Inline Hayward Chlorinator 4.2 lb Capacity


MANUFACTURERHayward Pool Products

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Product Desciption

Automatic Chemical Feeders Efficient and maintenance-free, these durable, corrosion-proof auomatic chlorinators and brominators are ideal for new or existing pools or spas and work automatically with your pump and filter system.


  • Uses large or small slow dissolve tablets or sticks
  • Dial control valve lets you control and adjust the rate of feed
  • Easy-Lok™ threaded cover for safe and convenient access to add tablets or sticks
  • Unique finger-release catch provides extra security
  • Simple installation for do-it-yourselfers.
  • 1 year warranty
  • Please note: Unions are sold separately. If you do not have unions from a pre-existing CL100, you can purchase the Union Connector Kit.


  • Pipe Size: 1-1/2 in.
  • Dimensions: (W) 8-1/4 in. x (H) 15-1/4 in.
  • Weight: 30 lbs.

Flow Ratings: (GPM = Gallons Per Minute)
CL100 - Used with pumps with flow rating of 30-50 GPM
CL200 - Used with pumps with flow rating of 50-80 GPM
CL2002S - Used with pumps with flow rating of 50-90 GPM
CL110 - Used with pumps with flow rating of 30-50 GPM
CL220 - Used with pumps with flow rating of 50-90 GPM

Please note: the chlorinator pictured above is the Hayward CL200. The CL100 has a slightly different body style. For the CL100 diagram, click here.

Miscellaneous Notes

Note:Chemical feeders should always be installed after a pool heater.

CAUTION: Extreme care must be excerised when adding chemicals to your pool. Concentrated chemicals may react violently if they mix in the chemical feeder, causing a fire or explosion, which may result in PROPERTY DAMAGE, PERSONAL INJURY or DEATH.

CAUTION: Never use any petroleum based lubricants on cover O-Ring. Regular lubrication is necessary to allow for easy cover removal. Use non-petroleum based lubricants such as Jack's No. 327 lube or Ivory bar soap.

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Ask a Question

Asked on 05/15/2015 by

My CL 100/200 Chlorinator is not chlorinating my pool; this is the 3rd year of operation. I remove it every winter. Is there there a cleaning process?

Inyo Answer

Answered on 05/15/2015 by Product Specialist Lennox H.

The safest way to clean out a chlorinatior is to boil some water and pour it down the chlorinatior. If that doesn't solve your problem the check valve may need to be replaced.


Asked on 04/18/2013 by Guest

What union connectors are needed for the Hayward Chlorinator model # CL100?

Inyo Answer

Answered on 04/18/2013 by Product Specialist Patrick P.

The union connectors kit need for Hayward Chlorinator model # CL100, is part # SP1500UNPAK2.


Asked on 08/15/2012 by Guest

After two normal seasons of operating fine, all of a sudden the inside of my Hayward 300 chlorinator is turning black. What could be the cause of this? And what could I do to fix this?

Inyo Answer

Answered on 08/15/2012 by Product Specialist Patrick P.

If the water feels slightly greasy to the touch, it could mean that the chlorinator has turned black due to an excess of iron and manganese in the water. I would suggest checking the composition of your water at your local pool store or supply company. They should be able to tell you whether or not the pH and total alkalinity are in balance with one another.


Asked on 08/15/2012 by Guest

Can you use bromine tablets in the Hayward CL100 Inline Chlorinator?

Inyo Answer

Answered on 08/15/2012 by Product Specialist Patrick P.

Yes, you can use bromine tablets in the Hayward CL100.


Asked on 01/30/2012 by Guest

What is the difference between an inline and offline chlorinator?

Inyo Answer

Answered on 01/30/2012 by Product Specialist Patrick P.

An inline chlorinator would be plumbed directly inline with the plumbing.  For an existing pool, this would mean a section of pipe would need to be cut out to install the chlorinator.  An offline chlorinator attaches to existing plumbing by chlorinator tubing (holes would be drilled into existing pipe to attach the tubing.)


Asked on 11/21/2007 by Guest

How do I determine if the CL100 is the proper size chlorinator for my pool?

Inyo Answer

Answered on 11/21/2007 by Product Specialist Patrick P.

The Hayward CL100 or CL110 chlorinator will provide enough chlorine for up to 18,000 gallons of water.  If the volume of your pool is greater than this, you would need the CL200 or CL220 model which is for pools up to 40,000 gallons.  For pools above 40,000 gallons, you would use multiple chlorinators.  For example, if you have 60,000 gallons then you would use two CL200 or CL220 chlorinators.


Asked on 04/02/2007 by Guest

Does the in-line chlorinator come with a check valve, or must it be purchased separately?

Inyo Answer

Answered on 04/02/2007 by Product Specialist Patrick P.

No this does not come with the check valve. We would highly reccommend purchasing one of the check valves listed on this page 


Asked on 03/10/2007 by Guest

Is there a feedback mechanism that tells the unit the chlorine balance in the pool? Is this a way for me to automate addition of clorine to keep it always at the correct level? Or, just another place to put the tab aside from the the drain basket?

Inyo Answer

Answered on 03/10/2007 by Product Specialist Patrick P.

There is a dial on this unit which has a setting from 1-10 If you set the dial on 1 it will be letting the least amount of chlorine to the pool and if you have it set at 10 this would send the most amount of chlorine to the pool. So you can automate the feed of chlorine to the pool but you will still need to manually test your water. We do not recommend placing tablets in the skimmer basket because this high concentration of chlorine goes directly back to your pump and can cause corrosion to your pool equipment. If you do not go with the automatic chlorinator we would recommend at least going with one of our floating chlorinators so you do not damage your equipment you may view our floating chlorinators here 


Asked on 07/13/2006 by Guest

Can I use granular, or must I use 3" tablets or stick?

Inyo Answer

Answered on 07/13/2006 by Product Specialist Patrick P.

We recommend using tablets or sticks, and not to use granular with chlorinators.

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Hayward Chlorinator Manual (465.26 KB)

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