Perflex™ Extended Cycle Filtration System _____________________________________
Start-Up & Operation (cont.)
Gauge/Inspection Port Adapter
The gauge/inspection port adapter provides an easy way to look into the filter at the "top" area of the tube nest
assembly. It gives a quick inspection capability to check the tube nest condition (algae, calcium or D.E. build-up,
etc.), without requiring removal of the filter head. It also allows you to wash off trapped debris and excess D.E. from
between the Flex-Tubes and from under the tube sheet by spraying with a garden hose.
To remove adapter - Shut off pump and valves, and drain water in filter to below port. Unscrew adapter, with gauge,
counterclockwise.
To re-install - Thread adapter, with O-ring in place, securely into filter housing.
Preventative Maintenance
While Perflex filters are basically resistant to the difficulties often encountered as a result of chemical build-up in
swimming pools, it is important to keep in mind that the mineral content in a pool increases every day as a result of
the chemicals and the normal water evaporation process. If the concentration of minerals is allowed to get too high,
the minerals will form deposits on the Flex-Tubes inside the filter, and will eventually result in shortened filter cycles.
To guard against this, a yearly chemical cleaning (soaking) of the Flex-Tube assembly is suggested. Use
commercially available 20% muriatic acid added to water in 1 to 1 ratio; OR use other commercial filter element
cleaner mixed in accordance to the package instructions.
WARNING – Use a plastic container and take extreme care – harmful to eyes, skin, and
clothing. Always wear rubber gloves and eye protection.
WARNING – Do NOT add water to acid.
WARNING – Do NOT mix chlorine and acid.
After cleaning, thoroughly flush all affected parts with cold water.
Winterization
In areas where sub-freezing temperatures can be expected, the filter should be drained and removed from its operating
location and stored indoors. Prior to removal, cycle the filter as described under "Cleaning".
Service & Repairs
Consult your local authorized Hayward-Perflex dealer or service center. No returns may be made directly to the
factory without the expressed written authorization of Hayward Pool Products, Inc.
Pool Chemistry Guidelines
Action Required to Correct Pool Chemistry
Suggested Pool Chemistry Levels
To Raise To Lower
pH 7.2 to 7.6 Add Soda Ash Add Muriatic Acid or Sodium Bisulphate
Total Alkalinity 100 to 130 ppm Add Sodium Bicarbonate Add Muriatic Acid
Chlorine (Unstabilized) 0.3 to 1.0 ppm Add Chlorine Chemical No action - Chlorine will naturally dissipate
Chlorine (Stabilized) 1.0 to 3.0 ppm Add Chlorine Chemical No action - Chlorine will naturally dissipate
Chlorine Stabilizer 40 to 70 ppm
(Cyanuric Acid)
Add Stabilizer Dilution - partially drain & refill pool with water that
has not been treated with Cyanuric Acid.
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