© 2014 MDM INC.
Economy With Efficiency.
© 2014 MDM INC.
Economy With Efficiency.
© 2014 MDM INC.
Economy With Efficiency.
Proudly Made in the USA
Proudly Made in the USA
INSTALLATION AND SERVICE MANUAL
TYPE:
STRAIGHT CENTRIFUGAL
MOTOR:
INDUSTRIAL DUTY 1/8 HP,
1 PHASE, TEFC, 1550 RPM,
115 VAC MOTOR,
8 FT 3-PRONGED CORD.
INLET:
2” FNPT
DISCHARGE:
1-1/2” FNPT
MATERIAL:
40% GLASS FILLED POLYPROPYLENE
WITH NORYL IMPELLER
HARDWARE:
STAINLESS STEEL
ACCESORIES:
90 CUBIC INCH STRAINER BASKETS (1.5” & 2”)
SWING CHECK VALVES (1.5”, 2”, 3”)
WARNING:
Please read completely before you install or operate your new pump! This is an external “out-of-pond” pump!
It is NOT submersible! Do NOT allow this pump to become submerged! Never run dry! Max. case pressure.- 25 PSI!
MAINTENANCE WARNING: EYE PROTECTION IS STRONGLY RECOMMENDED
Lubrication
Motor - Permanently Lubricated ball bearings - no service required.
Rotary Seal - Requires no lubrication after assembly.
Symptom
Problem
Resolution
No Flow
Insufficient Prime
Prime system with water and purge all air from suction piping.
Install check valve.
Insufficient Power
Verify power supply and connection from panel to pump.
Verify proper voltage. Some models are dual voltage (115/230).
Flow Restriction
Ensure valves are open.
Ensure plumbing is clear, including suction strainers, check valves, etc.
Verify check valve orientation and direction of permitted flow.
Clean out leaves or other debris from basket strainer (if applicable).
Air leak
Fix air leaks at fittings, connections, strainer basket etc. This typically occurs on the intake side.
System Incompatibility
Verify hydraulic compatibility: i.e. pump & pipe are sized for the system.
Low Flow
Air leak
Fix air leaks at fittings, connections, strainer basket etc. This typically occurs on the intake side.
System Incompatibility
Verify hydraulic compatibility: i.e. pump & pipe are sized for the system.
Insufficient Power
Verify power supply and connection from panel to pump.
Verify proper voltage. Some models are dual voltage (115/230).
Flow Restriction
Ensure valves are open.
Ensure plumbing is clear, including suction strainers, check valves, etc.
Clean out leaves or other debris from basket strainer (if applicable).
Insufficient Prime
Prime system with water and purge all air from suction piping.
Cavitation
Verify airtight plumbing on the suction plumbing especially fittings!
Clean out leaves or other debris from basket strainer (if applicable).
Increase pipe size where possible.
Decrease suction pipe length, reduce the number of elbows, etc.
Verify hydraulic compatibility: i.e. pump and pipe are sized for the system.
Sporadic Operation
Insufficient Power
Verify power supply and connection from panel to pump.
Verify proper voltage. Some models are dual voltage (115/230).
Poor Ventilation
Ensure adequate aiflow over motor to prevent overheating.
Excessive Noise
Cavitation
Verify airtight plumbing on the suction plumbing especially fittings!
Clean out leaves or other debris from basket strainer (if applicable).
Increase pipe size where possible.
Decrease suction pipe length, reduce the number of elbows, etc.
Verify hydraulic compatibility: i.e. pump and pipe are sized for the system.
Insufficient Power
Verify power supply and connection from panel to pump.
Verify proper voltage. Some models are dual voltage (115/230).
Flow Restriction
Ensure valves are open.
Ensure plumbing is clear, including suction strainers, check valves, etc.
Verify check valve orientation and direction of permitted flow.
Please fill in for future reference:
MODEL: ___________________________
SERIAL NUMBER: ____________________
DATE PURCHASED: ___________________
* Please fill out the warranty registration card
included with this product or online at
www.mdminc.com
S/N: XXXX-XXXXXX
Gasgacinch® is a registered trademark of Porter Manufacturing. Noryl® is a registered
trademark of the General Electric Company. Teflon® is a registered trademark of DuPont
Company. ValuFlo is a registered trademark of MDM Incorporated.
Valuflo 750 Installation Manual.indd Adobe Indesign CC 06-06-14
ValuFlo
750
ValuFlo
750
ValuFlo
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*The pump must be drained before servicing or if stored below freezing
temperatures. Periodic replacement of seals may be required due to normal
carbon wear.
MDM INCORPORATED
3345 N. Cascade Ave • Colorado Springs, CO • 80907
Toll Free Phone (800) 447-8342 • Fax (866) 425-1346
www.mdminc.com • [email protected]
