Pentair Myers MVPH-100 User manual

OWNER’S MANUAL
Multi-Stage Deep Well Jet Pumps
© 2013 Pentair, Ltd. All Rights Reserved. MY757 (Rev. 02/05/13)
293 WRIGHT STREET, DELAVAN, WI 53115 WWW.FEMYERS.COM
PH: 888-987-8677
368 1293ASB NF
20 100
80
60
40
MVPH-100 1 HP
MVPH-150 1-1/2 HP
MVPH-200 2 HP
Installation/Operation/Parts
For further operating, installation, or maintenance assistance:
Call 1-888-987-8677

Safety 2
READ AND FOLLOW
SAFETY INSTRUCTIONS!
This is the safety alert symbol. When you see this
symbol on your pump or in this manual, look for one of
the following signal words and be alert to the potential
for personal injury:
warns about hazards that will cause serious
personal injury, death or major property damage if
ignored.
warns about hazards that can cause serious
personal injury, death or major property damage if
ignored.
warns about hazards that will or can cause
minor personal injury or property damage if ignored.
The label NOTICE indicates special instructions which
are important but not related to hazards.
Carefully read and follow all safety instructions in this
manual and on pump.
Keep safety labels in good condition.
Replace missing or damaged safety labels.
Make workshops childproof; use padlocks and master
switches; remove starter keys.
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.
ELECTRICAL SAFETY
Capacitor voltage may be hazardous.
To discharge motor capacitor, hold insulated handle
screwdriver BY THE HANDLE and short capacitor
terminals together. Do not touch metal screwdriver
blade or capacitor terminals. If in doubt, consult a
qualified electrician.
GENERAL SAFETY
Do not touch an operating motor. Modern
motors are designed to operate at high temperatures. To
avoid burns when servicing pump, allow it to cool for 20
minutes after shut-down before handling.
Do not allow pump or any system component to freeze.
Freezing may damage system, leading to injury or
flooding. Allowing pump or system components to freeze
will void warranty.
Relief valve must be capable of passing full pump flow at
75 PSI.
Pump water only with this pump.
Periodically inspect pump and system components.
Wear safety glasses at all times when working on pumps.
Keep work area clean, uncluttered and properly lighted;
store properly all unused tools and equipment.
Keep visitors at a safe distance from the work areas.
WARNING
Hazardous pressure!
Install pressure relief
valve in discharge pipe.
Release all pressure on
system before working on
any component.
WARNING
Hazardous voltage.
Can shock, burn, or
cause death.
Ground pump before
connecting to power
supply. Disconnect power
before working on pump,
motor or tank.
Wire motor for correct
voltage. See
“Electrical” section of
this manual and motor
nameplate.
Ground motor before
connecting to power
supply.
Meet National
Electrical Code,
Canadian Electrical
Code, and local codes
for all wiring.
Follow wiring
instructions in this
manual when
connecting motor to
power lines.

Table of Contents 3
Page
General Safety .....................................................................................................2
Warranty..............................................................................................................3
Installation........................................................................................................4-7
Electrical...........................................................................................................8-9
Operation .....................................................................................................10-11
Maintenance.................................................................................................12-13
Troubleshooting.................................................................................................14
Repair Parts .................................................................................................15-16
Limited Warranty
F.E. MYERS warrants to the original consumer purchaser (“Purchaser” or “You”) of the products listed below, that they will be free
from defects in material and workmanship for the Warranty Period shown below.
Product Warranty Period
Jet pumps, small centrifugal pumps, submersible pumps and relatedaccessories
whichever occurs first:
12 months from date of original installation,
or 18 months from date of manufacture
Fibrewound Tanks 5 years from date of original installation
Steel Pressure Tanks 5 years from date of original installation
Sump/Sewage/Effluent Products 12 months from date of original installation,
or 24 months from date of manufacture
Our warranty will not apply to any product that, in our sole judgement, has been subject to negligence, misapplication, improper
installation, or improper maintenance. Without limiting the foregoing, operating a three phase motor with single phase power
through a phase converter will void the warranty. Note also that three phase motors must be protected by three-leg, ambient
compensated, extra-quick trip overload relays of the recommended size or the warranty is void.
Your only remedy, and F.E. MYERS’s only duty, is that F.E. MYERS repair or replace defective products (at F.E. MYERS’s choice). You
must pay all labor and shipping charges associated with this warranty and must request warranty service through the installing
dealer as soon as a problem is discovered. No request for service will be accepted if received after the Warranty Period has
expired. This warranty is not transferable.
F.E. MYERS SHALL NOT BE LIABLE FOR ANY CONSEQUENTIAL, INCIDENTAL, OR CONTINGENT DAMAGES WHATSOEVER.
THE FOREGOING LIMITED WARRANTIES ARE EXCLUSIVE AND IN LIEU OF ALL OTHER EXPRESS AND IMPLIED WARRANTIES,
INCLUDING BUT NOT LIMITED TO IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE. THE FOREGOING LIMITED WARRANTIES SHALL NOT EXTEND BEYOND THE DURATION PROVIDED HEREIN.
Some states do not allow the exclusion or limitation of incidental or consequential damages or limitations on the duration of an
implied warranty, so the above limitations or exclusions may not apply to You. This warranty gives You specific legal rights and You
may also have other rights which vary from state to state.
This Limited Warranty is effective June 1, 2011 and replaces all undated warranties and warranties dated before June 1, 2011.
F.E. MYERS
293 Wright Street, Delavan, WI 53115
Phone: [phone] • Fax: [phone] • www.femyers.com
In Canada: P. O. Box 9138, 269 Trillium Dr., Kitchener, Ontario N2G 4W5
Phone: [phone] • Fax: [phone]

