This longtime customer in Asheville owns an apartment complex with our filtration system for his residents. The older valves on the iron filters were no longer working correctly. So instead of repairing the old valves, they decided to replace them with new mechanical valves that have more functionality. These valves also have an extended battery backup and an excellent warranty. No old dial face technology! Have a question about water filtration? Call us @ 828-683-5400 or email us here