Stenner Pumps SVP4L1 Manual

TO BE INSTALLED AND MAINTAINED BY PROPERLY TRAINED
PROFESSIONAL INSTALLER ONLY. READ MANUAL & LABELS
FOR ALL SAFETY INFORMATION & INSTRUCTIONS.
WARNING
SVP SERIES
INSTALLATION AND MAINTENANCE MANUAL
PERISTALTIC METERING PUMPS SINCE 1957

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2
TABLE OF CONTENTS
WARRANTY AND SERVICE POLICY............................................ 3
SAFETY INFORMATION................. 4-5, 9, 10, 12-16, 18, 19, 21-23, 30
OUTPUTS............................................................................. 6
MATERIALS OF CONSTRUCTION .............................................. 7
ACCESSORY CHECKLIST ........................................................ 8
INSTALLATION.................................................................. 9-18
TROUBLESHOOTING......................................................... 19-21
SUBASSEMBLY CONNECTIONS .............................................. 22
TUBE REPLACEMENT ....................................................... 23-29
CLEANING THE POINT OF INJECTION .................................. 30-32
PUMP HEAD – EXPLODED VIEW AND PARTS ............................ 33
PUMP HEAD....................................................................... 34
PUMP HEAD SERVICE KITS ................................................... 35
PUMP TUBES ..................................................................... 36
CHECK VALVES ................................................................... 37
IMSVP 021717

US and Canada 800.683.2378, International 904.641.1666
WARRANTY AND CUSTOMER SERVICE
LIMITED WARRANTY
Stenner Pump Company will for a period of one (1) year from the date of purchase (proof
of purchase required) repair or replace – at our option – all defective parts. Stenner is not
responsible for any removal or installation costs. Pump tube assemblies and rubber
components are considered perishable and are not covered in this warranty. Pump tube
will be replaced each time a pump is in for service, unless otherwise specified. The cost of
the pump tube replacement will be the responsibility of the customer. Stenner will incur
shipping costs for warranty products shipped from our factory in Jacksonville, Florida. Any
tampering with major components, chemical damage, faulty wiring, weather conditions,
water damage, power surges, or products not used with reasonable care and maintained in
accordance with the instructions will void the warranty. Stenner limits its liability solely to
the cost of the original product. We make no other warranty expressed or implied.
RETURNS
Stenner offers a 30-day return policy on factory direct purchases. Except as otherwise
provided, no merchandise will be accepted for return after 30 days from purchase. To
return merchandise at any time, call Stenner at 800.683.2378 for a Return Merchandise
Authorization (RMA) number. A 15% re-stocking fee will be applied. Include a copy of your
invoice or packing slip with your return.
PROBLEM WITH SHIPMENT
Check orders immediately upon arrival. Any claim of damage, shortage or order
discrepancy must be noted on the delivery receipt and reported to Stenner Customer
Service at 800.683.2378 within seven (7) days of receipt.
PUMP SERVICE & REPAIRS
Before returning a pump for warranty or repair, remove chemical from pump tube by
running water through the tube, and then run the pump dry. Following expiration of the
warranty period, Stenner Pump Company will clean and overhaul any Stenner metering
pump for a minimum labor charge plus necessary replacement parts and shipping. All
metering pumps received for overhaul will be restored to their original condition. The
customer will be charged for missing parts unless specific instructions are given. To return
merchandise for repair, call Stenner at 800.683.2378 or 904.641.1666 for a Return
Merchandise Authorization (RMA) number.
DISCLAIMER
The information contained in this manual is not intended for specific application purposes.
Stenner Pump Company reserves the right to make changes to prices, products, and
specifications at any time without prior notice.
3