1096 0697
Pump
Body
From
Well
Dirt and Scale Plug Pump and Pipes!
Use New Pipe for Best Results.
Clean Flow!
1100 0697
No Sags
Sags Allow Air Pockets
If Air Pockets Form, Water Won’t Flow.
Keep Pipe Straight and Angled up to Pump.
1101 0697
Figure 1: No Dirt or Scale in Suction
Pipe
Figure 2: Foot Valve Must Work Freely
Figure 3: No Air Pockets in Suction
Pipe
Installation 4
Figure 4: Suction Pipe Must Not Leak
BEFORE YOU INSTALL YOUR PUMP
NOTE: For proper performance, pump MUST be matched to ejector and
to well depth. Use shallow well installation for wells up to 25 ft depth to
water and deep well ejector for depths up to 130 ft.
Step 1. Long runs and many fittings increase friction and reduce flow.
Locate pump as close to well as possible: use as few elbows and
fittings as possible.
Step 2. Be sure well is clear of sand. Sand will plug the pump and void the
warranty.
Step 3. Protect pump and all piping from freezing. Freezing will split
pipe, damage pump and void the warranty. Check locally for frost
protection requirements (usually pipe must by 12” below frost line
and pump must be insulated).
Step 4. Be sure all pipes and foot valve are clean and in good shape.
Step 5. No air pockets in suction pipe.
Step 6. No leaks in suction pipe. Use PTFE pipe thread sealant tape to seal
pipe joints.
Step 7. Match pump to well.
IMPORTANT: Flow into well must at least equal flow out through
pump!
Step 8. Unions installed near pump and well will aid in servicing. Leave
room to use wrenches.
Step 9. Plug 1” drive port when installing on shallow well.
SHALLOW WELL/CENTRIFUGAL INSTALLATION
No ejector is used in this case, plug the smaller of the two inlet ports,
using the larger for the suction pipe. Refer to Figure 6 for installation tips.
Maximum depth to water for shallow well/centrifugal operation is 25 feet.
NOTE: To avoid pump overloading and motor failure, install a flow control
valve at the discharge to limit flow to 20 gallons per minute.
1102 0697
No Air Leaks
in Suction Pipe.
Pipe Joint
Compound Will
Damage Plastic.
If Air Flows
Water Won’t
Use PTFE Tape
Be sure
entire
well
point is
below
water.
Drive
Coupling
Drive
Point
Check
Valve
1" NPT
Plug
Well
Casing
1" NPT
Plug
Well
Casing
Foot
Valve &
Strainer
Foot
Valve &
Strainer
Shallow well is less
than 25' (7.6M)
to water with
pump running.
Deep well is more
than 25' (7.6M)
to water with
pump running.
822 0697
Figure 5: Double Pipe Deep Well Figure 6: Cased Shallow Well
and Drive Point Shallow Well
Be sure
entire
well
point is
below
water.
Drive
Coupling
Drive
Point
Check
Valve
1" NPT
Plug
Well
Casing
1" NPT
Plug
Well
Casing
Foot
Valve &
Strainer
Foot
Valve &
Strainer
Shallow well is less
than 25' (7.6M)
to water with
pump running.
Deep well is more
than 25' (7.6M)
to water with
pump running.
822 0697

