Pentair Myers 4VL Manual

8VL & 8VLX
4VL & 4VLX
NOTE! To the installer: Please make sure you provide this manual to the owner of the equipment or to the responsible
party who maintains the system.
MODELS 4VL(X*), 8SM(X*),
8VL(X*) and 12VL(X*)
*Used in Hazardous Locations Class I, Division 1
SUBMERSIBLE SOLIDS
HANDLING PUMPS
INSTALLATION AND SERVICE MANUAL
For use with product built with GE®motor.
Part # 23833A470 | © 2013 Pentair Ltd. | 02/26/13

23833A470 02/26/13 2
CAUTION!
Read these safety warnings first before installing,
servicing, or operating any pump.
CALIFORNIA PROPOSITION 65 WARNING:
This product and related
accessories contain chemicals known to the
State of California to cause cancer, birth
defects or other reproductive harm.
GENERAL:
1. Most accidents can be avoided by using
COMMON SENSE.
2. Read the operation and maintenance instruction
manual supplied with the pump.
3. Do not wear loose clothing that can become
entangled in the impeller or other moving parts.
4. This pump is designed to handle materials that
could cause illness or disease through direct
exposure.
Wear adequate protective clothing when working
on the pump or piping.
ELECTRICAL:
WARNING: Only qualied persons shall conduct
services and installations of this pump. The pump
must be wired by a qualied electrician, using an
approved starter box and switching device.
5. To reduce the risk of electrical shock, pump must
be properly grounded in accordance with the
National Electric Code and all applicable state and
local codes and ordinances.
6. To reduce risk of electrical shock, disconnect the
pump from the power source before handling or
servicing.
7. Any wiring to be done on pumps should be done
by a qualified electrician.
8. Never operate a pump with a power cord that has
frayed or brittle insulation.
9. Never let cords or plugs lie in water.
10.Never handle connected power cords with wet
hands.
PUMPS:
11.Pump builds up heat and pressure during
operation; allow time for pump to cool before
handling or servicing.
12.Only qualified personnel should install, operate or
repair pump.
13.Keep clear of suction and discharge openings.
DO NOT insert fingers in pump with power
connected.
14.Do not pump hazardous material not
recommended for pump (flammable, caustic, etc.).
15.Make sure lifting handles are securely fastened
each time before lifting.
16.Do not lift pump by the power cord.
17.Do not exceed manufacturer’s recommendation
for maximum performance, as this could cause the
motor to overheat.
18.Secure the pump in its operating position so it
cannot tip over, fall or slide.
19.Keep hands and feet away from impeller when
power is connected.
20.Submersible solids handling pumps are not
approved for use in swimming pools, recreational
water installations, decorative fountains or any
installation where human contact with the pumped
fluid is common.
21.Do not operate pump without safety devices in
place.
22.For hazardous locations, use pumps that are listed
and classified for such locations.
IMPORTANT! Myers is not responsible for losses,
injury or death resulting from a failure to observe these
safety precautions, misuse or abuse of pumps or
equipment.
GENERAL INFORMATION:
Motor HP & Voltages: These solids handling pumps
are offered in a three phase wiring configuration only.
Voltages will vary according to the application.
Electrical Controls: All of these pump models must
be used with a control panel. Myers built control
panels are designed to supply the correct electrical
controls, motor starting equipment and include
the circuitry for moisture and heat sensors. It is
recommended that a Myers built control panel be
used so that all warranties apply.
General Construction: The hazardous location series
is designed to meet Factory Mutual requirements
for Class 1, Division 1, sewage applications. They
are certified and nameplated with this approval. The
motor chamber and seal chamber are filled with a
high dielectric type oil for improved lubrication and
heat transfer of the bearings and motor. Since the
bearings have been designed for 50,000 hours of life,
the oil should never require replacement under normal
operating conditions. An air space above the oil level
in both the seal and motor chambers is provided to
allow for the expansion of the oil when at operating
temperature. The power and control lines are sealed
and strain relieved on the outside entrance with a
standard cord grip, and internally through the use of
a dielectric potting resin surrounding the electrical
wires. All of the pump fasteners and shafts are made
from corrosion resistant stainless steel, while the

