5
Piping:
Use at least 1-1/2" IPS PVC pipe with 5” (127mm) trap. Use at least 2” pipe
with 6” (152mm) trap. Increase size if a long run is needed.
To avoid strains on the pump, support both suction and discharge pipes
independently. Place these supports near the pump.
To avoid a strain left by a gap at the last connection, start all piping at the
pump and run pipe away from the pump.
Never use a suction pipe smaller than pump suction connection. To avoid
airlocking, slope suction pipe slightly upward toward the pump.
NOTICE: To prevent flooding when removing pump for service, all flooded
suction systems must have gate valves in suction and discharge pipes.
Fittings:
Fittings restrict flow; for best efficiency use fewest possible fittings.
Avoid fittings which could cause an air trap.
Pool fittings must conform to International Association of Plumbing and
Mechanical Officials (IAPMO) standards.
To reduce risk of suction entrapment, do not exceed the rated flow rate of the
suction fittings.
POOL PUMP SUCTION
REQUIREMENTS
Pump suction is hazardous and can trap and drown or disem-
bowel bathers. Do not use or operate swimming pools, spas, or hot tubs if a
suction outlet cover is missing, broken, or loose. Follow the guidelines below
for a pump installation which minimizes risk to users of pools, spas, and hot
tubs.
Entrapment Protection
The pump suction system
must provide protection against the hazard of
suction entrapment or hair entrapment/entanglement.
Suction Outlet Covers
All suction outlet covers must be maintained. They must be replaced if
cracked, broken, or missing.
See below for outlet cover certification requirements.
All suction outlets must have correctly installed, screw-fastened covers in
place.
Testing and Certification
Suction outlet covers must have been tested by a nationally recognized testing
laboratory and found to comply with the latest ASME/ANSI Specification for
Suction Fittings For Use in Swimming Pools, Spas, Hot Tubs, and Whirlpool
Bathtub Applications.