Installation 5
PIPING IN THE DEEP WELL
See Figures 7 and 8.
NOTE: Deep well installations are either single pipe (2” wells) or double
pipe (4” and larger wells). In a double pipe installation, the larger pipe is
the suction pipe and the smaller pipe is the drive pipe (very deep wells
may use suction and drive pipes of the same diameter).
Plastic pipe is ideal for double pipe installations. Due to its light weight,
it is easy to handle and does not usually require a block and tackle for
installation and removal.
PLASTIC PIPE INSTALLATION – DOUBLE PIPE
NOTE: Use PTFE pipe thread sealant tape on all male threads on plastic
pipe and fittings to prevent air leaks in suction piping.
Step 1. Inspect ejector to make sure that nozzle and venturi openings are
clean and clear.
Step 2. Inspect pipe for any foreign matter or obstructions.
IMPORTANT: Make sure that no foreign matter enters pipe
openings while installing pump.
Step 3. Make sure foot valve operates freely: attach to ejector with a close
nipple. Use PTFE pipe thread sealant tape on male threads.
Step 4. Install nozzle and venturi in deep well ejector.
Step 5. Using PTFE pipe thread sealant tape on male threads, install
special plastic pipe adapter (supplied with ejector) by screwing
adapter into 1-1/4” tapped hole in ejector body (see Figure 7A).
Step 6. Thread a 1” plastic pipe adapter into the 1” tapped hole in ejector
body (see Figure 7A).
Step 7. Install sufficient plastic pipe in well casing to place ejector at the
proper depth. (Your well driller should supply this information.)
IMPORTANT: as a guide, the ejector should be set at least 10
to 20 feet below the lowest water level with pump running, if
possible, but always at least five feet from the bottom of the well.
Step 8. Tighten all hose clamps securely on plastic pipe. Use two clamps
per joint to prevent air leaks into suction pipe. Clamp screws
should be on opposite sides of the pipe. Fill pipes with water to
make sure that foot valve and connections do not leak.
Step 9. Install sanitary well seal on top of well casing; use steel nipple
through well seal as shown in Figure 7A.
IMPORTANT: align locating lugs on adapter flange and pump
base so that pump discharge will be aligned with piping.
Step 10. Install 1” nipple in one side of adapter flange. Slide threadless
coupling down over drive pipe from well. Thread adapter flange
onto suction pipe from well and align nipple and drive pipe.
Step 11. Slide threadless coupling up and secure nipple to drive pipe.
Step 12. Remove paper backing from adhesive gasket. Apply gasket to
adapter flange, making sure that holes line up.
Step 13. Align locating lugs on pump base with locating lugs on adapter
flange; attach pump to flange with cap screws provided.
Step 14. See “Discharge Pipe Sizes” for information regarding correct
discharge pipe size.
Figure 7
Pump
Pump
Gasket
Gasket
Adapter Flange
Adapter Flange
Threadless
Coupling
Sanitary
Well Seal
Steel Pipe Nipple
Coupling
1" Plastic Drive Pipe
1" Plastic Pipe Adapter
Ejector Assembly
Foot Valve & Strainer
1-1/4" Plastic Suction Pipe
Special 1-1/4" Plastic Pipe
Adapter. (Supplied with Ejector)
Sanitary
Well Seal
1" Drive Pipe
Ejector Assembly
Foot Valve & Strainer
1-1/4" Suction Pipe
Threadless Coupling
A-OFFSET INSTALLATION
PLASTIC PIPE SHOWN
B-OVER THE WELL INSTALLATION
STEEL PIPE SHOWN
474 0194
Pump Pump
Gasket
Gasket
Adapter Flange
Adapter Flange
Threadless
Coupling
Sanitary
Well Seal
Steel Pipe Nipple
Coupling
1" Plastic Drive Pipe
1" Plastic Pipe Adapter
Ejector Assembly
Foot Valve & Strainer
1-1/4" Plastic Suction Pipe
Special 1-1/4" Plastic Pipe
Adapter. (Supplied with Ejector)
Sanitary
Well Seal
1" Drive Pipe
Ejector Assembly
Foot Valve & Strainer
1-1/4" Suction Pipe
Threadless Coupling
A-OFFSET INSTALLATION
PLASTIC PIPE SHOWN
B-OVER THE WELL INSTALLATION
STEEL PIPE SHOWN
474 0194

SINGLE PIPE EJECTOR INSTALLATION
Single pipe installations require (see Figure 8):
a. Galvanized steel pipe
b. Leather packer-type ejector with built-in foot valve
c. Turned couplings (supplied with packer-type ejector)
d. Well casing adapter.
Step 1. Connect ejector to first length of pipe. Use pipe joint compound
sparingly on male threads.
Step 2. Lower pipe into casing. Use special turned couplings (included
with 2” single pipe ejector package) to increase water flow. Use
pipe joint compound sparingly on male couplings threads.
NOTE: Fill pipe with water as each length is added to be sure foot valve
and connections do not leak.
Step 3. Add lengths of pipe until the ejector reaches the proper depth.
(Your well driller should supply this information.)
IMPORTANT: as a guide, the ejector should be set at least 10 to 20 feet
below the lowest water level with pump running, if possible, but always at
least 5 feet above the bottom of the well (see Figure 8).
Step 4. To properly seat the cup seals, after the ejector is correctly
positioned move the assembly up and down slightly. Water
pressure in the casing will then soak the cup seals (see Figure 8).
They should seal within 2-3 hours after installation.
Step 5. With ejector set, install well casing adapter. Remove pipe holder.
Align locating lugs and tighten adapter to form seal with well
casing.
DISCHARGE PIPE SIZES
Step 1. If increasing discharge pipe size, install reducer in pump discharge
port. Do not increase pipe size by stages.
Step 2. When the pump is set away from the points of water use, the
discharge pipe size should be increased to reduce pressure losses
caused by friction.
 •Upto100ftrun:Samesizeaspumpdischargeport.
 •100ft.to300ftrun:Increaseonepipesize.
 •300ft.to600ftrun:Increasetwopipesizes.
Figure 8
Well Casing
serves as
Drive Pipe
Suction
Pipe
Venturi
Nozzle
Ejector
JET NO. J32P- 24
Casing Adapter
(Use gasket
between adapter
and pump flange)
Cup
Leathers
Pump
mounted
on Casing
Adapter
5 Feet
or more
10 to 20 Feet
Water level
with pump
running
2357b 0697
Installation 6