23833A470 02/26/13
3
pump castings are made of ASTM A-48 Class 30 cast
iron. The wear ring is bronze and all impellers are
two vane enclosed solids handling design made from
ductile iron.
General Installation: Various configurations
and methods of plumbing this series of solids
handling pumps may be used; however, for ease of
installation and service a Myers rail lift-out system is
recommended.
Note: If the hazardous location pumps are used in
conjunction with a rail lift-out system, it must be a
Factory Mutual approved nonsparking, hazardous
location system. The Myers approved lift-out
models are:
4" Lift-out 8" Lift-out 12" Lift-out
SRAX44HH SRAX88 SRAX1212
If these Guidelines are not followed, the Factory
Mutual Hazardous Location approval is void.
Hazardous Location Service: These pumps are to
be used for handling sewage, wastewater and storm
water only. Do not use in other hazardous locations.
These pumps must be repaired and serviced only at
Myers Authorized Service Centers or at the Myers
factory. Any unauthorized field repair voids warranty
and the hazardous location rating.
CAUTION: After the pump is installed and sewage
has entered the basin there are methane and
hydrogen sulfide gases, which are poisonous.
Never enter a wet well unless the cover is open
for a sufficient period of time to allow fresh air
into the basin. It is for this reason that Myers
recommends using the rail lift-out system so that
no service is required inside the basin.
Motor: Each motor is provided with heat sensor
thermostats attached directly to the motor windings.
The thermostats open if the motor windings see
excessive heat and, in turn, open the motor contractor
in the control panel, breaking the power to the pump.
When the motor is stopped due to an overheated
condition, it will not start until the motor has cooled
and the heat sensor reset button is manually pushed.
This circuitry is provided in the Myers control panel
designs.
The thermostats are set to open at a temperature of
302°F (150°C). The maximum contact rating is 18
amps at 115 VAC and 12 amps at 230 VAC.
Note: Failure to use proper circuitry and to connect
the motor overheat protection in the control panel
would negate all warranties and Factory Mutual
approval.
Motor Seal Failure Warning: The seal chamber is
oil filled and provided with moisture sensing probes
to detect water leakage through the lower shaft seal.
The probes can also detect moisture present in the
upper motor housing.
The presence of water energizes a red seal leak
warning light at the control panel. This is a warning
light only, and does not stop the motor. It indicates
a leak has occurred and the pump must be repaired.
Normally, this indicates the outboard seal has leaked.
Allowing the unit to operate after the warning could
cause upper seal leakage along with motor failure.
The resistance across the moisture sensing (seal
failure) probes should be checked after a seal
leak warning light has lit. This can be done by
disconnecting the red and orange control wires from
the control panel and measuring the resistance with
an ohmmeter between the wires. If the measured
values are below specification, then the pump may
have a lower seal failure and require service.
On the Myers hazardous location control panels
the seal leak test switch tests the seal leak circuit
continuity. When pushed the seal leak test bulb
should light. If the test bulb does not light it means
either the wiring circuitry to the seal leak probes has
been broken or the bulb has burned out.
Note: Myers built control panels supply the correct
circuitry for moisture and heat sensor connections.
Failure to install the correct circuitry with proper
connection would negate warranty and Factory
Mutual approval.
Motor Power Cord, Control Cord and Cord Cap
Assembly: Each motor power cord has 4 conductors:
white, black, red and green. For a three phase motor
the red, black and white conductors connect to the
three line leads, and the green is connected to a good
ground. Interchanging any two line leads will reverse
the rotation of the motor.
Note: Rotation should be clockwise when observed
from the top of the pump. This can be checked by
noting which direction the pump torque is up on
initial starting. A properly rotating pump will torque
counterclockwise upon start.
The control cable has 5 conductors: black, white,
red, orange and green. White and black connect to
the heat sensor terminals in the control panels; red
and orange connect to the seal failure terminals in the
control panel; and the green connects to the ground in
the control panel.
The cord cap is epoxy potted. The cord cap provides
for a sealed wire connection with terminals so that
connections can be made without breaking the motor
seal. A hazardous location junction box is required for

23833A470 02/26/13 4
hazardous locations. The control and power cables
cannot be spliced!
Note: Each cable has a green ground wire and must
be properly grounded per the National Electric Code
and local codes.
Electrical Motor Controls: All electrical controls and
motor starting equipment should be as specified in
these instructions. Consult factory for any acceptable
alternates. For hazardous locations the controls and
control panel must be installed outside the hazardous
area, or approved hazardous location controls that are
intrinsically safe must be used.
Junction Box: If a junction box is used in a
hazardous location, it must be a hazardous location
approved type with hazardous location cord
connectors. Wires from the junction box must pass
through a hazardous location seal connector.
Level Sensing Controls: Intrinsically safe type
float controls are recommended for all applications
and required for hazardous location service. An
intrinsically safe control panel relay will limit the
current and voltage to the level controls. A Myers
control panel can be supplied with this type circuitry.
The float level controls maintain the basin sewage
water level by controlling pump turn-on and turn-off
levels.
1. The lower turn-offs control should be set so that
the pump stops at approximately the top of the
pump. Consult the factory for any settings below
this point.
2. The upper turn-on control should be set above the
lower turn-off control. The exact height between
the two controls is determined by the number of
pump starts desired and the depth of the basin.
A maximum of 10 starts per hour should not be
exceeded.
3. The override control is set at a specified height
above the upper turn-on control.
4. The alarm control is set about 6" to 12" above the
override control.
5. No control should be set above the inlet invert.
Electrical Connections: All electrical wiring must
be in accordance with local code and only qualified
electricians should make the installations. All wires
should be checked for shorts to ground with an
ohmmeter or megger after the connections are made.
This is important, as one grounded wire can cause
failure of the pump, control panel or personal injury.
Pump: The fluid end of the pump is field serviceable
and can be disassembled in case of wear, damage,
plugging or outboard seal failure. The following will
describe the disassembly and reassembly process.
WARNING: Disconnect pump from power source
before servicing or handling pump.
DISASSEMBLY:
1. With the pump located in a secure place, remove
the bolts fastening the seal housing to the volute.
The motor and impeller can now be removed as a
unit.
2. Lay the unit down on its side. If the lower seal is
to be removed, it is recommended that the oil in
the seal chamber be drained. This can be done by
removing the lower seal chamber plug and draining
the oil into a holding container.
3. To remove the impeller: Using a proper wrench,
the impeller retaining bolt and washer must be
removed. This may require a piece of wood placed
between the vanes to keep the impeller from
rotating while removing the bolt. Once the bolt has
been removed, tap lightly with a hammer around
the outside diameter of the impeller to loosen from
tapered shaft and key. After removing impeller, the
seal retainer needs to be removed to expose seal.
CAUTION: The impeller is large and heavy and
will need to be supported.
4. If the lower seal needs removed, first remove
the compression spring that rides between the
impeller and the seal assembly. Next take a pair
of screwdrivers and remove the compression
ring that surrounds the rubber bellows on the
rotating portion of the seal assembly. Again
using the screwdrivers, pry the remaining portion
of the rotating seal assembly off the shaft. The
ceramic stationary can be removed by placing a
screwdriver between the rubber and the ceramic
face and then prying, working around the entire
diameter. Note, these parts should be discarded
and a new seal assembly installed.
5. If the oil in the seal chamber was drained, examine
the contents to determine if the upper seal has
been damaged. Signs of grit or other abrasive
material may indicate that the upper seal has also
been damaged. Pressurizing the motor housing
assembly between 7 and 10 psi and observing any
drop in pressure will indicate if the upper seal is
functioning properly.
Note: Upper seal repairs must be done at a Myers
Authorized Service Center or at the Myers factory.
Any unauthorized field repair voids warranty and
the hazardous location approval on the Factory
Mutual listed pump.
6. The wear ring can be removed from the volute for
repair or replacement. First remove the retaining
screws from the wear ring. With a soft mallet the
wear ring can be tapped out of the volute case.
REASSEMBLY:
1. Remove the ceramic portion of the new seal from
the package. Brush new dielectric oil around the
rubber portion of the stationary assembly and into

