How To Select a Proper Pool Chlorinator


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When choosing a chlorinator for your pool, several factors come into play before deciding which one is right for you. How big or small does my chlorinator need to be? How many tablets will it take? Will I need to re-plumb my line to fit the chlorinator in with my other systems? These questions, and many more, often make choosing a chlorinator more difficult than it actually is. This How-To-Guide will help you choose the best chlorinator for your pool.

Step by Step


Step 1

What type of pool do you have? Determine whether you need to buy a chlorinator for an above ground pool or an in-ground pool. Some chlorinators are designed for both. However, some are specifically designed.

Step 2

Next, determine the size of your pool. You will need to calculate the number of gallons your pool holds. The number of gallons helps determine how big or small the chlorinator needs to be to accurately keep your pool at safe levels. Click here to calculate the number of gallons in your pool. You should write this number down as it is helpful when choosing different equipment for your pool.

Step 3

Next, as a customer, you need to consider branding your pool. Not all chlorinators were created equal. Do your research on the different brands that are available to you. Choosing a more known brand sometimes ensures that replacement parts are more readily available and easier to find. Also, keep in mind some chlorinators offer a longer, more extensive warranty policy.

Step 4

When researching various brands, you need to consider any additional features the chlorinator may or may not have. Some chlorinators come with unions, while others require you to buy them separately. Another thing to pay attention to is the size of your plumbing. If you do not want to re-size your plumbing or buy additional fittings, you will need to buy a chlorinator that will match up with your existing equipment.

Step 5

Next, determine whether you need an inline or offline chlorinator. Ask yourself, do you have room to put the chlorinator in line with the rest of your pool equipment? Or, will I have to connect a bypass line to the plumbing for the chlorinator? Click here if you need help determining whether you need an inline or offline chlorinator for your pool.

Step 6

Finally, once you have selected your chlorinator, do not forget to double check the specifications. Make sure the chlorinator you chose is accurate for your type of pool. (in-ground or above ground) Ensure the size of your chlorinator will properly chlorinate your pool based on the number of gallons. Also, double check the pipe size to ensure no additional parts are needed for installation.


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 Posted: 9/16/2021 

How to determine what grams of salt chlorinator to use in a swimming pool?

InyoPools Product Specialist  Posted: 9/16/2021 

That amount of salt to be added to the pool depends on the desired salinity ppm, the current salinity ppm, and the pool size in gallons. We have this guide that helps you calculate the amount of salt required, but you will have to do the conversion from pounds to grams. Swimming Pool Salt Calculator

Anonymous  Posted: 7/6/2021 

I have a 14,000 gallon above ground pool. Can I use the Hayward CL100 or CL200? Or do I need to go with the CL200?

InyoPools Product Specialist  Posted: 7/14/2021 

The CL100 should be big enough for a pool your size. However, you may still go with the CL200. An advantage to going with the larger unit is you can go longer between chlorine loads.

Anonymous  Posted: 6/3/2020 

I have a 7200 gallon semi unground pool, would I be able to use Hayward CL200? Thank you

InyoPools Product Specialist  Posted: 10/23/2020 

Yes, a Hayward CL200 chlorinator would be fine for a pool that size.

 Posted: 2/16/2020 

It will be nice if your web-site further assist us to proceed to select one or two brand from your site. Thank you. Regards, Jeffrey.

InyoPools Product Specialist  Posted: 2/17/2020 

We would be glad to help. First, what is your application? Is this an inground or above ground pool? Second, do you want an offline or inline chlorinator?

InyoPools Product Specialist  Posted: 5/30/2017 

Anonymous (CL 500) - I do not see a CL 500 Chlorinator in our system or on the internet. I do see CL500 Chemical Analyzers but no chlorinators Here is a link to our current Chlorinators. See if one is comparable to yours.

 Posted: 5/29/2017 

i currently have a Hayward model CL 500 inline chlorinator and need to replace but cannot find this model number on your online page, do you still make this model number or has another model number replaced the CL 500?