Installation 7
PRESSURE TANK INSTALLATION – DEEP WELL
The Pressure Tank provides a reservoir of water under pressure and
maintains cushion of air pressure to prevent pipe hammering and possible
damage to plumbing components. When water is drawn off through house
fixtures, the pressure in the tank is lowered and the pressure switch starts
the pump.
STANDARD TANK CONNECTION
When a standard tank is used, an air volume control (AVC) adds air to the
tank when it is needed. See Figure 10 for typical standard tank installation.
To connect AVC to pump, thread a 1/4” compression fitting into tapped
hole on the front of the pump. Cut tubing to length to reach AVC; assemble
to fitting on pump and to AVC on tank. See installation instructions
provided with tank and AVC for details.
PRECHARGED TANK CONNECTION
When a precharged tank is used, no AVC is necessary. See Figure 10 for
typical precharged tank installation. A precharged tank contains a factory
provided air charge.
IMPORTANT: your pump pressure switch is set for a 30-50 PSI range
and requires a tank pre-charge of 28 PSI for proper operation (see Figure
11). See tank owner’s air charge. An annual check on tank charge is
recommended.
Figure 9: Pump With Standard Tank
Air Volume
Control
(AVC)
Standard Tank
AVC
Port
2355b 0697
1" Discharge
Relief Valve
Pressure
Regulator
Well Seal
AVC Tubing
Figure 10: Pump With Pre-charged
Tank
20 100
80
60
40
Relief Valve
Pressure
Regulator
1" Discharge
Pre-Charged
Pressure Tank
2358b 0697
Figure 11: Checking Tank Pre-charge
1054 0697
10
20
30
Check Pressure With
Tire Gauge

Hazardous voltage. Can shock, burn, or
kill. Connect ground wire before connecting power
supply wires. Use the wire size (including the ground
wire) specified in the wiring chart. If possible, connect
the pump to a separate branch circuit with no other
appliances on it.
Explosion hazard. Do not ground to a gas
supply line.
WIRING CONNECTIONS
Fire hazard. Incorrect voltage can cause
a fire or seriously damage the motor and voids the
warranty. The supply voltage must be within ±10% of the
motor nameplate voltage.
NOTICE: Dual-voltage motors are factory wired for 230
volts. If necessary, reconnect the motor for 115 volts, as
shown. Do not alter the wiring in single voltage motors.
Install, ground, wire, and maintain your pump in
compliance with the National Electrical Code (NEC) or
the Canadian Electrical Code (CEC), as applicable, and
with all local codes and ordinances that apply. Consult
your local building inspector for code information.
Electrical 8
Disconnect power before working on pump, motor, pressure switch, or wiring.
1 HP motor terminal boards (located under the motor end cover) should look like those below.
If the motor can operate at either 115 or 230 volts, it is set at the factory to 230 volts. Do not change motor wiring
if line voltage is 230 volts, or if you have a single voltage motor.
Never wire a 115 volt motor to a 230 volt line.
MOTOR SWITCH SETTINGS
Dial Type Voltage Selector
Voltage is factory set to 230 volts. To change to 115 volts:
1. Make sure power is off.
2. Turn the dial counter-clockwise until 115 shows in
the dial window as shown in Figure 13.
3. Attach the incoming power leads to the two outer
screws on the pressure switch as shown in Figure 14.
4. Attach the ground wire to the grounding connections
as shown in Figure 12.
5. If there are other wires, they should be capped.
6. Reinstall the Motor end cover.
Figure 12: Voltage set to 230 volts, Dial Type
Ground Wire Connection
Power Supply Connections
Voltage
Change
Dial
Pressure Switch
Figure 13: Voltage set to 115 volts, Dial Type

Electrical 9
WIRING CHART – Recommended Wire and Fuse Sizes
BRANCH DISTANCE IN FEET FROM MOTOR TO METER
MAX. FUSE* 0 51 101 201
MOTOR
VOLTS LOAD RATING TO TO TO TO
HP
AMPS AMPS 50 100 200 300
1 115 19.2 25 10 10 8 6
1 230 9.6 15 14 14 14 12
1-1/2 230 12.0 15 14 14 14 12
2 230 11.5 15 14 14 14 12
(*)Time delay fuse or circuit breakers are recommended in any motor circuit.
Connection Procedure:
Step 1. Connect the ground wire first as shown in Figure 12. The ground
wire must be a solid copper wire at least as large as the power
supply wires.
Step 2. There must be a solid metal connection between the pressure
switch and the motor for motor grounding protection. If the
pressure switch is not connected to the motor, connect the green
ground screw in the switch to the green ground screw under the
motor end cover. Use a solid copper wire at least as large as the
power supply wires.
Step 3. Connect the ground wire to a grounded lead in a service panel,
to a metal underground water pipe, to a metal well casing at least
ten feet (3M) long, or to a ground electrode provided by the power
company or the hydro authority.
Step 4. Connect the power supply wires to the pressure switch as shown in
Figure 12.