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SAFETY INFORMATION
Warns about hazards that CAN cause death, serious personal
injury, or property damage if ignored.
ELECTRIC SHOCK HAZARD
ELECTRIC SHOCK HAZARD:
Pump supplied with grounding power cord and attached plug. To reduce risk of
electrical shock, connect only to a properly grounded, grounding type receptacle.
Install only on a circuit protected by a Ground-Fault Circuit-Interrupter (GFCI).
DANGER DE CHOC ÉLECTRIQUE:
La pompe est dote!e d’un cordon d’alimentation avec mise a"la terre muni d'une
fiche. Pour re!duire le risque de choc e!lectrique, branchez uniquement sur une prise
correctement mise a"la terre. Installez uniquement sur un circuit prote!ge!par un
disjoncteur diffe!rentiel.
DO NOT alter the power cord or plug end.
DO NOT use receptacle adapters.
DO NOT use pump with a damaged or altered power cord or plug. Contact the
factory or an authorized service facility for repair.
HAZARDOUS VOLTAGE:
DISCONNECT power cord before removing motor cover for service. Electrical
service by trained personnel only.
EXPLOSION HAZARD:
This equipment IS NOT explosion proof. DO NOT install or operate in an
explosive environment.
RISK OF CHEMICAL EXPOSURE:
Potential for chemical burns, fire, explosion, personal injury, or property damage. To
reduce risk of exposure, the use of proper personal protective equipment is mandatory.
RISK OF FIRE HAZARD:
DO NOT install or operate on any flammable surface.
To reduce the risk of injury, do not permit children to use this
product. This appliance is not to be used by persons with reduced physical, sensory
or mental capabilities, or lack of experience and knowledge, unless they have been
given supervision or instruction.
VAC MODELS ONLY

US and Canada 800.683.2378, International 904.641.1666 5
SAFETY INFORMATION continued
NOTICE: Indicates special instructions or general mandatory action.
NOTICE: This metering pump is portable and designed to be removable from the
plumbing system without damage to the connections.
NOTICE: Before installing or servicing the pump, read the pump manual for all safety
information and complete instructions. The pump is designed for installation and
service by properly trained personnel.
NOTICE: Installation and product must adhere to all regulatory and compliance
codes applicable to the area.
NOTICE: This metering pump and its components have been tested for use with the
following chemicals: Sodium Hypochlorite (10-15%), Muriatic Acid (20-22% Baume,
31.5% HCl), and Soda Ash.
AVIS: Cette pompe de dosage et ses composants ont e!te!teste!s pour leur
compatibilite!avec les produits chimiques suivants : hypochlorite de sodium (10 a"15
%), acide chlorhydrique (20 a"22 % Baume, 31,5 % HCl), et carbonate de sodium.
This is the safety alert symbol. When displayed in this manual or on the
equipment, look for one of the following signal words alerting you to the
potential for personal injury or property damage.
PUMP SUITABLE FOR INDOOR USE.
Pompe adapte!e a"une utilisation a"l’inte!rieur.
Electrical installation should adhere to all national and local codes. Consult a
licensed professional for assistance with proper electrical installation.
Pump uses a class 2 auto switching power supply for AC input voltage rated
100-240VAC.
VAC MODELS ONLY

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VARIABLE SPEED – APPROXIMATE FLOW RATE OUTPUT
FLOW RATE OUTPUT CHARTS
MODEL MAXIMUM PUMP TUBE Gallons Liters Gallons Liters Ounces Milliliters
PRESSURE NUMBER per Day per Day per Hour per Hour per Minute per Minute
SVP1H1* 100 psi (6.9 bar) #1 0.3 to 5.0 1.1 to 18.9 0.01 to 0.21 0.05 to 0.79 0.03 to 0.44 0.76 to 13.13
SVP1L1 25 psi (1.7 bar)
SVP1H2* 100 psi (6.9 bar) #2 0.8 to 17.0 3.0 to 64.4 0.03 to 0.71 0.13 to 2.68 0.07 to 1.51 2.08 to 44.65
SVP1L2 25 psi (1.7 bar)
SVP1L3 25 psi (1.7 bar) #3 2.0 to 40.0 7.6 to 151.4 0.08 to 1.67 0.32 to 6.31 0.18 to 3.55 5.27 to 105.14
SVP1L4 25 psi (1.7 bar) #4 3.0 to 60.011.4 to227.1 0.13 to2.50 0.48 to9.46 0.27 to 5.33 7.92 to 157.71
SVP1L5 25 psi (1.7 bar) #5 4.3 to85.0 16.3to321.8 0.18to3.54 0.68to13.40 0.38to7.55 11.32to223.40
SVP1H7* 100 psi (6.9 bar) #7 2.0 to 40.0 7.6to151.4 0.08to1.67 0.32to 6.31 0.18 to 3.55 5.27 to 105.14
VARIABLE SPEED WITH 4-20mA INPUT – APPROXIMATE FLOW RATE OUTPUT
MAX. 48 VDC/128 ohm (Input Signal Voltage/Input Signal Resistance)
NOTICE: The information within this chart is solely intended for use as a guide. The output data is an approximation based on
pumping water under a controlled testing environment. Many variables can affect the output of the pump. Stenner Pump
Company recommends that all metering pumps undergo field calibration by means of analytical testing to confirm their outputs.
*Injection check valve is included with pumps rated at 26-100 psi (1.8-6.9 bar)
MODEL MAXIMUM PUMP TUBE Gallons Liters Gallons Liters Ounces Milliliters
PRESSURE NUMBER per Day per Day per Hour per Hour per Minute per Minute
SVP4H1* 100 psi (6.9 bar) #1 0.3 to 5.0 1.1 to 18.9 0.01 to 0.21 0.05 to 0.79 0.03 to 0.44 0.76 to 13.13
SVP4L1 25 psi (1.7 bar)
SVP4H2* 100 psi (6.9 bar) #2 0.8 to 17.0 3.0 to 64.4 0.03 to 0.71 0.13 to 2.68 0.07 to 1.51 2.08 to 44.65
SVP4L2 25 psi (1.7 bar)
SVP4L3 25 psi (1.7 bar) #3 2.0 to 40.0 7.6 to 151.4 0.08 to 1.67 0.32 to 6.31 0.18 to 3.55 5.27 to 105.14
SVP4L4 25 psi (1.7 bar) #4 3.0 to 60.011.4 to227.1 0.13 to2.50 0.48 to9.46 0.27 to 5.33 7.92 to157.71
SVP4L5 25 psi (1.7 bar) #5 4.3 to85.0 16.3to321.8 0.18to3.54 0.68to13.40 0.38to7.55 11.32to223.40
SVP4H7* 100 psi (6.9 bar) #7 2.0 to 40.0 7.6to151.4 0.08to1.67 0.32to 6.31 0.18 to 3.55 5.27 to 105.14

