Installation (Well Pumps); Replacing An Old Pump - Pentair STA-RITE SN Serie Manual Del Propietário

Installation

REPLACING AN OLD PUMP

Hazardous voltage. Disconnect power to
pump before working on pump or motor.
1. Drain and remove the old pump. Check the old pipe
for scale, lime, rust, etc., and replace it if necessary.
2. Install the pump in the system. Make sure that all pipe
joints in the suction pipe are air-tight as well as 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.
You have just completed the well plumbing for your
new shallow well jet pump. Please go to Page 6 for
discharge pipe and tank connections.
WELL POINT (DRIvEN POINT)
INSTALLATION (FIGURE 1)
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.
To Household
Water System
Not
to
Scale
Figure 1: Driven Point Installation
Pump Priming
Tee and Plug
Suction Pipe
From Well
Priming
Tee and
Plug
Check
Valve
Drive point
below water
level
Drive
Coupling
Drive
Point
2346 0396
2. Mount the pump as close to the well as possible.
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 – see 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- 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.
You have just completed the suction piping for your
new shallow well jet pump. Please go to Page 6 for
discharge pipe and tank connections.
CASED WELL INSTALLATION, 2" OR
LARGER CASING (FIGURE 2)
1. Mount the pump as close to the well as possible.
2. Assemble the foot valve, strainer, and well pipe (see
Figure 2). Make sure that the foot valve works freely.
3. Lower the pipe into the well until the strainer is five
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.
To Household
Water System
Not
to
Scale
Figure 2: Cased Well Installation
Pump Priming
Tee and Plug
Suction Pipe
From Well
Check Priming
Valve Tee and
Plug
Sanitary
Well Seal
Well
Casing
Foot
10'
Min. Valve
5–10'
2347 0396
4