Section I; How Your Filter Works; Section I. How Your Filter Works - Pentair Swimming Pool Filter Owner's Manual

Section IX. Technical Data
Replacement Parts System
Item No. Part No. Description
1 272531 Valve
2 152165 Clamp Assmy
3 155050 Gauge
4 272541 O-Ring
5 150055 Drain Assmy, complete
6 152229 Standpipe Assmy SD35
6 152228 Standpipe Assmy SD40
6 152227 Standpipe Assmy SD60
6 152226 Standpipe Assmy SD80
7 150084 Lateral (SD35, SD40)
7 150085 Lateral, Xlong (SD60, SD80)
8 154526 Base, (SD35)
8 154520 Base, Large (SD40, 60, 80)
9 145339 SD 35, Tank Almd
9 145340 SD 35, Tank Gray
9 145345 SD 35, Tank Black
9 145341 SD 40, Tank Almd
9 145342 SD 40, Tank Gray
9 145346 SD 40, Tank Black
9 145343 SD 60, Tank Almd
9 145344 SD 60, Tank Gray
9 145347 SD 60, Tank Black
9 145334 SD 80, Tank Almd
10 155051 Sand Guide
Clamp Assmy includes 2 halfs of clamp, 2 screws & 2 nuts
Model Filter Area Lbs. Of Sand
Sq. Ft. Required
SD35 1.23 100
SD40 1.9 150
SD60 2.3 200
SD80 3.4 350
P/N 99223000
Max. Working Vrtl Clearance Design Flow
Pressure Required Rate GPM
30 45 35
35 49 40
40 55 60
50 60 75
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Section I.

How Your Filter Works.

Your high rate sand filter is designed to produce clear,
sparkling water and operate for years with a minimum
of maintenance when installed, operated and main-
tained in accordance with these instructions.
Your filter uses special filter sand to remove dirt par-
ticles from the water. Dirt is collected in the filter by
the sand bed as water flows through the filter. Water
enters the filter through the valve on top of the filter
and is distributed evenly downward across the sand
bed. The dirt is removed by the sand and the clean
water flows through the piping (laterals) at the bottom
of the filter, up through the standpipe, back to the
valve on top of the filter, where the clean water is
returned to the pool through the piping or hoses.
This filter operates under high pressure. When any part of
the circulating system (e.g., clamp, pump, filter, valves,
etc.) is serviced, air can enter the system and become pres-
surized. Pressurized air can cause the lid or control valve to
blow off which can result in severe injury, death, or proper-
ty damage. To avoid this potential hazard, follow these
instructions.
1. Before repositioning valves and before beginning the
assembly, disassembly, or adjustment of the clamp or
any other service of the circulating system: (a) Turn the
pump off and shut off any automatic controls to ensure
the system is not inadvertently started during the servic-
ing; (b) Open manual air relief valve; (c) Wait until all
pressure is relieved, pressure gauge must read zero (0).
2. Whenever installing the filter clamp, follow the filter lid
and clamp installation instructions exactly.
3. Once service on the circulating system is complete,
follow system restart instructions exactly.
4. Maintain circulation system properly. Replace worn or
damaged parts immediately (e.g., clamp, pressure gauge,
Max Water relief valve, o-rings, etc.).
Temp.
5. Be sure that the filter is properly mounted and positioned
according to instructions provided.
95 F
95 F
95 F
95 F
Rev. E 2-22-02 P/N 99223000
After a period of time, dirt will accumulate in the fil-
ter causing a resistance to the flow of water through
the filter. This resistance results in a diminished flow
of water and a rise in the pressure of the filter.
Eventually the filter sand will have removed so much
dirt and the filter pressure risen to such a point that it
will be necessary to clean (backwash) your filter.
By setting the valve on top of the filter to the back-
wash position, the flow of water is automatically
reversed through the filter so that the flow of water is
directed to the bottom of the filter, up through the sand
bed flushing, the dirt and debris out through the waste
line. Once the backwash procedure is complete, the
valve is manually returned to its filter position to
resume normal filtration.
The filter's function is to remove suspended matter
WARNING
from the water. It does not sanitize the water. For
!
sparkling clear water the water must be sanitized as
well as balanced. Pool chemistry is a specialized area,
and you should consult your local pool service spe-
cialist for specific details. In general, proper pool san-
itation requires a free chlorine level of 1 to 2 PPM and
a PH range of 7.2 to 7.6.
Failure to operate your filter system or inadequate filtration
can cause poor water clarity obstructing visibility in your
pool. Poor water clarity may obscure objects in the water
which while swimming and diving could cause severe
personal injury or death. Never swim in a pool with poor
water clarity.
Your filtration system should be designed to meet
your local health codes. As a minimum, you must be
sure that your system will turnover the total volume of
water in your pool at least twice in a twenty-four hour
period.
Failure to operate your filter system or inadequate filtration
can cause poor water clarity obstructing visibility in your
pool and can allow diving into or on top of obscured
objects, which can cause serious personal injury or
drowning.
3
WARNING
!
WARNING
!
Rev. E 2-22-02