US and Canada 800.683.2378, International 904.641.1666 7
MATERIALS OF CONSTRUCTION
All Housings
Polycarbonate
Peristaltic Tube & Check Valve Duckbill
Santoprene®*, FDA approved
Peristaltic Tube
Versilon®**, FDA approved
Check Valve Duckbill
Pellethane®†
Suction/Discharge Tubing & Ferrules (1/4" & 6 mm)
Polyethylene, FDA Approved
Tube Fittings
Santoprene®* Tube: Polypropylene, NSF listed
Versilon®** Tube: Type 1 Rigid PVC, NSF listed
Check Valve Fittings
Type 1 Rigid PVC, NSF listed
Connecting Nuts
Type 1 Rigid PVC or Polypropylene
Weighted Suction Line Strainer
PP or Type 1 Rigid PVC body with Type 1 Rigid PVC cap, NSF listed; ceramic weight
All Fasteners
Stainless Steel
*Santoprene®is a registered trademark of Exxon Mobil Corporation.
** Versilon®is a registered trademark of Saint-Gobain Performance Plastics.
†Pellethane®is a registered trademark of The Dow Company.

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ACCESSORY CHECKLIST
PRE-INSTALLATION
25 psi Accessory Kit Contents
3 Connecting Nuts 1/4" or 3/8"
3 Ferrules 1/4" & 6 mm Europe
1 Injection Fitting
1 Weighted Suction Line Strainer 1/4", 3/8" or 6 mm Europe
1 20' Roll of Suction/Discharge Tubing
1/4" or 3/8" White or UV Black OR 6 mm White Europe
1 Additional Pump Tube
1 Installation Manual
100 psi Accessory Kit Contents
3 Connecting Nuts 1/4" or 3/8"
3 Ferrules 1/4" & 6 mm Europe
1 Injection Check Valve
1 Weighted Suction Line Strainer 1/4" or 3/8" or 6 mm Europe
1 20' Roll of Suction/Discharge Tubing
1/4" or 3/8" White or UV Black OR 6 mm White Europe
1 Additional Pump Tube
1 Installation Manual
NOTE: SVP4 includes 1 4-20mA input signal cord.

US and Canada 800.683.2378, International 904.641.1666 9
INSTALLATION
ADDITIONAL SAFETY INSTRUCTIONS
NOTICE: Indicates special instructions or general mandatory action.
Read all safety hazards before installing or servicing the pump. The pump is
designed for installation and service by properly trained personnel.
Use all required personal protective equipment when working on or near a chemical
metering pump.
Install the pump so that it is in compliance with all national and local plumbing
and electrical codes.
Use the proper product to treat potable water systems, use only chemicals listed or
approved for use.
Install the pump to work in conjunction with well pump or system controls.
Inspect tube frequently for leakage, deterioration, or wear. Schedule a regular pump
tube maintenance change to prevent chemical damage to pump and/or spillage.
Pump is not recommended for installation in areas where leakage can cause
personal injury or property damage.

