Installation - Pentair FP4000 Series Owner's Manual

INSTALLATION

REPLACING AN OLD PUMP
HAZARDOUS VOLTAGE
before working on pump or motor.
1. Drain and remove the old pump. Check the old pipe for
scale, lime, rust, etc. Replace, if necessary.
2. Install the pump in the system. Make sure that all pipe
joints in the suction pipe are air-tight and water-tight. If the
suction pipe can suck air, the pump will not be able to pull
water from the well.
3. Adjust the pump mounting height so that the plumbing
connections do not put a strain on the pump body. Support
the pipe so that the pump body does not take the weight of
piping or fittings.
WELL POINT (DRIVEN POINT) INSTALLATION
1. Drive the well, using drive couplings and a drive cap. Drive
fittings are threaded all the way through and allow the pipe
ends to butt against each other so that the driving force of
the maul is carried by the pipe and not by the threads.
The ordinary fittings found in hardware stores are not
threaded all the way through the fitting and can collapse
under impact. Drive fittings are also smoother than
standard plumbing fittings, making ground penetration
easier.
2. Mount the pump as close to the well as possible.
Figure 1: Driven Point Installation
4
. Disconnect power to pump
3. Use the fewest possible fittings, especially elbows, when
connecting the pipe from the well point to the pump suction
port. The suction pipe should be at least as large as the
suction port on the pump. Include a check valve if your
pump is not equipped with one (Figure 1).
Support the pipe so that there are no dips or sags in the
pipe, so it doesn't strain the pump body, and so that it
slopes slightly upward from the well to the pump (high spots
can cause air pockets which can air lock the pump).
Seal the suction pipe joints with PTFE pipe thread sealant
tape. Joints must be air-tight and water-tight. If the suction
pipe can suck air, the pump cannot pull water from the well.
If one well point does not supply enough water, consider
connecting two or three well points to one suction pipe.
4. Proceed to the Discharge Pipe and Tank Connections
section.
CASED WELL INSTALLATION, 2" OR LARGER CASING
1. Mount the pump as close to the well as possible.
2. Assemble the foot valve, strainer, and well pipe (Figure 2).
Make sure that the foot valve works freely.
3. Lower the pipe into the well until the strainer is 5 feet
above the bottom of the well. It should also be at least 10
feet below the well's water level while the pump is running
in order to prevent the pump from sucking air. Install a
sanitary well seal.
Figure 2: Cased Well Installation
P15002 (11-01-22)