Operation 10
PRIMING THE PUMP
NEVER run pump dry. Running pump without water may
cause pump to overheat, damaging seal and possibly causing burns to
persons handling pump. Fill pump with water before starting.
NEVER run pump against closed discharge, to do so can
boil water inside pump, causing hazardous pressure in unit and possibly
scalding persons handling pump.
NOTE: Open water system faucets before priming pump for the first time.
Step 1. Remove pressure gauge.
a. Close regulator valve (turn clockwise - see Figure 14A).
b. Fill pump and suction pipe with water (Figure 14B).
c. Replace pressure gauge, using PTFE pipe thread sealant tape on
thread; tighten gauge.
IMPORTANT: If a priming tee and plug have been provided for a long
horizontal run, be sure to fill suction pipe through this tee and replace
plug. (Don’t forget to PTFE pipe thread sealant tape the plug.)
Step 2. Start Pump:
Pressure should build rapidly to 50 pounds per square inch or more
as ejector and pump prime.
IF NO PRESSURE OR NO WATER, REPEAT Step No. 1 (above) two or three
times to remove entrapped air from the suction pipes.
Step 3. If, after priming pump several times, no water is pumped, check the
following:
a. Suction pipe in the water and has no leaks.
NOTE: Air can leak in even where water won’t leak out. Make
sure all joints are tight.
b. Control valve, check valve, or foot valve installed and operating
correctly.
c. Pump trying to lift water more than 25 feet (shallow well)
or more than rated lift for deep well ejector used (including
compensation for horizontal offset).
d. Be sure pump is not airlocked. In offset installations, pump
suction port should be highest point in suction pipe; there should
be no sags in suction pipe (run it straight and at a slight angle
upward from well head to pump).
NOTE: For deep well installation, go to Step 4 (Page 11). Shallow well
installations go to Step 6 (Page 11).
20 100
80
60
40
2361a 0697
Figure 14A: Close Regulator
2360a 0697
Figure 14B: Fill Pump with Water
20 100
80
60
40
1030a 0697
1060a 0697
ON
Figure 14D: Adjust Regulator
Figure 14C: Start Pump

Operation 11
Step 4. Once unit has primed and pressure stabilized, slowly open
regulator valve (turn counterclockwise - Figure 15A) until pressure
falters (pressure gauge needle flutters; pump may become noisy -
see Figure 15B). At this point, close regulator valve slightly (turn
clockwise) until pressure stabilizes. This setting provides maximum
flow (Figure 15C).
Step 5. Pump may draw well down far enough at this point to lose its
prime. If so, close regulator valve until pressure is stable throughout
pumping cycle. Close faucets and allow pump to pressurize tank
and shut off.
Step 6. Check system by alternately opening and closing faucets in the
system. With faucets open, pressure will drop until pump starts;
with faucets closed, pressure will build up until pump shuts off.
Step 7. There are conditions of deep well operation when the regulator
valve may be completely open without any faltering of pressure. In
this case, operate pump with regulator valve completely open.
HOW TO HANDLE A GASEOUS WELL
In some areas well water contains gases which must be allowed to escape
before the water is used. To deliver gas-free water suspend a pipe, closed
at the bottom and open at the top, so that it surrounds the suction pipe
inlet. (See Figure 16). Since the gases rise in the well casing, the water
sucked down through the pipe and into the suction pump is free of gas.
This type of well must be vented to the outside of any enclosure.
AIR CONTROL IN FLOWING WELLS
Flowing wells or wells with little or no drawdown, could create a
special problem in air control in the operation of your standard tank
system. In such cases, a pre-charged tank (which needs no air control) is
recommended.
Figure 15A: Open Regulator Valve
20 100
80
60
40
2871 0697
Figure 15B: Watch for Pressure Gauge
to Flutter
20 100
80
60
40
2872 0697
Figure 15C: Close Regulator Valve
until Pressure Stabilizes
20 100
80
60
40
2873 0697
Figure 16: Gas/Air Control in Well
Pipe strap or
wire to hold
pipe sleeve
Pipe
sleeve
Pipe
cap
Tail
pipe
Foot
valve
Ejector
2876 0697
Gases
rise to
surface