23833A470 02/26/13
5
the pocket in the seal housing. Note, keep the
oil off the seal face. Without scratching the seal
face, press the ceramic stationary portion into
the seal housing with a Myers seal pusher. With
clean cloth, lightly wipe the face of the seal surface
to make sure it is dirt free. Remove the rotating
portion of the seal from the package and lubricate
the inside diameter of the rubber bellows and the
outside diameter of the shaft. Place the seal over
the shaft (make sure the key is removed). Evenly
press on the body of the rotational assembly and
slide it down the shaft until the seal faces meet.
Once the seal assembly is in position, place the
spring over the register on the rotational portion of
the seal.
2. Before placing impeller on shaft, the seal spring
retainer should be placed on shaft with stepped
end toward seal spring. Position the key into the
seat in the shaft. Align the impeller onto the shaft,
making sure that the seal spring is registered
properly onto the back side of the impeller. Insert
the bolt and washer assembly into the shaft and
tighten to 193 ft.-lbs. Replace the nose cone
onto the impeller. The proper Loctite®should be
applied to the bolts. Install and tighten.
3. Fill the seal chamber with new dielectric oil.
An air gap of 10-15% volume must be left for
the expansion of the oil when it is at operating
temperature.
4. The wear ring can be aligned with the retaining
holes and tapped into place with a soft mallet.
The proper Loctite should be applied to the bolts.
Install and tighten.
5. The motor and impeller assembly can be installed
into the volute. Make sure that the impeller aligns
properly with the volute. Install the volute retaining
bolts and tighten.
6. Air tends to trap in the pump case when water
rises in the sump or when the pump is lowered into
the water after service. To vent off this air, a small
hole is drilled into the volute casting. Be sure
this vent hole is clean after any service work
on pump. Air venting is not a problem after initial
start.

23833A470 02/26/13 6
CHECK LIST IF PUMP DOES NOT OPERATE PROPERLY
Checking for Moisture in Motor: Use an
ohmmeter or a megger and set on highest scale.
Readings on the large power cord between any
of the conductors red, black or white to the green
conductor or to the motor housing should be
greater than 1,000,000 ohms (1 megohm). Service
work should be done only at an authorized service
station. Note, readings should be taken with line
leads disconnected from the control panel.
CONDITION
Red light comes on at control box.
Overload trips at control box and alarm buzzer or
ashing red light comes on due to high water level in
basin.
Yellow run light stays on continuously.
Circuit breaker trips.
PROBABLE CAUSE
This indicates some water has leaked past the lower seal
and has entered the seal chamber and made contact with
the electrode probe. Pump must be removed immediately
for replacement of lower seal. This preventive repair will
save an expensive motor.
1. Push in on red reset button to reset overload. If
overload trips again after short run, pump has some
damage and must be removed from basin for
checking.
2. Trouble may be from clogged impeller causing motor
to overload or could be from failed motor.
3. Trouble may be from faulty component in control box.
Always check control box before removing pump.
1. Indicates H-O-A switch may be in the Hand position.
2. Level control switch may have failed causing pump to
continue to operate when water is below lower control.
3. Impeller may be partially clogged causing pump to
operate at very reduced capacity.
4. Gate valve or check valve may be clogged causing low
pump flow.
5. Pump may be air locked.
1. Reset breaker by pushing completely down on handle
then back to On position. If breaker trips again in
few seconds it indicates excessive load probably
caused by a short in the motor or control box. Check
out instructions given with control box before pulling
pump.
2. If this condition happens after an electrical storm,
motor or control box may be damaged by lightning.
3. Resistance reading of the motor with lead wires
disconnected from the control box can determine if
trouble is in motor or control box.
Resistance of Windings: Every motor winding has
a fixed resistance. The windings must check close
to specification values. Verification of the proper
wiring of a dual voltage motor can also be checked
by measuring the motor winding resistance.

