose from the monovalve to the windshield surface heater (some of you won't have this). Disconnect plugs to both units, remove 4 screws (2 holding each unit) and lift out. It's a little tight, but it goes,
really, it's not too bad!