This is the replacement DI filter for your EZ Pure Caddy and EZ Pure Dolly.
If you're using this to clean windows, this filter should be replaced when your TDS from this filter rises above 010 on your TDS meter.
If you're using this to clean solar...
This is the replacement carbon filter for your EZ Pure Caddy and EZ Pure Dolly system.
This filter should be replaced every 6 months regardless of usage.
This is the replacement Reverse Osmosis membrane for your EZ Pure Caddy and/or EZ Pure Dolly System.
This filter should be replaced if it is not removing more than 80% of the incoming TDS from the water supply.
For example, if your incoming TDS is 100...