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Jandy
Sand Filter SFSM | Installation & Operation Manual
®
3.2
Plumbing
WARNING
To avoid an electrical shock hazard, which can result in serious injury
or death, ensure that all electrical power to the system is turned off
before approaching, inspecting or troubleshooting any leaking valves
or plumbing that may have caused other electrical devices in the
surrounding area to get wet.
This filter operates under pressure. Install only on the
discharge side of a pump system.
When the lid is installed properly and the filter is
operated without air in the water system, this filter
will operate in a safe manner.
If the system can be subjected to a higher
pressure than the maximum pressure rating of any
component, install an ASME
pressure relief valve or pressure regulator in the
circulation system. Set the relief valve or pressure
regulator to lowest working pressure of any of the
components in the system.
DO NOT INSTALL a positive shutoff valve on the
outlet plumbing of the filter. If the pump is operated
with a closed valve at the outlet, an explosive
condition could result. Sometimes equipment
isolation valves are required for installations where
the filter and other equipment are below the pool
water level. Check valves should be used to allow
for equipment maintenance without draining down
the pool. If the application calls for positive or
manual shutoff valves, any shutoff valves are to
be prominently labeled "WARNING: Explosive
Hazard. Do Not Run System With Valve Closed."
In addition, the use of isolation valves could cause a
no flow condition at other equipment. Running any
equipment with no flow could seriously damage the
equipment.
Chemical feeders and/or chlorine generators should
be installed downstream of both the filter and the
heater and a check valve should be installed to
prevent treated water from back flowing from the
chlorine generators or chemical feeders.
CAUTION
Operating at high vacuum levels can cause the tank vessel to crack
and leak with the potential for property damage.
compliant automatic
®
Backwash (waste) piping that discharges water at an
elevation of 10 ft. or lower than the water surface of
the pool should be equipped with a vacuum-breaker
in the waste piping within 10 ft. in vertical drop from
the elevation of the pool surface.
3.2.1 Plumbing Connections
1.
Place the filter on the concrete pad, lined up
with the inlet/outlet pipes. See Figure 3.
• To reduce the loss of pressure, it is
recommended to use a pipe equal to or
greater than the diameter of the outlets,
for the installation of the system.
2.
Install the backwash valve.
• Connect the inlet and outlet plumbing to the
valve as detailed in the valve manual.
• For best efficiency use the fewest possible
number of fittings. This will prevent a
restriction in the water flow.
• Make all plumbing connections in accordance
with local plumbing and building codes.
• Filter connections are provided with an o-ring
seal. To avoid damage to the O-Rings, use
only a silicone base lubricant on the O-Rings.
• DO NOT USE pipe joint compound, glue or
solvent on union coupling nuts.
• Do not use Teflon
unions.
• Keep piping tight and free of leaks.
Pump suction line leaks may cause air to
be entrapped in filter tank or loss of prime
at the pump.
• Support the inlet/outlet pipes independently
to prevent any undue strains on the
backwash valve.
3.3
Fill the Filter
Jandy high rate sand filters most commonly use
sand as a filter medium, or sand over a shallow layer
of pea gravel. See Figure 2. The use of filter media
other than sand is also described in Setup section,
Alternative Filter Media.
ENGLISH
tape or pipe dope on any
®
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