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Jandy
®
Commercial Horizontal Sand Filter | Installation & Operation Manual
ENGLISH
5.7 Head Loss Curve for #20 Silica Sand
WARNING
Wear all required Personal Protection Equipment (i.e. goggles, gloves,
respirator, etc.) when installing the Filter Media.
Filter systems are certified by NSF International
to ANSI / NSF Standard 50 for both pool and spa
applications at filtration rates of 5 to 20 U.S. GPM
/ sq. ft. when installed with #20 silica sand or any
NSF 50 certified media.
0
100
200
300
400
500
600
0
0.75
1.6
2.5
3.5
4.6
6.15
US
G
P
M
PSIG
JANDY SFHT TOP PIPED HORIZONTAL FILTER
SFHT4296
SFHT3484
SFHT3472
SFHT4284
SFHT4272
SFHT3461
Figure 8. Sand Head Loss
5.8 Differential Pressure
• Filter systems will have varying head loss, which
is dependent upon filter media and operational
flow rates.
• Filters should be backwashed when 15 PSIG
differential is indicated on the influent and effluent
pressure gauges.
• When sizing the main circulation pump, calculate
maximum head loss at 15 to 20 PSIG through the
filter and top piping.
• Several components will contribute to Total Filter
System Head Loss and need to be considered
during initial design, troubleshooting and/ or
service.
• The key critical components are the filter tank
(including type of filter media), control valves and
piping kits.
Section 6. Troubleshooting
For a list of common problems and solutions see the
Troubleshooting Guide.
Zodiac Pool Systems LLC recommends that you call
a qualified service technician to do any work on the
filter/pump system.
To locate a service company near you, please
visit ZodiacPoolSystems.com. For technical
support, please call 1.800.822.7933 or email
Section 7. Product Specifications
and Replacement Parts
For a complete list of replacement parts, please visit
www.Jandy.com or contact Technical Support at
1.800.822.7933 or
email [email protected]
In Canada, please call 1.888.647.4004 or
email [email protected].
