AquaPure AP431 Hot Water System Cartridge
Can't tell if the cartridge is doing all it claims. But that's the point, I put this in so I do not have issues with my tankless water heater. Changing them in and out is quick, as long as you think ahead and put in some shutoff valves on either side. There is no extra chemical smell or taste to the hot water after installation.
December 3, 2010
It was very easy to change out and does an excellent job of keeping my tankless waterheater scale free.
July 13, 2009