23833A470 02/26/13
7
CONDITION
Pump is noisy and pump rate is low.
Grease and solids have accumulated around pump
and will not pump out of basin.
PROBABLE CAUSE
1. Impeller may be partially clogged with some foreign
objects causing noise and overload on the motor.
2. Impeller may be rubbing on wear ring due to bent
shaft or misalignment.
3. Pump may be operating too close to shut-off. Check
head.
1. Lower control switch may be set too high.
2. Run pump on Hand operation for several minutes with
small amount of water running into basin to clean out
solids and grease. This allows pump to break suc-
tion and surge which will break up the solids. If level
switch is set properly, this condition generally will not
occur.
3. Trash and grease may have accumulated around floats
causing pump to operate erratically.
CAP SCREW TORQUE VALUE
3/8-16 20 ft.-lbs.
1/2-13 43 ft.-lbs.
5/8-11 93 ft.-lbs.
3/4-10 128 ft.-lbs.
7/8-14 193 ft.-lbs.
1 7 2 8 3 9 4 5 6 17
28
394
5
6
123
POTTING
RESIN
CONTROL
CORD
TERMINAL
POSTS
POWER
CORD
ELECTRODE
HEAT SENSOR
ON STATOR
GROUND
SCREW
RED
RED
WHITE
BLACK
BLACK
BLACK
RED
WHITE
GREEN
GREEN
PROBE TEST RESISTOR
ON HAZARDOUS LOCATION ONLY
STATOR
AB
00
230 VOLT - THREE PHASE
1
7
2
6
5
4
8
3
9
POTTING
RESIN
CONTROL
CORD
TERMINAL
POSTS
POWER
CORD
ELECTRODE
HEAT SENSOR
ON STAT OR
GROUND
SCREW
RED
RED
WHITE
BLACK
BLACK
BLACK
RED
WHITE
GREEN
GREEN
PROBE TEST RESISTOR
ON HAZARDOUS LOCATION ONLY
STATOR
AB
00
460 VOLT - THREE PHASE
1
2
3
7
4
8
4
9
5
BLACK
BLACK
POTTING
RESIN
CONTROL
CORD
TERMINAL
POSTS
POWER
CORD
ELECTRODE
HEAT SENSOR
ON STATOR
GROUND
SCREW
RED
RED
WHITE
BLACK
BLACK
BLACK
RED
WHITE
GREEN
GREEN
PROBE TEST RESISTOR
ON HAZARDOUS LOCATION ONLY
STATOR
AB
00
200 or 575 VOLT - THREE PHASE
1
2
3
BLACK
BLACK
WIRING DIAGRAMS

23833A470 02/26/13 8
4VL/4VLX AND 8SM/8SMX PUMPS
14
11
12
13
9
10
15
16
17
18
19
20
21
22
23
24
25
27
30
3133
34
40
29
32
35
36
39
38
37
44
43
47
46
45
26
42
41
28
1
2
3
45
6
7
8

