6
Installation (continued)
requirements.
TESTING AND CERTIFICATION
All suction inlet covers must comply with ASME/ANSI A112.19.8B specifications for suction fittings for use in swimming pools, spas and
whirlpool bathtub applications. The product must be tested for compliance with the standards and the certification must be included with
the components.
Single or Multiple Pump Circulation Systems must be provided with a minimum of 2 (two) suction inlets of the approved type.
Do not install multiple pumps in one hydraulic circuit. The pump is not designed to accept output flow from another pump. Do not allow
water to back flow through the pump. Water flowing in the discharge and out the suction during an upset condition can cause the motor
to rotate backwards. Never attempt to start the pump if the shaft is rotating due to a hydraulic turbine action. This could cause pump to
operate in reverse and damage internal components.
OUTLETS PER PUMP
Provide at least two hydraulically balanced main drains, with covers for each swimming pool pump suction line. The centers of the main
drains suction fitting must be at least 3 ft. apart (see Figure 2). The system must be built so that it cannot operate with the pump drawing
water from only one main drain. Two main drains must be connected to the pump whenever it is running. If two main drains run into a
single suction line, the single suction line can be equipped with a single valve that shuts off both main drains from the pump.
A valve in
each suction line is not allowed.
PIPING
Use at least 1-1/2” (38mm) pipe (use 2”(51mm) pipe if possible). 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.
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.
DV FLO pump includes 1 1/2” female NPT, or 2” slip-fit connections.
APEX Series pumps include 2” female NPT connections.
Figure 4 - DV FLO