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INSTALLATION continued
DEFINITIONS
Manual Mode of Operation
The pump is operated by manually adjusting the motor speed with the keypad. SVP1 and
SVP4 models.
Automatic Mode of Operation
The pump is paced by an external 4-20mA signal, LED light illuminate. SVP4 models only.
MOUNT PUMP
Select a dry location (to avoid water intrusion and pump damage) above the
solution tank.
To prevent pump damage in the event of a pump tube leak, never mount the pump
vertically with the pump head up.
To avoid chemical damage from fumes, DO NOT mount pump directly over an open
solution tank. Keep tank covered.
Avoid flooded suction or pump mounted lower than the solution container. Draw
solution from the top of the tank. Pump can run dry without damage. If pump is
installed with a flooded suction, a shut-off valve or other device must be provided
to stop flow to pump during service.
DO NOT allow water intrusion into the motor or corrosion and damage will occur.
4-20mA Mode Light
Increase Speed
Decrease Speed
Output Percentage
Power
Prime
SVP Keypad

US and Canada 800.683.2378, International 904.641.1666 11
INSTALLATION DIAGRAM
Grounded Power Outlet;
protected by Ground-Fault
Circuit-Interrupter (GFCI)
Solution Tank
Disassembled View
Shut-Off Valve
Discharge Line
Suction Line
Injection
Fitting
0-25 psi
Injection
Check Valve
26-100 psi
Flow direction
of solution
Disassembled View
Duckbill
Injection Check Valve
or Injection Fitting
VAC MODELS ONLY

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SAFETY INFORMATION
RISK OF EQUIPMENT MALFUNCTION OR DAMAGE
DO NOT connect input signal cord to any AC electrical supply.
DO NOT exceed 48VDC input signal.
RISQUE DE DEFAUT DE FONCTIONNEMENT OU DE
DOMMAGES A L’EQUIPEMENT
NE JAMAIS connecter le cordon du signal d’entrée à n’importe quelle source de
courant alternatif.
NE PAS excéder le signal d’entrée 48VDC.
NOTICE: Indicates special instructions or general mandatory action.
Pump is not a source or power supply for the 4-20mA signal loop. Refer to input
signal specifications.
Pump and input signal must be “OFF” prior to connecting input signal. Failure to
follow this warning may result in microcontroller corruption and erratic operation.
Failure to connect input signal with proper polarity will result in the pump not
responding to the input signal.
The LED display can vary if the pump is exposed to a 9-30MHz signal when
operating in the “automatic” mode.
Notification: Indique des instructions spéciales ou l'action obligatoire générale.
La pompe n’est pas une source ni une alimentation en courant pour la boucle de
signal 4 à 20mA. Consulter les spécifications du signal d’entrée.
Mettre sur Arrêt (“OFF”) la pompe et le signal d’entrée, avant d’effectuer la
connexion du cordon du signal d’entrée. Si cette précaution n’est pas prise, la
micro-contrôleur risque d’être corrompu et le fonctionnement irrégulier.
Si le signal d’entrée n’est pas connecté à la polarité appropriée, la pompe ne réagira
pas à ce signal.
L’afficheur LED peut varier si la pompe est exposée à un signal 9-30MHz en
fonctionnant en mode “automatique.”

US and Canada 800.683.2378, International 904.641.1666 13
INSTALLATION continued
VERIFY VOLTAGE AND POWER
To prevent motor damage, verify with a volt meter that the receptacle voltage
corresponds with the pump voltage.
1. Plug cord into receptacle.
2. Press the ON/OFF button located on the keypad to verify the unit is turned on. Red
LED display will light up when supply voltage is present and unit is turned ON.
SVP1 Model
The SVP1 does not have 4-20mA capabilities and only operates in manual mode
of operation. The output can be incremented through its available speed range by
utilizing the UP/DOWN keys on the keypad. Press ON/OFF button again to turn the
metering pump off.
SVP4 Model
• In the manual mode of operation, the metering pump functions identically to
the SVP1. To change to automatic mode of operation, simultaneously press both
the UP and DOWN keys and hold for two seconds. The mode of operation will
change and be indicated by a small LED light located at the left side of the
display. Any settings entered in the variable speed mode will remain in memory.
• If using the automatic mode of operation (4-20mA DC analog signal), plug the
input signal connector (10' cable) to the receptacle located on the front of the
pump beneath the pump head. Connect the jacketed cable to the supply
conductor (4-20mA source) ensuring proper polarity. Red is positive, black is
negative. Press ON/OFF button again to turn the metering pump off.
More on next page

