Pentair ONGA FARMMASTER JJ Series

Questions and Answers

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Summer PriceAug 11, 2025
What to do if Pentair ONGA FARMMASTER JJ will not prime?
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  Lisa WhiteAug 11, 2025
  If your Pentair Water Pump won't prime: * Inspect the foot valve for leaks and repair or replace if necessary. * Examine the suction line for humps. A pump professional can prime the pump with an engine drive pump to remove air. * Have a pump professional re-evaluate the site for pressure and flow requirements to select the correct injector. * Ensure the suction is submerged in the water source. * Have a pump professional reset the pressure switch settings, if they are too low.
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Douglas CastroAug 19, 2025
How to fix a Pentair Water Pump leaking from casing and motor?
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  Yolanda GilbertAug 19, 2025
  If your Pentair Water Pump is leaking between the casing and motor, switch off the power. Then, loosen the casing bolts, check the alignment and condition of the casing o’ring, and retighten the bolts. If the leak persists, replace the o’ring and the mechanical seal.
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Ralph JonesSep 2, 2025
Why is my Pentair ONGA FARMMASTER JJ experiencing rapid cycling?
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  John NelsonSep 2, 2025
  If your Pentair Water Pump is experiencing rapid cycling, consider these solutions: 1. Install a larger capacity or secondary pressure tank. 2. Check the pressure tank's air charge using a tire gauge and adjust it to 10% below the pump's cut-in pressure. 3. Have a professional adjust the pressure switch and tank pressure accordingly. 4. Consult a pump professional to determine if the pump injector combination is too large for the application.
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Gwendolyn WilsonNov 25, 2025
What to do if my Pentair ONGA FARMMASTER JJ Water Pump has failure or reduced capacity?
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  amanda32Nov 25, 2025
  To address pump failure, reduced capacity, or discharge pressure issues with your Pentair Water Pump: * Ensure the pump is primed and the casing is full of water. * Check for and eliminate any leaks in the suction piping. * Verify the suction pipe inlet is sufficiently submerged to prevent air intake. * Inspect the impeller for clogs (this should be done by qualified personnel). * Examine the impeller and diffuser for wear; consult a qualified technician if needed. * Confirm the pump isn't trying to push water too high; a higher head pump may be necessary. * Test the power outlet with a known working appliance. * Inspect and replace the fuse if it's blown. * Adjust the gate valve on the discharge to raise pressure above the injector's minimum if cavitation is occurring. ...

Pentair ONGA FARMMASTER JJ Series Specifications

General

Category	Water Pump
Brand	Pentair ONGA
Model	FARMMASTER JJ Series
Type	Centrifugal Pump
Power Source	Electric
Material	Cast Iron
Application	Agricultural, Irrigation
Usage	Irrigation, Water Transfer