Maintenance 12
PUMP DISASSEMBLY/ASSEMBLY
Step 1. Pull disconnect switch. Disconnect power lines from pressure
switch.
Step 2. Remove the two cap screws holding the pump to the flange
adapter. Don’t disturb the piping in the well.
Step 3. Remove the flange adapter gasket and scrape the surfaces clean.
Step 4. Leaving the tubing in place, unscrew and remove the straight
barbed fitting at the pressure switch.
Step 5. Draw a line down the side of the pump with a marker to help
alignment during reassembly. Mark the pump from the motor to
the base volute (see Figure 17).
Step 6. Turn the pump upside down on the bench and block it. Remove
the four cap screws from the base. With a mallet, tap upward on
the base to loosen it. Lift the base off of the intermediate volute
(see Figure 18).
Step 7. To reduce the chance of dropping the pump onto your foot, lay it
down on the bench; block it so it won’t roll.
Step 8. Hold the motor shaft with pliers or vice grips through the opening
in the pump adapter. Unscrew the impeller nut off the end of the
shaft (see Figure 19).
Step 9. The impellers are keyed to the shaft and do not unscrew. Insert
two screw drivers on opposite sides under the exposed impeller
and pry the impeller off (Figure 20) to remove it.
Step 10. Carefully tap a small screwdriver or thin bladed chisel in between
the intermediate volute and the pump adapter in two or three
places around the pump to separate the castings (Figure 21).
Do not mar the sealing surfaces; do not break pieces out of the
adapter or volute – the castings are easily damaged.
Step 11. Remove the intermediate volute and slide the impeller spacer off
of the shaft.
Step 12. Remove the impeller. Don’t disturb the shaft keys if you are only
replacing the seal.
Step 13. Rotate the seal spring retainer cup so that the slot lines up with
the shaft keys; remove the cup and spring.
Step 14. Remove the two cap screws holding the adapter bracket to the
motor.
Step 15. With two screwdrivers on opposite sides of the pump, carefully
pry the pump adapter away from the motor. This will pull the seal
off of the motor shaft. Use caution to make sure that the ceramic
seal does not dig into the shaft and scratch the shaft’s sealing
surface.
INSTALLATION OF NEW SEAL
Step 1. Clean all gasket surfaces thoroughly before reassembly. Clean the
seal bore cavity in the pump adapter.
Step 2. Wet the rubber seat ring with soapy water and push the stationary
part of the seal into the seal bore cavity. Use a piece of 1” pipe
pressing on a cardboard washer (to prevent damaging seal surface)
as a press. Make sure that the seal half is fully seated in the seal
bore cavity. Remove the cardboard once the seal is in place.
1801 0595
Figure 17
1802 0595
Figure 18
Figure 20
Figure 19
Figure 21

Maintenance 13
Step 3. Make sure that the shaft keys are in place on the shaft. If they are
not, squeeze them in place now with slip joint pliers. Do not tap
them or hit them with a hammer; you could bend the shaft (see
Figure 22). When the keys are correctly installed, the adapter will
pass over the keys without interference.
Step 4. Carefully slide the adapter over the shaft (see Figure 23). Do not
damage the shaft sealing surface; it is highly polished and any
slight scratches or nicks will ruin it.
Step 5. Using the alignment marks made before disassembly, line up the
adapter with the motor and bolt the adapter in place. Tighten the
cap screws evenly.
Step 6. Push the shaft seal and seal spring onto the shaft, after making
sure that the seal faces and shaft are clean. Take care that the
shaft shoulder does not damage the carbon seal face. Follow the
seal spring with the spring holder; compress the spring and give
the spring holder a quarter turn to lock it under the first shaft key
(see Figure 24).
Step 7. Slide the first impeller onto the shaft; follow it with the impeller
spacer. Twist the impeller on the shaft to make sure that the shaft
key is still in place and the impeller is locked to the shaft (the
shaft should turn with the impeller).
Step 8. Install a new volute gasket, lining up the bolt holes with the bolt
holes in the adapter. Make sure the gasket is right side up so that
the water passage holes line up with the water passages in the
volutes.
Step 9. Install the intermediate volute, aligning it with the mark made
before disassembly. Use the long cap screws to check this
alignment. It cannot be stressed too strongly that all bolt holes and
water passages of all gaskets and volutes MUST line up with each
other, or the pump will not be assembled correctly.
Step 10. Make sure the second shaft key is in place and install the second
impeller. Twist the impeller to make sure that the shaft key is
still in place. Hold the motor shaft with slip-joint pliers or vice-
grips and install and tighten the impeller locknut. Tightening
the lock nut automatically spaces the impeller correctly. Do not
overtighten.
Step 11. Install the base volute gasket. Make sure the gasket is right side up
so that the water passage holes line up with the water passages
in the volutes. Install the base volute, using the alignment marks
made before disassembly. Make sure that the pump discharge will
correctly meet the the piping when the pump is reinstalled.
Step 12. Insert the four base capscrews and tighten evenly (see Figure 25).
These should be easy to install if everything is correctly aligned.
If not, don’t force them; go back over your work and find and
correct the misalignment.
Step 13. Reinstall the pressure switch barb fitting and pressure tube.
Step 14. Reinstall the pump on the adapter flange (use a new gasket) and
reconnect the wiring and grounding. Pump is now ready for
operation.
Use pliers –
with care –
no hammers.
Figure 22
Figure 24
Align
Marks
Figure 23
Make sure
all marks
line up.
Bolts should
be easy to
insert.
1809 0595
Figure 25