23833A470 02/26/13
9
Ref. Description Qty.
Part Numbers
4VL/4VLX 8SM/8SMX
1 CORD CAP COMPLETE 1 Refer To
Factory
Refer To
Factory
2 CAP SCREW, HEX HD., 1/4- x 5/8" 1 19099A029 19099A029
3 LOCK NUT, 1/4-20 23 11904A005 11904A005
4 TERMINAL, ELECTRICAL 13 23555AOOO 23555A000
5MACHINE SCREW, SOCKET FLAT HD.,
5/16-18 x 1" 4 07597A017 07597A017
6 O-RING, 12-1/4 x 12 x 1/8 1 05876A178 05876A178
7PLATE, TERMINAL 1 25257D000 25257D000
8TERMINAL, RING TONGUE, 1/4 STUD,
16-14 WIRE 2 12074A038 12074A038
9WASHER, SPRING WAVE 1 19331A009 19331A009
10 BEARING, BALL, UPPER 1 08565A026 08565A026
11 WIRE GUARD 1 25453B000 25453B000
12 LOCKWASHER, SHAKEPROOF,
INTERNAL, NO. 10 4 06107A015 06107A015
13 MACHINE SCREW, HEX WASH. HD.
#10-24 x 5/8" 4 18475A006 18475A006
14 RING, STATOR SPACER 1 See Chart See Chart
15 HOUSING, MOTOR 1 25258F000 25258F000
16 STATOR 1 See Chart See Chart
17 ROTOR WITH SHAFT
- SHAFT ONLY (FOR ALL H.P. UNITS)
1
1
See Chart
26891D000
See Chart
26891D000
18 RETAINER, MOTOR 4 25259D000 25259D000
19 CAP SCREW, SOCKET HD.,
5/16-18 x 1-1/2" 8 06106A016 06106A016
20 BEARING, ANGULAR BALL 1 25833A004 25833A004
21 CAP SCREW, HEX HD., 1/2-13 x 2-1/2" 12 19103A048 19103A048
22 O-RING, 16-7/8 x 16-1/2 x 3/16 1 05876A180 05876A180
23 HOUSING, SEAL 1 25264F000 25264F000
24 SEAL 3" SHAFT 2 25449A000 25449A000
25 RING, RETAINING 1 12558A031 12558A031
26 PLUG, 3/8" NPT PIPE 3 05022A062 05022A062
27 SEAL, LABYRINTH, 4VL / 8SM 1 25262C011 25262C011
SEAL, LABYRINTH, 4VLX / 8SMX 1 25262C010 25262C010
28
CAP SCREW, HEX HD., 1/2-13 x 2-1/4"
4VL
8SM
16
24
19103A049
19103A049
19103A049
19103A049
29 CASE, VOLUTE 1 27040F000 26898F000
30 CAP SCREW, HEX. HD., 1/2-13 x 2" 8 19103A047 –
31 MACHINE SCREW, FLAT HD.,
7/16-20 x 1" 6 07597A034 07597A034
32 IMPELLER – SPECIFY 0.D. 1 See Chart See Chart
33 O-RING, 7-1/2 x 7-1/4 x 1/8" 1 05876A127 05876A127
34 PLATE, SEAL 1 25261D000 25261D000
35 WASHER, IMPELLER RETAINER 1 1945-001-3 1945-001-3
36 CAP SCREW, SOCKET HD. 1 3879-002-1 3879-002-1
37 KEY, SQUARE 1 05818A071 05818010
38 RING, WEAR 1 13695-000-3 13535-000-3
39 SCREW, SOCKET HD. 4 829-009-1 4756-002-1
40 RING, CLAMP 1 – 05818A050
41 O-RING, 13-1/4 x 13 x 1/8" 1 05876A179 05876A179
42 TERMINAL, RING TONGUE 9
3 (575V) 12074A037 12074A037
43 LOCKWASHER, SHAKEPROOF,
INTERNAL, NO. 6 2 06107A010 06107A010
44 ELECTRODE, WATER SENSOR 2 25455A000 25455A000
45 KEY, SQUARE, 1/4 x 1/4 x 1-1/4" 1 05818A050 05818A050
46 WIRE WITH TERMINAL, SEAL SENSOR 2 09859A821 09859A821
47 RESISTOR (FOR 4VLX & 8SMX ONLY) 1 22912A000 22912A000
Pump Catalog Numbers (17) Rotor
w/Shaft
(16) Stator
Only
4VL750M4-43 4VLX750M4-43 26892D000 25444D215
4VL750M4-53 4VLX750M4-53 26892D000 25444D216
4VL1000M4-43 4VLX1000M4-43 26892D000 25444D210
4VL1000M4-53 4VLX1000M4-53 26892D000 25444D211
4VL1250M4-43 4VLX1250M4-43 26892D000 25444D210
4VL1250M4-53 4VLX1250M4-53 26892D000 25444D211
8SM750M4-43 8SMX750M4-43 26892D000 25444D215
8SM750M4-53 8SMX750M4-53 26892D000 25444D216
8SM1000M4-43 8SMX1000M4-43 26892D000 25444D210
8SM1000M4-53 8SMX1000M4-53 26892D000 25444D211
8SM1250M4-43 8SMX1250M4-43 26892D000 25444D210
8SM1250M4-53 8SMX1250M4-53 26892D000 25444D211
IMPELLER TRIMS FOR 4VL SERIES
Engineering Number Description
13532-101-2 IMPELLER; 15" 0.D., 2 VANE
13532-103-2 IMPELLER; 14.5" 0.D., 2 VANE
13532-105-2 IMPELLER; 14" 0.D., 2 VANE
13532-107-2 IMPELLER; 13.5" O.D., 2 VANE
13532-109-2 IMPELLER; 13" 0.D., 2 VANE
13532-111-2 IMPELLER; 12.5" 0.D., 2 VANE
13532-113-2 IMPELLER; 12" 0.D., 2 VANE
IMPELLER TRIMS FOR 8SM SERIES
Engineering Number Description
13532-001-2 IMPELLER; 14" 0.D., 2 VANE
13532-003-2 IMPELLER; 13.5" 0.D., 2 VANE
13532-005-2 IMPELLER; 13" 0.D., 2 VANE
13532-008-2 IMPELLER; 14.5" 0.D., 2 VANE
13532-009-2 IMPELLER; 15" 0.D., 2 VANE
4VL, 8SM

23833A470 02/26/13 10
37
52
51
50
49
45
46
1
2
3
4
5
6
7
9
8
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
32
31
33
34
35
36
40
39
38
41
42
43
44
47
48
53
8VL/8VLX AND 12VL/12VLX PUMPS

