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A Guide to Your RainFlo Pump

The RainFlo MHP pumps are multistage horizontal pumps available in 

1/2, 3/4, and 11/2 horse power.  Manufactured with a solid construction and 

thick casings for an extraordinarily quiet and reliable operation, they are 

available in several GPM and PSI to meet a wide variety of applications 

requirements.

Optionally for added ease of use, the pump may be paired with an aux

-

iliary pump controller (RainFlo PC115A) for on/off functions and run-dry 

protection.  

Please Note:

This appliance is only intended for use by qualified persons.

TABLE OF CONTENTS

1. Diagram .............................................................2
2. Dimensions ........................................................2
3. Applications .......................................................2
4. Physical Characteristics ....................................3 
5. Operating Conditions .........................................3
6. Installation .........................................................3
7. Start Up and Operation......................................4

8. Performance Specifications

 ...............................4

9. Pump Curves .....................................................6

10. Performance Charts

 ........................................6

11. Maintenance ....................................................8
12. Troubleshooting ...............................................8

Summary of Contents for MHP50

Page 1: ...MHP50 MHP75 MHP150 USER MANUAL...

Page 2: ...It is the installer s responsibility to read understand and comply with these instructions...

Page 3: ...tions requirements Optionally for added ease of use the pump may be paired with an aux iliary pump controller RainFlo PC115A for on off functions and run dry protection Please Note This appliance is o...

Page 4: ...e intended for use in pumping circulating and boosting water industrial fluids and other weak chemical industrial mediums Rainwater harvesting systems Greywater systems Water treatment processes Water...

Page 5: ...n damage the product Before proceeding with installation make sure the unit shows no visible signs of damage Mounting Location The pump must be mounted in a horizontal orientation and must be mounted...

Page 6: ...ns should always be made by a qualified electrician Extra care should be taken to verify that all components are properly grounded NOTICE This pump must be primed prior to first use Priming Procedure...

Page 7: ...ure up to 45 PSI up to 45 PSI up to 45 PSI Inlet outlet size 1 FNPT 1 FNPT 1 FNPT 1 FNPT 1 FNPT 1 FNPT Weight 19 65 lbs 22 lbs 25 5 lbs Dimensions 15 75 L x 6 5 W x 9 H 15 75 L x 6 5 W x 9 H 16 L x 6...

Page 8: ...0 170 160 150 140 130 120 110 100 90 80 70 60 50 40 30 20 10 0 Hft RainFlo MHP50 RainFlo MHP75 RainFlo MHP150 10 PERFORMANCE CHARTS RainFlo MHP50 Performance Chart TDH PSI GPM 79 34 3 5 77 33 5 74 32...

Page 9: ...0 104 45 15 8 92 40 17 0 81 35 18 8 69 30 20 2 58 25 21 4 46 20 22 7 35 15 24 0 23 10 25 0 13 5 5 26 2 RainFlo MHP150 Performance Chart TDH PSI GPM 160 68 2 139 60 12 127 55 15 2 116 50 19 3 104 45 2...

Page 10: ...isn t too high Verify the suction head is in water Prime the pump The pump runs but no water Check the suction side intake connection and ensure it is not blocked or damaged If so clean or replace the...

Page 11: ...9...

Page 12: ...RainHarvest Systems RainHarvest com 800 654 9283 030524...

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