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INSTALLATION continued
INSTALL SUCTION LINE TO PUMP HEAD
1. Uncoil the suction/discharge line. Use outside of solution tank as a guide to cut
proper length of suction line ensuring it will be 2-3" above the bottom of solution tank.
Allow sufficient slack to avoid kinks and stress cracks. Always make a clean
square cut to assure that the suction line is burr free. Normal maintenance
requires trimming.
Suction lines that extend to the bottom of the tank can result in debris pickup
leading to clogged injectors and possible tube failure.
2. Make connections by sliding the line(s) through connecting nut*and ferrule and
finger tighten to the corresponding tube fittings. Suction side tube connection is
indicated by “IN” on the tube housing cover.
3. Finger tighten nut to the threaded tube fitting while holding the tube fitting.
Over tightening the ferrule and nut with a wrench may result in damaged fittings,
crushed ferrules, and air pick up.
DO NOT use thread seal tape on pump tube connections or tools to
tighten connections.
More on next page
Suction
Line
Discharge
Line
* For 3/8" connections only. While stabilizing the tube fitting, attach female end of adapter to the tube fitting(s)
(ferrule inside). Slide line through 3/8" connecting nut and finger tighten to male end of adapter. If leak
occurs, gradually tighten the 3/8" connecting nut as required.
Finger tighten
1/4" nut
Ferrules
Connecting Nut
NOTE: Beveled ends of
ferrules face pump. Tubing
should bottom into all fittings.
DO NOT use thread
seal tape on pump
tube threads.
DO NOT
use pliers.

US and Canada 800.683.2378, International 904.641.1666 15
INSTALLATION continued
INSTALL SUCTION WEIGHT TO SUCTION LINE
1. Drill a hole into the bung cap or solution tank lid. Slide the tubing through and secure
the weighted strainer to the line.
2. To attach the strainer, slide approximately 3.5" of tubing through the collet and lock
into place on strainer body. Pull tubing to make sure it is secure.
3. Suspend slightly above tank bottom to reduce the chance of sediment pickup.
DO NOT mix chemicals in the solution container. Follow recommended mixing
procedures according to the manufacturer.
DO NOT operate pump unless chemical is completely in solution. Turn pump off
when replenishing solution.
DO NOT slide tubing all the way to the bottom of the weighted strainer. Tubing
could become flush with the nose of the strainer and the pump may not prime
due to blockage.
More on next page
3"
Suction Line
3.5"
(9 cm)
Weighted
Suction Line
Strainer

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16
INSTALLATION continued
INSTALL DISCHARGE LINE TO PUMP HEAD AND INJECTION POINT
1. Make a secure finger tight connection on the discharge fitting of the pump head as
instructed in Install Suction Line instructions.
DO NOT use thread seal tape on pump tube connections or tools to
tighten connections.
HAZARDOUS PRESSURE: Shut off water or circulation system
and bleed off any system pressure.
Locate a point of injection beyond all pumps and filters or as determined by
the application.
2. A 1/4" or 1/2" Female NPT (FNPT) connection is required for installing the injection
fitting. If there is no FNPT fitting available, provide one by either tapping the pipe or
installing FNPT pipe tee fitting.
3. Wrap the Male NPT (MNPT) end of injection fitting with 2 or 3 turns of thread seal
tape. If necessary, trim the injection fitting quill as required to inject product directly
into flow of water.
More on next page
Trim Injection Fitting
Injection
Check Valve
Shut-Off Valve
1/4" or
1/2" FNPT
Reduction
Bushing
Typical Point of Injection
DO NOT use thread
seal tape on pump
tube threads.
DO NOT use pliers.