23833A470 02/26/13
11
Ref. Description Qty. 8VL/8VLX 12VL/12VLX
1 CORD CAP COMPLETE 7 Refer To Factory Refer To Factory
2 CAP SCREW, HEX HD., 1/4" x 5/8" 1 19099A029 19099A029
3PROTECTOR, THREAD 13 17272A021 17272A021
4 LOCK NUT, 1/4-20 23 11904A005 11904A005
5 TERMINAL, ELECTRICAL 13 23555A000 23555A000
6 MACHINE SCREW, SOCKET FLAT HD., 5/16-18 x 1" 4 07597A017 07597A017
7 O-RING, 12-1/4 x 12 x 1/8 1 05876A178 05876A178
8PLATE, TERMINAL 1 25257D000 25257D000
9 TERMINAL RING TONGUE, 1/4 STUD, 16-14 WIRE 2 12074A038 12074A038
10 WASHER, SPRING WAVE 1 19331A009 19331A009
11 BEARING, BALL, UPPER 1 08565A026 08565A026
12 WIRE GUARD 1 25453B000 25453B000
13 LOCKWASHER, SHAKEPROOF, INTERNAL, NO. 10 4 06107A015 06107A015
14 MACHINE SCREW, HEX WASH, HD. #10-24 x 5/8" 4 18475A006 18475A006
15 RING, STATOR SPACER 1 See Chart See Chart
16 HOUSING, MOTOR 1 25258F000 25258F000
17 STATOR 1 See Chart See Chart
18 ROTOR WITH SHAFT 1 See Chart See Chart
SHAFT ONLY (FOR ALL H.P. UNITS) 1 25446D000 25446D000
19 RETAINER, MOTOR 4 25259D000 25259D000
20 CAP SCREW, SOCKET HD., 5/16-18 x 1-1/2" 8 06106A016 06106A016
21 BEARING, ANGULAR BALL 1 25833A004 25833A004
22 CAP SCREW, HEX HD., 1/2-13 x 2-1/2" 12 19103A048 19103A048
23 O-RING, 16-7/8 x 16-1/2 x 3/16" 1 05876A180 05876A180
24 HOUSING, SEAL 1 25264F000 25264F000
25 SEAL, 3" SHAFT 2 25449A000 25449A000
26 RING, RETAINING 1 12558A031 12558A031
27 PLUG, 3/8" NPT PIPE 3 05022A062 05022A062
28 SEAL, LABYRINTH 1 25262C000 25262C000
29 CAP SCREW, HEX HD., 1/2-13 x 2-1/4" 24 19103A049 19103A049
30 CASE, VOLUTE 1 25254F000 25457F000
31 MACHINE SCREW, FLAT HD., 7/16-20 x 1" 6 07597A034 07597A034
32 IMPELLER – SPECIFY O.D. 1 25252D500 254546E500
33 O-RING, 7-1/2 x 7-1/4 x 1/8" 1 05876A127 05876A127
34 PLATE, SEAL 1 25261D000 25261D000
35 WASHER, IMPELLER RETAINER 1 25463A000 25463A000
36 CAP SCREW, SOCKET HD., 1/4-28 3 06106A043 06106A044
37 LEG, SUPPORT, DISCHARGE 1 - 25469D001
38 CAP SCREW, HEX HD., 7/8-14 x 2" 1 19107A004 19107A004
39 CONE, IMPELLER NOSE 1 26015B030 26016B030
40 KEY, SQUARE 1 05818A071 05818A010
41 RING, WEAR 1 25260D000 25458D000
42 SCREW, SOCKET HD. 6 (8VL)
4 (12VL) 06106A039 06106A045
43 INLET, BELL 1 - 25459E000
44 CAP SCREW, HEX HD., 3/4-10 x 1-3/4" 8 - 19106A017
45 O-RING, 13-1/3 x 13 x 1/8" 1 05876A179 05876A179
46 TERMINAL, RING TONGUE 9
3 (575V) 12074A037 12074A037
47 CAP SCREW, HEX HD., 1/2-13 x 1-1/4" 12 - 19103A052
48 LEG, SUPPORT 2 - 25469D000
49 KEY, SQUARE, 1/4 x 1/4 x 1-1/4" 1 05818A050 05818A050
50 WIRE WITH TERMINAL, SEAL SENSOR 2 09859A821 09859A821
51 RESISTOR (FOR 8VLX & 12 VLX ONLY) 1 22912A000 22912A000
52 LOCKWASHER, SHAKEPROOF, INTERNAL, NO. 6 2 06107A010 06107A010
53 ELECTRODE, WATER SENSOR 2 25455A000 25455A000
- STUD, 7/8-9 x 4-1/4" (NOT SHOWN, LOWER VOLUTE) 3 05659A121 -
- WASHER, 1-3/4 x 29/32 x 1/8 (NOT SHOWN) 3 05030A245 -
- HEX NUT, 7/8-9 (NOT SHOWN) 3 19109A090 -
MODEL SPECIFIC PARTS LIST

23833A470 02/26/13 12
8VL/ 8VLX/ 12VL/ 12VLX
8VL/8VLX 12VL/12VLX 18 ROTOR W/SHAFT 17 STATOR ONLY 15 RING, STATOR SPACER
8VL150M8-03 8VLX150M8-03 25447D000 25444D000 25465D003
8VL150M8-23 8VLX150M8-23 25447D000 25444D000 25465D003
8VL150M8-43 8VLX150M8-43 25447D000 25444D000 25465D003
8VL150M8-53 8VLX150M8-53 25447D000 25444D001 25465D003
8VL200M8-03 8VLX200M8-03 25447D002 25444D002 25465D001
8VL200M8-23 8VLX200M8-23 25447D000 25444D000 25465D003
8VL200M8-43 8VLX200M8-43 25447D000 25444D000 25465D003
8VL200M8-53 8VLX200M8-53 25447D000 25444D001 25465D003
8VL250M8-03 8VLX250M8-03 25447D002 25444D002 25465D001
8VL250M8-23 8VLX250M8-23 25447D002 25444D002 25465D001
8VL250M8-43 8VLX250M8-43 25447D002 25444D002 25465D001
8VL250M8-53 8VLX250M8-53 25447D002 25444D002 25465D001
8VL300M6-23 8VLX300M6-23 25447D006 25444D004 25465D002
8VL300M6-43 8VLX300M6-43 25447D006 25444D004 25465D002
8VL300M6-53 8VLX300M6-53 25447D006 25444D005 25465D002
8VL400M6-23 8VLX400M6-23 25447D006 25444D006 25465D002
8VL400M6-43 8VLX400M6-43 25447D006 25444D006 25465D002
8VL400M6-53 8VLX400M6-53 25447D006 25444D007 25465D002
8VL500M6-23 8VLX500M6-23 25447D007 25444D012 25465D000
8VL500M6-43 8VLX500M6-43 25447D007 25444D013 25465D000
8VL500M6-53 8VLX500M6-53 25447D007 25444D014 25465D000
8VL600M6-43 8VLX600M6-43 25447D008 25444D008 -
8VL600M6-53 8VLX600M6-53 25447D008 25444D009 -
8VL750M4-43 8VLX750M4-43 25447D010 25444D015 -
8VL750M4-53 8VLX750M4-53 25447D010 25444D016 -
8VL1000M4-43 8VLX1000M4-43 25447D010 25444D010 -
8VL1000M4-53 8VLX1000M4-53 25447D010 25444D011 -
8VL1250M4-43 8VLX1250M4-43 25447D010 25444D010 -
8VL1250M4-53 8VLX1250M4-53 25447D010 25444D011 -
12VL150M8-03 12VLX150M8-03 25447D000 25444D000 25465D003
12VL150M8-23 12VLX150M8-23 25447D000 25444D000 25465D003
12VL150M8-43 12VLX150M4-43 25447D000 25444D000 25465D003
12VL150M8-53 12VLX150M4-53 25447D000 25444D001 25465D003
12VL200M8-03 12VLX200M4-03 25447D002 25444D002 25465D001
12VL200M8-23 12VLX200M4-23 25447D000 25444D000 25465D003
12VL200M8-43 12VLX200M4-43 25447D000 25444D000 25465D003
12VL200M8-53 12VLX200M4-53 25447D000 25444D001 25465D003
12VL250M8-03 12VLX250M4-03 25447D002 25444D002 25465D001
12VL250M8-23 12VLX250M4-23 25447D002 25444D002 25465D001
12VL250M8-43 12VLX250M4-43 25447D002 25444D002 25465D001
12VL250M8-53 12VLX250M4-53 25447D002 25444D003 25465D001
12VL300M8-23 12VLX300M4-23 25447D002 25444D002 25465D001
12VL300M8-43 12VLX300M4-43 25447D002 25444D002 25465D001
12VL300M8-53 12VLX300M4-53 25447D002 25444D003 25465D001
12VL400M6-23 12VLX400M6-23 25447D006 25444D006 25465D002
12VL400M6-43 12VLX400M6-43 25447D006 25444D006 25465D002
12VL400M6-53 12VLX400M6-53 25447D006 25444D007 25465D002
12VL500M6-23 12VLX500M6-23 25447D007 25444D012 25465D000
12VL500M6-43 12VLX500M6-43 25447D007 25444D013 25465D000
12VL500M6-53 12VLX500M6-53 25447D007 25444D014 25465D000
12VL600M6-43 12VLX600M6-43 25447D008 25444D008 -
12VL600M6-53 12VLX600M6-53 25447D008 25444D009 -
12VL750M6-43 12VLX750M6-43 25447D008 25444D017 -
12VL750M6-43 12VLX750M6-43 25447D008 25444D018 -

