Kung Fu Maintenance shows how to use the nice feature some swimming pool and spa filter pressure dials have that show you when it is a time to backwash or clean the filter. Also gives the prescription if your gauges do not have the feature. When your gauge shows a seven to ten pound pressure difference from when you first finished adding your filter media (D.E., Sand, Cartridge, etc) than it is time to backwash or clean the filters. Always follow individual manufacturer specs.
Backwash Time Telling
These pressure gauges are pretty nice. You can see you can adjust your start and it can show you when it is time to clean the filter so after you clean your filter and than you add your D.E. or your sand depending on what kind you are using you can adjust this here to line up with your dial so that you will know when it is time to clean your filter.
So like I lined mine up at ten pounds. When it reaches twenty pounds there than it is time to clean the filters. So a pretty nice feature.
If your gauges do not have this feature you will need to record your start pressure s and backwash or clean the filter when the pressures have increased by seven to ten pounds.