Troubleshooting 14
* (Note: Stop pump;
then check prime
before looking
for other causes.
Unscrew priming
plug and see if water
is in priming hole).
SYMPTOM POSSIBLE CAUSE(S) CORRECTIVE ACTION
Motor will not run Disconnect switch is off Be sure switch is on.
Fuse is blown or circuit breaker tripped Replace fuse or reset circuit breaker.
Starting switch is defective DISCONNECT POWER; Replace starting switch.
Wires at motor are loose, Refer to instructions on wiring (Page 8). DISCONNECT POWER; check and
disconnected, or wired incorrectly tighten all wiring.
Capacitor voltage may be hazardous. To discharge
capacitor, hold insulated handle screwdriver BY THE HANDLE and
short capacitor terminals together. Do not touch metal screwdriver
blade or capacitor terminals. If in doubt, consult a qualified electrician.
Pressure switch contacts are dirty DISCONNECT POWER and file contacts with emery board or nail file.
Motor runs hot and Motor is wired incorrectly Refer to instructions on wiring.
overload kicks off Voltage is too low Check with power company. Install heavier wiring if wire size is too small
(See Electrical / Wiring Chart).
Pump cycles too frequently See section below on too frequent cycling.
Motor runs but no Pump in new installation did In new installation:
water is delivered* not pick up prime through:
1. Improper priming 1. Re-prime according to instructions.
2. Air leaks 2. Check all connections on suction line, AVC, and ejector with
soapy water or shaving cream.
3. Leaking foot valve or check valve 3. Replace foot valve or check valve.
Pump has lost prime through: In installation already in use:
1. Air leaks 1. Check all connections on suction line and shaft seal.
2. Water level below suction pipe inlet 2. Lower suction line into water and re-prime. If receding water level
in well exceeds 25’ (7.6M), a deep well pump is needed.
Foot valve or strainer is plugged Clean foot valve or strainer.
Ejector or impeller is plugged Clean ejector or impeller.
Check valve or foot valve is stuck shut Replace check valve or foot valve.
Pipes are frozen Thaw pipes. Bury pipes below frost line. Heat pit or pump house.
Foot valve and/or strainer are Raise foot valve and/or strainer above bottom of water source.
buried in sand or mud Clean foot valve and strainer.
Pump does not Water level in well is lower than A deep well jet will be needed if your well is more than 25’ (7.6M)
deliver water to full estimated depth to water.
capacity Steel piping (if used) is corroded or Replace with plastic pipe where possible, otherwise with new steel pipe.
(Also check point limed, causing excess friction
3 immediately above) Offset piping is too small in size Use larger offset piping.
Pump delivers water but Pressure switch is out of adjustment or DISCONNECT POWER; adjust or replace pressure switch.
does not shut off or contacts are welded together
pump cycles too Faucets have been left open Close faucets.
frequently Venturi, nozzle or impeller is clogged Clean venturi, nozzle or impeller.
Water level in well is lower Check possibility of using a deep well jet pump
than estimated
Standard pressure tank is waterlogged Drain tank to air volume control port. Check AVC for defects. Check
and has no air cushion all connections for air leaks.
Pipes leak Check connections.
Foot valves leak Replace foot valve.
Pressure switch is out of adjustment Adjust or replace pressure switch
Air charge too low in pre-charged tank DISCONNECT POWER and open faucets until all pressure is relieved.
Using tire pressure gauge, check air pressure in tank at valve stem
located on the tank. If less than pressure switch cut-in setting (30-50
PSI), pump air into tank from outside source until air pressure is 2 PSI
less than cut-in setting of switch. Check air valve for leaks (use soapy
solution) and replace core if necessary.
Air spurts from faucets Pump is picking up prime When pump has picked up prime, it should pump solid water with no air.
Leak in suction side of pump Suction pipe is sucking air. Check joints for leaks with soapy water.
Well is gaseous Consult factory about installing a sleeve in the well
Intermittent over-pumping of well. Lower foot valve if possible, otherwise restrict pump discharge
(Water drawn down below foot valve.)