23833A470 02/26/13
13
DIMENSIONS
PERFORMANCE CURVE
Capacity Liters Per Minute
Flow Per Minute
Total Head
M F
60
50
40
30
20
10
200
180
160
140
120
100
80
60
40
20
0500 1000 1500 2000 2500 3000 3500 4000
1600 3200 4800 6400 8000 9600 11200 12800 14400
Gals.
Liters
1750 RPM
1150 RPM
870 RPM
1150 RPM
870 RPM
Total Head in Feet
Gallons Per Minute
1000 2000 3000 4000 5000 6000 7000 8000 9000
100
90
80
70
60
50
40
30
20
10
0
PERFORMANCE CURVE
DIMENSIONS DIMENSIONS
14
1
/ 4 "
11
1
/ 2 "
13" 19
3
/ 4 "
13
1
/
2
" Dia.
8" Std.
Flange
16"
11
1
/ 8 "
13
9
/
16
"23"
19" Dia.
12" Std.
Flange
47
1
/ 2 "
7
1
/
2
"7
7
/ 8 "
58
1
/
2
"
50
1
/ 4 "
9" 8
3
/
8
"
PERFORMANCE CURVE
Capacity Liters Per Minute
Flow Per Minute
Total Head
M F
60
50
40
30
20
10
200
180
160
140
120
100
80
60
40
20
0500 1000 1500 2000 2500 3000 3500 4000
1600 3200 4800 6400 8000 9600 11200 12800 14400
Gals.
Liters
1750 RPM
1150 RPM
870 RPM
1150 RPM
870 RPM
Total Head in Feet
Gallons Per Minute
1000 2000 3000 4000 5000 6000 7000 8000 9000
100
90
80
70
60
50
40
30
20
10
0
PERFORMANCE CURVE
DIMENSIONS DIMENSIONS
14
1
/ 4 "
11
1
/
2
"
13" 19
3
/ 4 "
13
1
/ 2 " Dia.
8" Std.
Flange
16"
11
1
/ 8 "
13
9
/ 16 "23"
19" Dia.
12" Std.
Flange
47
1
/ 2 "
7
1
/ 2 "7
7
/ 8 "
58
1
/ 2 "
50
1
/ 4 "
9" 8
3
/ 8 "
PERFORMANCE CURVE
Capacity Liters Per Minute
Flow Per Minute
Total Head
M F
60
50
40
30
20
10
200
180
160
140
120
100
80
60
40
20
0500 1000 1500 2000 2500 3000 3500 4000
1600 3200 4800 6400 8000 9600 11200 12800 14400
Gals.
Liters
1750 RPM
1150 RPM
870 RPM
1150 RPM
870 RPM
Total Head in Feet
Gallons Per Minute
1000 2000 3000 4000 5000 6000 7000 8000 9000
100
90
80
70
60
50
40
30
20
10
0
PERFORMANCE CURVE
DIMENSIONS DIMENSIONS
14
1
/ 4 "
11
1
/ 2 "
13" 19
3
/ 4 "
13
1
/ 2 " Dia.
8" Std.
Flange
16"
11
1
/ 8 "
13
9
/ 16 "23"
19" Dia.
12" Std.
Flange
47
1
/
2
"
7
1
/ 2 "7
7
/ 8 "
58
1
/ 2 "
50
1
/ 4 "
9" 8
3
/ 8 "
PERFORMANCE CURVE
Capacity Liters Per Minute
Flow Per Minute
Total Head
M F
60
50
40
30
20
10
200
180
160
140
120
100
80
60
40
20
0500 1000 1500 2000 2500 3000 3500 4000
1600 3200 4800 6400 8000 9600 11200 12800 14400
Gals.
Liters
1750 RPM
1150 RPM
870 RPM
1150 RPM
870 RPM
Total Head in Feet
Gallons Per Minute
1000 2000 3000 4000 5000 6000 7000 8000 9000
100
90
80
70
60
50
40
30
20
10
0
PERFORMANCE CURVE
DIMENSIONS DIMENSIONS
14
1
/
4
"
11
1
/ 2 "
13" 19
3
/ 4 "
13
1
/ 2 " Dia.
8" Std.
Flange
16"
11
1
/ 8 "
13
9
/ 16 "23"
19" Dia.
12" Std.
Flange
47
1
/ 2 "
7
1
/ 2 "7
7
/
8
"
58
1
/ 2 "
50
1
/ 4 "
9" 8
3
/ 8 "
8VL
(8" Submersible
Solids Handling
Wastewater Pump)
12VL
(12" Submersible
Solids Handling
Wastewater Pump)
447⁄8"
[1140]
51⁄8"
[130]
33⁄4"
[95]
9"
[229]
1125⁄32"
[299]
1025⁄32"
[274]
119⁄32"
[286]
151⁄2"
[394]
4" Std.
Flange
1313⁄32"
[341]
1117⁄32"
[293]
1215⁄32"
[317]
19"
[483]
8" Std.
Flange
131⁄2"
[343]
31⁄4"
[83]
81⁄4"
[210]
481⁄4"
[1225]
4VL/4VLX 8SM/8SMX

