Five Star JHP - Manual (Page 9)

Page 9
3.1.3 Pipe Sizing
NOTE All HP ratings given in this section apply to Full-
rated pumps. For help with max-rated pumps,
contact Jandy Customer service.
3.1.3.1 Suction Pipe
When the pump is located up to 50 feet from the
pool, the recommended minimum pipe size for the
suction side of the pump is 2" for ¾ to 1½ HP*.
For 2 HP* pumps recommended pipe size is 2½".
For 3 HP* pumps, recommended pipe size is 3".
* HP refers to full rated pumps
3.1.3.2 Discharge Pipe
When the pump is located up to 50 feet from the
pool, the recommended minimum pipe size for the
discharge side of the pump is 2" for ¾ to 1½ HP*.
For 2 HP* pumps recommended pipe size is 2½".
For 3 HP* pumps, recommended pipe size is 3".
* HP refers to full rated pumps
NOTE All pipe sizes are able to withstand the pressures
the pump will deliver, but not the flow. If the pipe
is too small for the pump, or it is elevated above
water, the maximum gallons per minute (GPM)
may not be delivered and the pump will make
noise and shorten pump life. (cavitate)
3.1.3.3 Installation Recommendations
1. If the pump is located below water level,
isolation valves must be installed on both sides
of the pump to prevent back flow of pool water
during any routine or required servicing.
2. To help prevent difficulty in priming, install the
suction pipe without high points (above inlet of
pump - inverted "U's" in plumbing), which can
trap air. For installations of equipment up to 100
feet from the water, refer to the pipe sizing chart,
Table 1. For installations of equipment more than
100 feet from the water, the recommended pipe
must be increased to the next size.
Table 1. Pipe Sizing Chart for Schedule 40 PVC
Pipe
Size
Maximum Flow
Suction
(8 feet per second)
Maximum Flow
Discharge
(10 feet per second)
1½" 50 GPM (189 LPM) 65 GPM (246 LPM)
2" 85 GPM (322 LPM) 105 GPM (397 LPM)
2½" 120 GPM (454 LPM) 149 GPM (564 LPM)
3" 184 GPM (697 LPM) 230 GPM (871 LPM)
3. Stealth Pumps come equipped with unions on
both the suction and discharge ports. This feature
simplifies installation, service, and eliminates
the possibility of leaks at threaded adapters.
4. The Stealth Pump must be connected to at least
two (2) hydraulically balanced main drains for
each pool pump suction line. Each drain must be
provided with covers that are listed or certified to
ANSI/ASME A112.19.8. The suction fittings of
the main drains must be at least three feet apart
or at different planes. The suction fittings can be
a drain and skimmer, two drains, two skimmers,
or a skimmer with an equalizer line installed.
Check the local codes for proper installation.
NOTE To prevent entrapment, the system must be built
so that it cannot operate with the pump drawing
water from only one main drain. At least two main
drains must be connected to the pump when it is
in operation. However, if two main drains run into
a single suction line, the single suction line may
be equipped with a valve which will shutoff both
main drains from the pump.
5. The piping must be well supported and not
forced together where constant stress will be
experienced.
6. Always use properly sized valves. Jandy ®
Diverter Valves and Jandy ® Ball Valves typically
have the best flow capabilities.
7. Use the fewest fittings possible. Every fitting
added has the effect of moving the equipment
farther away from the water.
NOTE If more than ten (10) suction fittings are needed,
the pipe size must be increased.
8. Every new installation must be pressure tested
according to local codes.
WARNING
Do not pressure test above 35 PSI. Pressure
testing must be done by a trained pool professional.
Circulation equipment that is not tested properly
will fail, which could result in severe injury or
property damage.
WARNING
Trapped air in system can cause pump lid to be
blown off which can result in death, serious injury,
or property damage. Be sure all air is properly
out of system before operating. DO NOT USE
COMPRESSED AIR TO LEAK OR PRESSURE
TEST.