Repair Parts 15
20 100
80
60
40
Repair Parts – Multi-Stage Jet
Key Part With No. MVPH-100 MVPH-150 MVPH-200
No. Description Kit Used 1 HP 1-1/2 HP 2 HP
1 Motor-115/230V Single Phase 1 A300CH A300DH A300EH
1 Motor-230V Single Phase 1 A300FH AE300GH
1A Motor Canopy 1 U18-1300 U18-1355 U18-1355
2 Connector 1 J43-13C J43-13C J43-13C
3 Locknut - 1/2"1 U36-112ZP U36-112ZP U36-112ZP
4 Pressure Switch 1 U217-1216 U217-204E U217-204E
5 Barbed Fitting - Straight 1 U111-211T U111-211T U111-211T
6 Switch Tube - 14-1/2"1 U37-672P U37-672P U37-672P
7 Pressure Regulator Assembly 1 J212-24E J212-24E J212-24E
7A Pressure Gauge 1 U239-3 U239-8 U239-8
8 Barbed Fitting - Elbow 1 U111-212T U111-212T U111-212T
9 Adapter 1 L2-16A L2-16A L2-16A
10 Capscrew - 3/8"-16x1-1/4" Lg. 2 U30-75ZP U30-75ZP U30-75ZP
11 Shaft Key OH/SG 2 U65-15SS U65-15SS(3) U65-15SS(3)
12 Shaft Seal OH/SG 1 17351-0101A 17351-0101A 17351-0101A
13 Spring Holder OH/SG 1 J24-11 J24-11 J24-11
14 Impeller OH 2 J105-76P J105-74PA(3) J105-74P(3)
15 Spacer - Impeller (1 or 2 required) – J43-23 J43-23 J43-23
16 Intermediate Volute w/Wear Rings & Gasket (1) J101-26 J101-26(2) J101-26(2)
16A Gasket OH/SG (1) J20-11 J20-11 J20-11
16B Wear Ring OH (1) J23-10 J23-10 J23-10
16C Wear Ring OH (1) J23-11 J23-11 J23-11
17 Impeller Stop Nut 1 U36-175SSW U36-175SSW U36-175SSW
18 Base Volute Complete 1 J101-33 J101-33A J101-33A
18A Gasket OH/SG (1) J20-11 J20-11 J20-11
18B Wear Ring OH (1) J23-10 J23-10 J23-10
19 Pipe Plug - 1/4"NPT (1) U78-941ZPV U78-941ZPV U78-941ZPV
20 Capscrew - 3/8"-16x4-1/4" Lg. (4) U30-82ZP – –
20 Capscrew - 3/8"-16x6" Lg. (4) – U30-81ZP U30-81ZP
SERVICE KITS
Seal and Gasket Kit (SG) 1 PP1650 PP1650 PP1650
Overhaul Kit (OH) 1 PP1657 PP1658 PP1659

Repair Parts 16
Casing Adapters – (Not included with pump)
Adapter Flange – (Not included with pump)
1
2
3
489 0194
1
2
4
3
5
6
377 1293
Item 1-Remove paper
backing form gasket before
applying.
Item 2-Align locating lug on
flange with locating lug on
base volute.
Item 1-Remove paper
backing form gasket before
applying.
Item 2-Align locating lug on
flange with locating lug on
base volute.
376 1293
1
1A
2A
2B
2C
2D
4
5
2E 2F
2
3
6
7
8
9
10
20 100
80
60
40
Pressure Regulator
Key Part
No. Description J212-24 J212-24A
1 Pressure Regulator w/Seat J112-14 J112-14
1A Valve Seat J66-16 J66-16
2 Diaphragm Assembly J220-16B J220-16B
2A Regulator Guide J42-5 J42-5
2B Stem J62-9 J62-9
2C Diaphragm J20-16 J20-16
2D Spring Follower J43-31 J43-31
2E Lock Washer U43-23ZP U43-23ZP
2F Nut 1/4-20 U36-36ZP U36-36ZP
3 Reducer Bushing 1/2x1/8 NPT U78-107DT U78-107DT
4 Pressure Gauge * *
5 Spring J24-13 J24-13
6 Spring Guide J61-5 J61-5
7 Bonnet J52-9 J52-9
8 Capscrew 5/16-18x3/4"Lg. (4) U30-60ZP U30-60ZP
9 Adjusting Screw 5/16-18 U30-69FTZP U30-69FTZP
10 Locknut 5/16-18 U36-205ZP U36-205ZP
Key Part J216-21 J216-22 J216-23
No. Description Qty. 2” 2-1/2” 3”
1 Gasket 1 J20-12 J20-12 J20-12
2 Adapter Body 1 J51-10 J51-9 J51-9
3 Seal Ring 1 J21-17 J21-24 J21-21
4 Lower Flange 1 J16-20ZZP J16-30ZZP J16-24ZZP
5 Capscrew,
3/8-16x1-1/2 Lg. 3 U30-76ZP U30-76ZP U30-76ZP
6 Capscrew,
1/2-13x1-1/4"2 U30-86PS U30-86PS U30-86PS
Key Part J216-26 J216-27
No. Description Qty. 1-1/4x1 1-1/4x1-1/4
1 Gasket 1 J20-12 J20-12
2 Adapter Flange 1 J2-15 –
2 Adapter Flange 1 – J2-17B
3 Capscrew 2 U30-86ZP U30-86ZP
* The Pressure Gauge is not supplied with the Regulator. See Page 15.