US and Canada 800.683.2378, International 904.641.1666 17
INSTALLATION continued
4. Hand tighten the injection fitting into the FNPT fitting.
0-25 psi Model (includes injection fitting)
a. Install connecting nut*and ferrule to the pump discharge line. Insert discharge
line into injection fitting until it reaches base of fitting.
b. Finger tighten connecting nut*to fitting.
26-100 psi Model (includes injection check valve)
a. Prior to connection, test injection check valve and NPT threads for leaks by
pressurizing system. If necessary, tighten an additional 1/4 turn.
b. Install connecting nut*and ferrule to the pump discharge line. Insert discharge
line into check valve body until it reaches base of body.
c. Finger tighten connecting nut*to fitting.
5. Turn pump on and re-pressurize system. Press and hold the PRIME button on the
keypad and allow the pump to fully prime. The Prime key will operate the pump at
100% but will not display 100% on the keypad. Observe chemical flow as actuated
by system and check all connections for leaks.
SVP1 Model
Use the manual mode of operation to set the metering pump to the desired speed
required for the application. This is the initial setting. Check the entire system for
leaks. Proceed to Step 6.
More on next page
* For 3/8" connections, insert discharge line until if reaches base of injection fitting (25 psi) or check valve body
(100 psi). If leak occurs, gradually tighten the 3/8” connecting nut as required.

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18
INSTALLATION continued
SVP4 Model
For automatic mode of operation, verify that the 4-20mA LED light is displayed on
the keypad. Provide the required signal for the automatic mode of operation. The
pump will respond to the 4-20mA input signal and pace accordingly. Proceed to
Step 6.
•4.0-4.7mA = OFF or 0% motor speed.
•4.8-19.9mA: the pump will operate in 1% increments every 0.16mA.
•Above 19.9mA the pump will operate at 100% motor speed.
•The pump’s minimum speed is 5% @ 4.8mA.
6. After suitable amount of dosing time, perform tests for desired chemical readings
(e.g., pH or ppm). If necessary, fine tune dosing or adjust solution strength.
The injection point and fitting require periodic maintenance to clean any
deposits or buildup. To allow quick access to the point of injection, Stenner
recommends the installation of shut-off valves.
5%
25%
50%
75%
100%
4.9 12 20 mA Input Signal
Feed Rate

US and Canada 800.683.2378, International 904.641.1666 19
TROUBLESHOOTING – MOTOR
HAZARDOUS VOLTAGE:
DISCONNECT power cord before removing motor cover for service. Electrical service
should be performed by trained personnel only.
KEYPAD/DISPLAY
PROBLEM POSSIBLE CAUSE SOLUTION
Display is blank No power cord connection point Check voltage of receptacle/controller
output voltage
Pump is off Press ON/OFF key
Failed power supply Check power supply; Green LED “ON” with
power applied
Check 12VDC output to board
No response to 4-20mA signal Not in “AUTOMATIC” Ensure display has a small LED light located
in upper left-hand corner indicating pump is
in “AUTOMATIC
Display reads “00” and does Pump is in “AUTOMATIC” mode Place pump in “MANUAL” mode
not respond when pressing of operation
up/down keys
DC MOTOR
PROBLEM POSSIBLE CAUSE SOLUTION
Display working; pump is not Worn motor brushes Inspect brushes for wear, replace if needed
Failed DC motor Replace DC gear motor if brushes are good
Pump cycles ON/OFF Failed DC fan Check fan operation; Replace as required

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20
TROUBLESHOOTING – PUMP HEAD
PROBLEM POSSIBLE CAUSE SOLUTION
Components cracking Chemical attack Check chemical compatibility
Pump head leaking Pump tube rupture Replace pump tube, ferrules; center tube
No pump output, Depleted solution tank Replenish solution
pump head rotates Pump suction line weight is Maintain suction line 2-3" above
above solution bottom of tank
Leak in the suction line Inspect or replace suction line
Ferrules installed incorrectly, Replace ferrules
missing or damaged
Injection point is clogged Inspect and clean injection point
Clogged suction/discharge line Clean and/or replace as needed
and/or injection check valve
Life of pump tube exhausted Replace pump tube, ferrules; center tube
Suction line is flush with Pull suction line approximately 1" from
the nose of the weighted strainer bottom of strainer, cut bottom of suction
tubing at an angle
Low pump output, Life of pump tube exhausted Replace pump tube, ferrules; center tube
pump head rotates Rollers worn or broken Replace roller assembly
Injection point is restricted Inspect and clean injection point
Incorrect tube size Replace tube with correct size
High system back pressure Verify system pressure against tube psi,
replace tube if needed
No pump output, Stripped roller assembly Replace roller assembly
pump head doesn’t rotate Motor problem Refer to motor section
Pump output high Incorrect tube size or setting Replace tube with correct size
Roller assembly broken Replace roller assembly