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CircuPool RJ-20 PLUS Salt Chlorine Generator
CircuPool RJ20+ Saltwater Chlorinator System

CircuPool RJ-20 PLUS Salt Chlorine Generator

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Availability: In Stock.
Part Number: RJ20N
Retail Price:$1,495.00
You Save:$406.00(27%)
CircuPool RJ-20 PLUS, Complete Salt Pool System with 7-Year Limited Warranty, for up to 20,000 gallon pools
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Quick Specs View Detailed Specs
Power: 0.9 lbs/day
7 Year Limited Warranty
15000 Hours Rated Lifespan
20000 Gallons Max Capacity
2800 - 4500 ppm

The CircuPool RJ20 PLUS is an electronic saltwater chlorine generator with advanced, third-generation salt pool technology. RJ PLUS models feature electrolytic titanium cells with rare-earth minerals, providing an extended-lifespan cell (as much as 50% longer than other leading brands).

This chlorinator works with all existing pump and filtration systems to reliably supply the swimming pool with pure chlorine every single day! The RJ20 PLUS has a 20,000 gallons max capacity. The RJ PLUS series uses low salt levels and helps create a silky soft feeling in the pool water, for the ultimate swimming experience.

The complete RJ PLUS salt system from CircuPool features three main components: the Control Module, the Electrolytic Cell, and the Flow Switch, along with the usual miscellaneous hardware and documentation for install.

The RJ-PLUS Series will replace Hayward® Aqua Rite® systems with no cutting or gluing, making it a snap to upgrade your salt pool system!


  • USA Titanium Cell, with industry-leading 7-Year Limited Warranty.
  • 3rd-Generation system, combining the best in advanced technology with a reliable and proven track record.
  • Cell has industry-leading lifespan (as much as 50% longer lasting). Longer cell-life means even greater savings over the years.
  • CircuPool products are backed by USA-Based Expert Support & USA-Based Factory Warranty

*Please note CircuPool products are not affiliated with Hayward Industries, Inc. The use of such trademarks herein is for informational purposes only, and the product(s) are not those of Hayward Industries Inc., but rather are simply compatible with the referenced Hayward product.


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Q: what is the difference between SJ & the RJ systems?

Asked by: Bill - 3/6/2017
A: Great question. Beside the main differences in power and lifespan, here are a few of the things that set them apart once they are in your hands:

The SJ models are very simple, easy-to-use systems. They have status lights that verify the unit is working, tell you at what power level it is set, and whether you need to clean the cell or add salt to the pool. Because it is simple there is less to think about, it is particularly low maintenance (no acid is required to clean the cell), and it is also less expensive.

The RJ and RJ+ models are the flagship systems. They are more powerful and longer lasting. They have a digital screen and touch keypad, giving you more control and diagnostics. It displays the salinity level in real time, calculates the running average, displays the water temperature, and displays the electronic performance levels of the cell so you can see exactly how things are working. The power levels on the RJ models can be turned up and down in smaller increments. RJ models also synchronize more easily with variable-speed pumps if you plan to upgrade.

So the SJ gives you simplicity and a huge value, and the RJ gives you top of the line performance and control.
Was this answer helpful?  28 of 30 Customer(s) found this Answer helpful.
Answer provided by: Nathan (3/8/2017)

Q: You show a vertical install kit for the cell. Does the cell have to be installed vertically?

Asked by: David - 5/10/2017
A: No, the cell can be installed either horizontally or vertically. The kit just allows installation in tight plumbing situation.
Was this answer helpful?  14 of 15 Customer(s) found this Answer helpful.
Answer provided by: Nathan (5/10/2017)

Q: So when the time clock and pool are off, the control module shuts off too? Also my control module is mounted in direct sunlight and exposed to weather. Is the self contain unit ok or need to be in an additional inclosure? If I double the pool gallons to select the size of the generator is this enough?

Asked by: Scott - 9/27/2017
A: Yes, saltwater chlorinators are normally installed so they get turned on and off at the same time as the pump. This is outdoor equipment and you actually should not enclose it. And yes, if you select a saltwater chlorinator listed for twice the amount of water than your pool holds, that is a safe way to ensure you'll have enough sanitation power.
Was this answer helpful?  12 of 14 Customer(s) found this Answer helpful.
Answer provided by: Chris (9/27/2017)

Q: How long is the power cord on the cell?

Asked by: Floyd - 3/8/2017
A: The cord that goes from the Electrolytic Cell to the Control Module is approximately 14 feet in length.
Was this answer helpful?  7 of 9 Customer(s) found this Answer helpful.
Answer provided by: Jordan (3/8/2017)

Q: Does this unit run on 120 or 240 volts?

Asked by: Rick - 3/23/2017
A: This unit can work on either voltage. Most pools utilize 220V, so the default setting for this salt chlorinator is 220V, however instructions show you how to change the input power setting to 110V if that is what you need. For this equipment, there is no advantage to either voltage, you just want to match what your pump is using.
Was this answer helpful?  3 of 4 Customer(s) found this Answer helpful.
Answer provided by: Nathan (3/24/2017)

Q: The plug is a standard 3 prong plug, correct? I don't have PVC piping, new pool has filter hoses with clamps...can this SCG be adapted to this filter? Thanks!

Asked by: Linda - 5/4/2018
A: Salt systems power cords are going to come with just bare wires at the end, because people commonly just hook them up to a timer box. But if you are using a 110V outlet that is OK, you will just 1) set the salt system's control box to 110V (instructions in manual), and 2) put a plug on the end of the cord. You can get an outdoor plug like that to add cheaply from any hardware store. For your plumbing, you can use hoses and clamps, but you'll just need to get plumbing adapters from the hardware store that let you clamp on one side and make a glue connection on the other (the salt system's unions get glued).
Was this answer helpful?  3 of 4 Customer(s) found this Answer helpful.
Answer provided by: Nathan (5/4/2018)

Q: I currently have a Intellichlor IC-20 installed on my pool. Will the RJ30 be a good replacement choice?

Asked by: Ernie Smith - 4/22/2019
A: The RJ30 will give you significantly more power, which is always a big benefit. You'll like the controls much better, and replacement cells are cheaper too. Be sure to double check your pool size, but that will give you a lot of advantages.
Was this answer helpful?  3 of 3 Customer(s) found this Answer helpful.
Answer provided by: David (4/22/2019)

Q: I’m really want to know the with of the RJ-30 from the pipe ends for replacement. I’m replacing a Pentair 20 and was wondering what all I need to do? Thanks

Asked by: Topper - 5/31/2019
A: It's the same length cell, but your Pentair threaded unions aren't fully compatible. If you want to upgrade your system without having to replumb, take a look at the SJ-20 with its Pentair adapter kit. Otherwise the RJ20 is an excellent system to put in, I think it would be worth the little bit of work to plumb it in.
Was this answer helpful?  1 of 2 Customer(s) found this Answer helpful.
Answer provided by: Chris (5/31/2019)

Q: What is the length of the pipe I will need to cut out of my existing line

Asked by: Michael Longhi - 4/17/2020
A: For the most specific information, take a look at page 15 of the manual here:
Was this answer helpful?  1 of 1 Customer(s) found this Answer helpful.
Answer provided by: Nathan (4/17/2020)

Q: can this be used for an above ground pool ?

Asked by: Lthorpe - 4/20/2018
A: Yes, this model will work on above ground pools. It comes with both 2" and 1.5" plumbing unions to make things easy whichever size your pool uses.
Was this answer helpful?  0 of 1 Customer(s) found this Answer helpful.
Answer provided by: Brent (4/20/2018)