Griswold 811 User Manual (English)

Questions and Answers:

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Robert Allen Jr.Jul 31, 2025
Why is my Griswold 811 Water Pump noisy or vibrating?
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  Thomas DavisJul 31, 2025
  A Griswold Water Pump can be noisy or vibrate due to several reasons. It could be caused by improper alignment, which requires re-aligning the pump and driver. Other potential causes include a partial impeller clog or imbalance (remove obstruction), a broken or bent impeller or shaft (replace as necessary), a foundation that is not rigid (tighten hold-down bolts of base, pump, and motor, then recheck alignment), worn bearings (replace as necessary), suction and/or discharge piping not anchored correctly (review design, modify as necessary), or pump cavitation (review suction system, correct problem(s)).
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Maria HuberAug 4, 2025
What to do if Griswold Water Pump delivers no liquid?
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  Russell IbarraAug 4, 2025
  If your Griswold Water Pump isn't delivering liquid, several issues could be the cause. First, the pump might not be primed, so re-prime it and ensure the suction line is full of liquid. There might be an obstruction in the suction line or the impeller, so remove any obstructions. Also, check the rotation direction and change it if necessary, as incorrect rotation can cause severe damage. Ensure the foot valve or suction pipe has adequate submergence and correct any vortexing. Finally, the suction lift might be too high, so review and revise the level on the suction.
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Maria DonaldsonAug 9, 2025
Why Griswold 811 Water Pump requires excessive power?
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  John ChapmanAug 9, 2025
  Excessive power consumption in a Griswold Water Pump can stem from several factors. The actual head might be lower than the design, in which case you should throttle the discharge valve slightly, trim the impeller, and review the design. The liquid being pumped might be heavier than expected, so review the design. Also, check if the stuffing box packing is too tight and re-pack the pump if needed. Finally, rotating parts might be binding, so inspect the pump internals.
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cortezleahAug 13, 2025
What to do if Griswold 811 doesn't produce rated flow or head?
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  Steven VasquezAug 13, 2025
  If your Griswold Water Pump isn't achieving its rated flow or head, several factors could be responsible. Check for air leaks through the gasket (replace the gasket and tighten connections) or through the stuffing box (inspect packing/mechanical seal, add pressurized flush if necessary). The impeller might be partially clogged (remove obstruction), or there might be excessive impeller clearance (adjust impeller clearance). Insufficient suction head (review/revise design) or a worn or damaged impeller (inspect/replace as necessary) could also be the cause.
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oadamsAug 17, 2025
Why Griswold 811 Water Pump starts then stops pumping?
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  linda07Aug 17, 2025
  If your Griswold Water Pump starts but then stops pumping, it could be due to a few reasons. The pump may be improperly primed, so re-prime it. Air or vapor in the suction line could also be the problem, so review and revise the suction piping to eliminate air pockets. Finally, check for air leaks in the suction line and repair any leaks found.