Filter Flushing Procedures – RO
Filter Flushing Procedures for Ascent CT Filter Configurations
The filters can be flushed either outside of the cooler (External) or within the cooler (Internal). Either method is appropriate and
there are instructions below for both External and Internal flushing for both the RO filtration system and the Micro filtration
system.
RO Filtration: External Flushing
1. Remove all filters from the unit.
2. Use remotely mounted filter heads for flushing process.
3. Run water through the sediment, pre-carbon, pH filter and post carbon filter according to the instructions on the
filter label.
3.1. The sediment and pre-carbon filters may be flushed in series, the other filters should be flushed
independently.
3.1.1. The post-carbon filter should be reversed flushed to avoid carbon flowing into the sediment portion of the
filter.
3.2. To flush RO, run water through all filters in sequence for no less than 20 minutes or in accordance with the
filter label.
CAUTION: Do not run water directly to RO without first running through the pre-filters. Chlorine
will damage the RO membrane.
3.3. Flush for the minimum amount of time in accordance with the instructions on the filter label.
3.3.1. Flush longer to reduce the TDS level.
3.3.1.1. Check the TDS from exit of the post filter.
3.3.2. Drain from output of filter manifold.
3.3.3. TDS after the RO should be approximately a 95% reduction verses the city water TDS level.
3.3.4. The pH filter will add approximately 8 - 10 PPM of TDS to the water.
RO Filtration: Internal Flushing
1. Flush pre-filters in a series
1.1. Connect the water source line to the input of the filter manifold.
1.1.1. Top left input
1.1.2. You may also remove the line from the output of the leak stop and connect to this tubing using a coupler
1.2. Connect a drain line to the tubing that is connected to the input of the solenoid valve.
1.2.1. The solenoid valve is placed between the pre-carbon filter and the RO.
1.2.1.1. Connecting the drain line to this tubing will allow the water to flow through the first two
filters without passing to the other filters.
1.2.1.1.1. Turn water on for 5 minutes
2. Flush the pH filter
2.1. Remove the pre-carbon filter and replace it with the pH filter
2.2. Turn water on for 5 minutes
2.2.1. This will flush water through the sediment and then the pH filter allowing the pH to be flushed
To Next Page