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Water Velocity
The maximum water velocity through the suction fitting
or cover for any suction outlet must not exceed 1.5 feet
per second unless the outlet complies with the latest
ANSI/ASME Specification for
Suction Fittings For Use in
Swimming Pools, Spas, Hot Tubs, and Whirlpool Bathtub
Applications.
In any case, do not exceed the suction fit-
ting’s maximum designed flow rate.
If 100% of the pump’s flow comes from the main drain
system, the maximum water velocity in the pump suction
hydraulic system must be six feet per second or less even
if one main drain (suction outlet) is completely blocked.
The flow through the remaining main drain(s) must com-
ply with the latest ANSI/ASME Specification for
Suction
Fittings For Use in Swimming Pools, Spas, Hot Tubs, and
Whirlpool Bathtub Applications.
Testing and Certification
Suction outlet covers must have been tested by a nation-
ally recognized testing laboratory and found to comply
with the latest ANSI/ASME Specifications for
Suction
Fittings For Use in Swimming Pools, Spas, Hot Tubs, and
Whirlpool Bathtub Applications.
Fittings:
Fittings restrict flow; for best efficiency use fewest possi-
ble fittings (but at least two suction outlets).
Avoid fittings which could cause an air trap.
Pool fittings must conform to International Association of
Plumbing and Mechanical Officials (IAPMO) standards.
Use only non-entrapping suction fitting or double suction.
ELECTRICAL
Ground motor before
connecting to electrical
power supply. Failure to
ground motor can cause se-
vere or fatal electrical shock
hazard.
Do not ground to a gas
supply line.
To avoid dangerous or
fatal electrical shock,
turn OFF power to motor be-
fore working on electrical
connections.
Ground Fault Circuit
Interrupter (GFCI) trip-
ping indicates an electrical
problem. If GFCI trips and
will not reset, have a qualified
electrician inspect and repair electrical system.
Exactly match supply voltage to nameplate voltage.
Incorrect voltage can cause fire or seriously dam-
age motor and voids warranty. If in doubt consult a li-
censed electrician.
Voltage
Voltage at motor must be not more than 10% above or
below motor nameplate rated voltage or motor may over-
heat, causing overload tripping and reduced component
life. If voltage is less than 90% or more than 110% of
rated voltage when motor is running at full load, consult
power company.
At Least
3 Feet
Suction Outlet
(Main Drain)
Suction Outlet
(Main Drain)
IAPMO Certified
Anti-entrapment
Cover or Suction Fitting,
screw-fastened to
Main Drain Sump
IAPMO Certified
Anti-entrapment
Cover or Suction Fitting,
screw-fastened to
Main Drain Sump
Pump
Valves OK between
pump and Tee
No valves between
Tee and Main Drains
2762 0197
Figure 3 – Recommended pump suction layout.
Hazardous voltage.
Can shock, burn,
or cause death.
Disconnect power
before working
on pump or motor.