How To Assemble a Pentair Lil Shark AG Pool Cleaner.


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This guide shows you how to assemble and install a Pentair Lil Shark pool cleaner in your above ground pool.

Click here to view the Lil Shark pool cleaner. 

Step by Step


Step 1

CHECK PARTS - This picture shows the parts you should have received to install your Pentair Lil Shark Suction Cleaner in your above ground pool: 1 - AUTOMATIC VACUUM REGULATOR BODY; 2 -  AUTOMATIC VACUUM REGULATOR DIAPHRAGM; 3 -  AUTOMATIC VACUUM REGULATOR GUARD; 4 - FLOW DIRECTOR; 5 - LIL SHARK BODY; 6 - REDUCER CONE; 7 - SWIVEL ASSEMBLY

Click here to view the automatic vacuum regulator diaphragm. 

Click here to view the flow director. 

Click here to view the reducer cone. 

Click here to view the swivel assembly. 

Step 2

STRAIGHTEN HOSES - Remove the hoses from the box and lay them out in the sun straight to remove the coils.

Step 3

ATTACH SWIVEL ASSEMBLY - Insert the Swivel Assembly into the top of the Cleaner Body and rotate it 1/4 turn to lock it in place.

Step 4

SET BRUSH RING ADJUSTER - Set the Brush Ring Adjuster to "0".

Step 5

ATTACH HOSE - Slide the cuff of the long Hose over the end of the Swivel Assembly. You Lil Shark comes with three lengths of hose; 20', 8', and 2'. Your hose should be 5' to 8' longer than the full length of your pool.

Click here to view the Lil Shark pool cleaner. 

Step 6

VIEW DIAPHRAGMS - Two black rubber Diaphragms are provided with your Cleaner; one labeled "50" and the other "60". Attaching "50" on the Automatic Vacuum Regulator will cause the Cleaner to run slower that using "60".

Step 7

ATTACH "60" DIAPHRAGM - Slide the "60" Diaphragm over the side port of the Automatic Vacuum Regulator.

Step 8

ATTACH DIAPHRAGM GUARD - Place the guard over the end of the side port and twist it over in place over the Diaphragm. This guard is a safety feature to prevent accidental suction of people at the Diaphragm.

Step 9

ATTACH THE REDUCER CONE - Slide the Reducer Cone onto the bottom of the Automatic Vacuum Regulator. The Reducer Cone keeps the hose in place at the bottom of the skimmer.

Click here to view the Lil Shark pool cleaner. 

Step 10

ATTACH HOSE TO REGULATOR - Slide the other end of the hose over the end of the Automatic Vacuum Regulator.

Step 11

SUBMERGE CLEANER - Turn Cleaner upside down and submerge the Cleaner and hose until both are filled with water.

Step 12

ATTACH HOSE TO SKIMMER - With the pump off, push the Reducer Cone attached to the Regulator into the port at the bottom of the Skimmer.

Step 14

ADUST BRUSH RING ADJUSTOR - Change the setting of the Brush Ring Adjustor for best performance: "0" provides largest circles of operation; "4" provides tightest.


(1 to 16 of 16)

 Posted: 10/11/2019 

Mine worked for about 2 times and now it doesn't move or suction. Complete garbage. Waste of 150 bucks. Not happy at all.

InyoPools Product Specialist  Posted: 8/8/2016 

Lil Shark - See our guides on "How To Maintain a Pentair Lil Shark AG Pool Cleaner" and "How To Replace a Pentair Lil Shark AG Pool Cleaner Oscillator" for possible fixes. Also, you may have a low water pressure problem. See our guide on "How to Correct Low Water Pressure in Your Pool System". A clogged pump impeller is a common problem.

Anonymous  Posted: 8/5/2016 

Mine just stopped working yesterday! Is there anything I can do to fix it?

InyoPools Product Specialist  Posted: 7/2/2016 

karen - No, the flow director is often be left out. It only helps direct the flow of water to make the cleaner more efficient.

 Posted: 7/1/2016 

Part # 4 Flow Director - Is it a must to use this part in order for the shark cleaner to work?

InyoPools Product Specialist  Posted: 4/20/2016 

Roberta - The original Lil Shark has been replaced by this newer redesigned Pentair Lil Shark.

 Posted: 4/19/2016 

Where can I find this type of vacuum for my pool I had one but it broke

Anonymous  Posted: 7/18/2015 

I just got mine in and I love it

InyoPools Product Specialist  Posted: 6/6/2015 

Ks - The Flow Director replaces the nozzle on your pool input return port so that you can direct the water flow downward. Not all return ports are adaptable.

 Posted: 6/5/2015 

Where does the flow director go??

InyoPools Product Specialist  Posted: 4/23/2014 

fullcount13 - A skimmer plate should work as long as it and the hose connection are placed below the surface of the water. Otherwise the hose will be sucking air into the system. And no, you don't have to have a return hose jet but they do increase pool circulation.

 Posted: 4/22/2014 

When we moved into our house, the people that were here left the cleaner head for the pool but I'm not sure they left all the parts to it. If I have one of the attachments that the hose hooks to and seals down over the entire opening of the skimmer will this work instead of using the cone at the bottom of the skimmer? And two, I don't think I have the part that directs the jet of water coming out of the return either. Will this be necessary to run the vacuum?

Thanks for your help


InyoPools Product Specialist  Posted: 8/17/2013 

Jerry - The Flow Director replaces the nozzle on your pool input return port so that you can direct the water flow downward. Not all return ports are adaptable.

 Posted: 8/16/2013 

Where do u put the flow director at

InyoPools Product Specialist  Posted: 8/2/2013 

attaching cleaner - Yes you can attach your cleaner directly to the pump. It's no different than coming through the skimmer pressure wise. You could put a "T" fitting on the line to your pump with a ball valve to shut the "T" off when you didn't want to use the cleaner.

Anonymous  Posted: 8/1/2013 

My pool doesn't have a place to attach the hose in the skimmer area. Can I attach it directly to the pump?