THIS PAGE INTENTIONALLY LEFT BLANK

THIS PAGE INTENTIONALLY LEFT BLANK

Warranty Rev. 12/13
STANDARD LIMITED WARRANTY
Pentair Myers® warrants its products against defects in material and workmanship for a period of 12 months from the
date of shipment from Pentair Myers or 18 months from the manufacturing date, whichever occurs first – provided
that such products are used in compliance with the requirements of the Pentair Myers catalog and technical manuals
for use in pumping raw sewage, municipal wastewater or similar, abrasive-free, noncorrosive liquids.
During the warranty period and subject to the conditions set forth, Pentair Myers, at its discretion, will repair or
replace to the original user, the parts that prove defective in materials and workmanship. Pentair Myers reserves the
right to change or improve its products or any portions thereof without being obligated to provide such a change or
improvement for prior sold and/or shipped units.
Start-up reports and electrical schematics may be required to support warranty claims. Submit at the time of start-
up through the Pentair Myers website: http://forms.pentairliterature.com/startupform/startupform.asp?type=m.
Warranty is effective only if Pentair Myers authorized control panels are used. All seal fail and heat sensing devices
must be hooked up, functional and monitored or this warranty will be void. Pentair Myers will cover only the lower
seal and labor thereof for all dual seal pumps. Under no circumstance will Pentair Myers be responsible for the cost
of field labor, travel expenses, rented equipment, removal/reinstallation costs or freight expenses to and from the
factory or an authorized Pentair Myers service facility.
This limited warranty will not apply: (a) to defects or malfunctions resulting from failure to properly install, operate or
maintain the unit in accordance with the printed instructions provided; (b) to failures resulting from abuse, accident
or negligence; (c) to normal maintenance services and parts used in connection with such service; (d) to units that
are not installed in accordance with applicable local codes, ordinances and good trade practices; (e) if the unit is
moved from its original installation location; (f) if unit is used for purposes other than for what it is designed and
manufactured; (g) to any unit that has been repaired or altered by anyone other than Pentair Myers or an authorized
Pentair Myers service provider; (h) to any unit that has been repaired using non factory specified/OEM parts.
Warranty Exclusions: PENTAIR MYERS MAKES NO EXPRESS OR IMPLIED WARRANTIES THAT EXTEND BEYOND
THE DESCRIPTION ON THE FACE HEREOF. PENTAIR MYERS SPECIFICALLY DISCLAIMS THE IMPLIED WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR ANY PARTICULAR PURPOSE.
Liability Limitation: IN NO EVENT SHALL PENTAIR MYERS BE LIABLE OR RESPONSIBLE FOR CONSEQUENTIAL,
INCIDENTAL OR SPECIAL DAMAGES RESULTING FROM OR RELATED IN ANY MANNER TO ANY PENTAIR MYERS
PRODUCT OR PARTS THEREOF. PERSONAL INJURY AND/OR PROPERTY DAMAGE MAY RESULT FROM IMPROPER
INSTALLATION. PENTAIR MYERS DISCLAIMS ALL LIABILITY, INCLUDING LIABILITY UNDER THIS WARRANTY, FOR
IMPROPER INSTALLATION. PENTAIR MYERS RECOMMENDS INSTALLATION BY PROFESSIONALS.
Some states do not permit some or all of the above warranty limitations or the exclusion or limitation of incidental or
consequential damages and therefore such limitations may not apply to you. No warranties or representations at any
time made by any representatives of Pentair Myers shall vary or expand the provision hereof.
1101 MYERS PARKWAY 490 PINEBUSH ROAD, UNIT 4
ASHLAND, OHIO 44805 CAMBRIDGE, ONTARIO, CANADA N1T 0A5
PH: 855-274-8947 PH: 800-363-7867
WWW.FEMYERS.COM WWW.FEMYERS.COM