Thanks. The UltraPure was installed by the builder (Robertson Pools in Dallas, Texas) as part of the equipment "package". Our UltraPure is Model Number UPP25 -- two lamps. Ours has only a single power supply for both lamps, but now they are designed with two power supplies -- one for each lamp. I have two new lamps, and the power-supply kit (contains two power-supplies). Here is the issue. I have discussed my UltraPure and its installation with Brian at UltraPure. Brian seems unwilling to provide current design diagrams, and that is what I want. Since my UltraPure came with only one power supply, I am adding another and need a design diagram for the parts layout. On top of all this, Brian indicated that (based on my description) our unit is mounted upside-down. Our lamps are in the larger top section, and the power supply is in the smaller bottom section. I am an engineer, and fully capable of both electrical and physical rebuild -- but need a service manual to know the physical and electrical design layout. I cannot speak to the usefulness of the UltraPure, but we never shock our pool. Something -- chlorine or ozone -- is oxidizing out the chloramines and other organics.