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Troubleshooting Pentair Lil’ Shark (FAQ’s)

Use our troubleshooting guide to help you with your Lil Shark automatic pool cleaner and to find answers to frequently asked questions.
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The Pentair Lil’ Shark Pool Cleaner comes equipped with everything you will need for a spotless pool. Simply connect to your pools skimmer and the Lil’ Shark effectively cleans vinyl surfaces automatically to reduce time spent on regular vacuuming.

It connects similar to a standard vacuum that most above ground pool owners use for manual cleaning. Bleeding the hose of all air, using a vacuum plate, and powering the vacuum through the filters pump, are all a part of the set up process.

When connected, its patented design transmits the vibration from the above ground pool filter system, through a special vacuum hose, and that vibration is then amplified by the specially designed vacuum head that moves about in a circular motion all while vacuuming. Once automatic cleaning is finished, you can use a pole to quickly run over missed spots or clean portions of the wall.

Pentair Lil Shark Automatic Pool Cleaner Tips

What should I do when the cleaner moves slowly or not at all?

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  • Backwash and clean filter. Empty all baskets.
  • Clear debris from oscillator or hose.
  • If hoses from pool to filter and pump are less than 1-1/2” diameter, replace with 1-1/2” diameter hoses.
  • Pump may be too small. Consult pool professional.
  • If your pool has a main drain (floor drain), close it during cleaner operation.

Why does the cleaner only clean the perimeter of pool?

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  • Make sure vacuum regulator is installed.
  • Set brush ring adjuster to a higher number.

Cleaner is hovering in one area with hose fully extended.

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  • Hose is too short. The hose should reach furthest point in pool plus one section.

Cleaner turns in clockwise circles only and only covers one section of pool.

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  • The cleaner is designed to move in a clockwise direction.
  • Set brush ring adjuster to a lower number.

Oscillator/cleaner runs too fast.

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  • Make sure vacuum regulator is installed. (the regulator marked “50” will reduce cleaner speed).
  • If your system has a return valve, gradually close it until oscillator runs at the desired speed.

Why is my hose coiling up?

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  • For best results, when hose is not in use, store it flat and straight and out of sun.
  • Hose is too long; remove sections as needed.

My cleaners do not cover the entire pool, how can I fix this?

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  • Any cleaner may miss spots. Spot clean pool by attaching a vac-pole (telepole) to cleaner and steering it.
  • Try different brush ring adjuster settings (0-4) until the cleaner gives the desired results.
  • The cleaner was not designed to work under all solar covers.
  • Strong winds may interfere with complete cleaner coverage due to hose movement.

Cleaner flips on its side when pump stops.

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  • This is normal if filter system develops a backpressure surge when the pump stops. The cleaner will right itself when system is restarted.

What should I do when my hose comes loose when pump stops?

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  • Use reducer cone in skimmer.
  • Ensure all connections are tight.

What makes my cleaner stick to pool bottom or pool main drain?

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  • Install diaphragm marked “50” in vacuum regulator.
  • Check inner brush ring for excessive wear.
Lil Shark Automatic Above Ground Pool Cleaner

The Pentair Lil Shark Pool Cleaner effectively cleans vinyl surfaces in flat or dish-bottom above ground pools. The Lil Shark Pool Cleaner installs in minutes without special tools or fittings.

Pentair Lil Shark

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