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Pentair FNS Plus Pool
Filters
  
The culmination of
40 years of pool filter experience
Trap more dirt. Clean
less often.
The FNS PLUS filter's
time-tested design offers you maximum performance, convenience, and reliability
for year after year of sparkling clear pool enjoyment. With the FNS PLUS D.E.
filter, you'll enjoy sparkling clear water from the most effective filtration
system you can buy. And because they're designed to extend the time between
cleanings, you can spend more time enjoying your pool instead of maintaining it
Filtering with
diatomaceous earth (D.E.) results not just in clean water, but water that really
sparkles. That's because D.E. filters remove particles as small as 3–5
microns.
Even though particles
smaller than 40 microns can't be seen with the naked eye, large quantities of
these microscopic contaminants have a very noticeable effect on water clarity.
And D.E. strips them away. D.E. filters not only filter better, they can make
your life easier...if two goals are met. First, is to maximize the filtration
area. Because more filter area means much longer periods between cleanings.
Second,
is to design a system that requires the least amount of pumping power to achieve
a needed flow rate. Because lower pumping power means lower utility costs
That's why all Pentair D.E. filters feature curved D.E. grids to
maximize surface area. It's why their internal design has been refined
over decades to absolutely minimize flow restrictions. No wonder more than
2 million Pentair filters have been installed worldwide.
Key Benefits
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Chemical-resistant
fiberglass-reinforced polypropylene tank for exceptional strength and long life.
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Attractive
almond-colored tank blends into any backyard environment.
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Easily
removable filter grid pack is secured by a single nut to simplify maintenance.
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HIFLOW* manual air relief valve and continuous internal air relief eliminate air
buildup from tank to maintain efficient filtration and prevent
over-pressurization.
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Conveniently
located 1-1/2" drain for easy and efficient cleanout.
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Unique
internal design ensures optimal filtration and backwashing efficiency for longer
runs between cleanings.
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Compatible
with all sanitizing chemicals.
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Curved
vertical grids provide maximum filter surface area for better cleaning.
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TENSION
CONTROL* clamp for secure tank closure.
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Leak-proof
plumbing connections.
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FLOW
RATE (1)
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Product
Number
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Sq.
Ft.
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Dim.
A
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Dim.
B
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FLOW
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D.E.
Required
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GPM
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GPH
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6hrs.
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8hrs.
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180006
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24
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37 in.
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48 in.
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48
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2,880
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17,280
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23,040
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2.4 lbs.
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180007
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36
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43 in.
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62 in.
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72
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4,320
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25,920
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34,560
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3.6 lbs.
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180008
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48
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49 in.
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74 in.
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96
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5,760
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34,560
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46,080
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4.8 lbs.
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180009
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60
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55 in.
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86 in.
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120
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7,200
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43,200
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57,600
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6.0 lbs.
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| 1.
Flow rate is based on 2.0 GPM per sq. ft. of filter area. Actual
system flow will depend on plumbing size and other system components |
FILTER FAQ's
| Can
I use Fiber Clear instead of the traditional D.E. in my FNS Plus Filter? |
| Yes,
that is an acceptable filter media. However, we have found that it tends
to need backwashing much more often than with D.E. |
| Where
is the model number located on my Pentair filter? |
| The
filter's model number and serial number are on the label on the filter
tank. The label has a punched hole indicating the model number of the
filter. |
| I
have a D.E. Filter. Why is it that every time I vacuum and run the
filter, I have D.E. on the bottom of the pool an hour later? |
| It
would be best to vacuum up the D.E. in the pool and then add D.E. if you
know how much is in the filter after you do this. If you don't, then
vacuum up the D.E., backwash the filter, and add approx. 80% of the
total amount recommended on initial filter D.E. start up. Clean the
filter grids well and look closely at them for any holes. The slightest
hole can allow D.E. to go through the filter. Also, the manifold at the
top should be examined closely for any cracks or holes. Lastly, check
all pipes to see if their associated o-rings are ripped, torn or
missing. Replace as needed. |
| Why
is dirt passing through my sand filter? |
| A
number of things could be causing the problem. It could mean that a
lateral is cracked or broken, or a valve may need servicing. Or, air may
be passing through the filter, causing a channeling effect that permits
dirt to get by the filter. In the latter case, there may be nothing
wrong with the filter. |
| What
is the difference between the TRITON* C and the TRITON C-3 filters? |
| The
difference between the TRITON* C and the TRITON C-3 is that the C is a
standard bulkhead plumbing 2" connection and the C-3 is a 3"
flanged connection. |
| Is
there any way of sealing a leak in a filter tank? |
| Unfortunately,
there is no way to safely seal a leak in a filter tank. The best option
is to replace the tank. |
| I
have a 10 year old sand filter. How can I determine if the sand needs to
be replaced? |
| The
general recommendation is to backwash your filter when the pressure
reaches 10 psi over the initial start up pressure. For example, if the
start up pressure is 15psi, you should backwash when the pressure
reaches 25psi. If the pressure does not return to the start up pressure
after backwashing, it is time to change the sand. |
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