Wellsys W5 User manual

W5 FILTER FLUSHING
Before starting the installation, any filters being used to filter the source water for the unit
must be flushed. This is important to rinse any loose carbon or debris from the filters so that it
does not plug another filter or membrane or end up inside the unit. DO NOT install and setup
the unit before flushing the filters.
Whether the unit is paired with RO (Reverse Osmosis) or UF (Ultra filtration) filter
configurations, there is a basic idea that applies to both: the filters, especially the carbon filters,
must be flushed or “rinsed.” This section will cover how to do this process.
Regardless of the setup used, all sediment and carbon filters must have several gallons of water
flushed through them to properly rinse the filter. The filters should be flushed in the same
direction as flow (with one exception).
1. To begin, you will need a ¼” LLDPE tube connecting the unit to a water
supply, connected at the “Water In” port on the back of the machine. Install a
¼-turn valve just before the unit to easily turn the water on and off.
2. Have a bucket, pitcher, or sink ready to catch the flush water.
3. Remove the drip tray from the unit by pulling straight out. Once removed, locate the
single screw that holds the lower front panel in place and remove it.
4. Remove the lower front panel of the unit. Press down on the top of the lower panel,
then pull away. The panel should hinge outward, and then come away from the unit
completely. Set this panel aside.

5. Locate the precarbon filter (front and center) and look to the right side of the filter
head. Disconnect the tube at the right side port of the precarbon filter from the elbow
fitting as shown. Remove the RO filter (twist-tied to the inside of unit), the Biosure filter,
and the TCR filter . With an extra section of ¼” LLDPE tubing (about 2-5ft long), plug this
into the open elbow on the right side of the filter head, and run the other end to a
bucket or drain/sink.
6. Open the ¼-turn valve on the supply line. Water will rush into the sediment and
precarbon filter and exit from the outlet into the bucket/sink. Allow 2 gallons (roughly
estimated) to flow out of the filters.
7. Once this is achieved, turn off the valve, disconnect the precarbon filter, and set it aside.
Place the Biosure filter into the head to the right of the sediment filter. Repeat flushing
process for the Biosure filter for at least 2 gallons.
Drain Line to
Bucket or Sink

8. Once complete, turn off the valve, disconnect the Biosure filter, and return it to its
original position. Prepare the RO filter (if using RO filter configuration) by removing the
cap and inlet plug, AND the plug at the bottom in the drain port.
9. Place the RO filter into the head to the right of the sediment filter. Remove the tube
cap, and connect the RO drain tube shown. Because the RO filter produces “brine” or
reject water in its filtration, ensure the RO Drain port on the back of the machine is
plumbed with ¼” LLDPE tubing to a drain or to the same bucket as the flush water.
Repeat flushing process for the RO filter for at least 2 gallons. (If UF Filtration is being
used, there will be a UF filter to flush instead of an RO filter and no drain is required, it
would be flushed in the normal fashion as the others).
Drain Line to
Bucket or Sink

10. Return the RO Filter (or UF Filter) to the right most head. Last filter to flush is the TCR
filter, but it must be flushed in the OPPOSITE FLOW DIRECTION as the others. Remove
and reinstall the sediment filter into the second (middle) head. Now, swap the tube
connections of the supply and flush water. Then, install the TCR filter into the left-most
head. Open the supply valve and allow 2 gallons to flush through the TCR filter.
11. Return all filters to original position and restore original plumbing configurations (From
left to right on back row: TCR, Biosure; From left to right on front row: Sediment,
PreCarbon, RO). Ensure all tubing to fitting connections are tight and secure and that
the RO filter is connected to the drain as it was during flushing.
12. The filtration system is now ready to use. Return the lower front panel and drip tray to
original positions. The water supply valve can be turned on, and the unit can move
forward to the next installation step.
Drain Line to
Bucket or Sink
Supply Line