Click for SJ55 $10 More
CircuPool SJ-45 Salt Chlorine Generator
CircuPool SJ45 Saltwater Chlorinator System

CircuPool SJ-45 Salt Chlorine Generator

Part Number: SJ45A
Availability: In Stock.
0 Add to Cart
Begin Checkout
CircuPool SJ45, Complete Salt Pool System with 3-Year Limited Warranty, for up to 45,000 gallon pools
Power 1.9 lbs/day
Warranty 3 Year Limited
Rated Lifespan 10000 Hours
Max Capacity 45000 Gallons
Does not require acid to clean the cell!

The CircuPool SJ-45 saltwater chlorine generator provides simple worry-free operation and industry-leading value. The Circupool SJ-45 salt chlorine generator works with existing pump and filtration systems to reliably supply swimming pools with pure chlorine every day.

Additionally, the CircuPool SJ-45 salt water pool chlorine generator works at a low salt level and creates a silky soft feeling in pool water to provide the ultimate swimming experience. The maximum capacity that the CircuPool SJ- 45 salt chlorine generator can withstand is 45,000 gallons.

If you are switching from an AquaRite or IntelliChlor© model, the CircuPool SJ-45 salt chlorine generator offers a DIY adapter kit that allows for a simple and fast conversion.

The complete 2nd-Generation CircuPool SJ-45 salt water chlorine generator has three main components:

  • The Control Module
  • The Electrolytic Cell
  • The Flow Switch

Aside from the main components, it also includes miscellaneous hardware, cleaning tools, and documentation.

The CircuPool SJ- 45 salt chlorine generator is incredibly easy to maintain with no acid necessary for cleaning the cell. This salt chlorine system provides simple, reliable, and proven sanitation and beautiful water.


  • Clear Titanium Cell, with a leading 3-Year Limited Warranty.
  • Simple, reliable, and proven. Monitors performance and system status, while operating on the widest salinity range available.
  • Incredibly easy maintenance! No acid necessary for cleaning the cell.
  • CircuPool products are backed by USA-Based Expert Support & USA-Based Factory Warranty


General FAQ

Rating Snapshot

Select a row below to filter reviews.

Average Customer Ratings


best things for my home
This has been running for a while and I can say this is one of the best things for my home I've bought. It has made everything so much nicer and I went from having to mess with my pool almost every other day to basically nothing. I just wish I would have done this years ago.
Did you find this helpful?  30 of 34 Found Helpful
Reviewed by:  (Verified Buyer)  from Spring, TX on 3/29/2017
SJ40 Salt Chlorine Generator
Works as directed and fast. Just put salt in my pool and after 2 runs of my pump my chlorine level is up to par. Tip; measure exactly how many gallons your pool contains before pouring in the salt per directions. I put in too much salt because I kind of guessed the gallons. My bad; had to drain the pool a bit and refill it.You can double check the salt level with Lesley's or other pool stores for free. The sale was a great deal; saved me $150,- compared with
Did you find this helpful?  17 of 20 Found Helpful
Reviewed by:  (Verified Buyer)  from Cathedral City on 3/29/2017
Relatively easy
Installation was relatively easy. I really like the clear plastic around the salt cell, which allows for a visual inspection of the titanium plates. I would point out there is no digital read-out on the control panel that tells me ppm of salt, which my previous unit had. I will plan to buy a hand-held electronic device to test salinity with. However, it does let you know when the salinity level is no longer in range, and since its salinity operating range is so broad, maybe it doesn't really matter like on the old ones.
Did you find this helpful?  16 of 19 Found Helpful
Reviewed by:  (Verified Buyer)  from Hattiesburg, MS on 3/28/2017
new system
The generator unit has been keeping the pool clean so no complaints. Wish it told you more specifics, how do I know my salt level isn't too high or low?
Did you find this helpful?  16 of 22 Found Helpful
Reviewed by:  (Verified Buyer)  from Slidell, LA on 11/6/2016
My pool company wanted more than what I paid for this for just the REPLACEMENT CELL!! I like this even better now.
Did you find this helpful?  14 of 18 Found Helpful
Reviewed by:  (Verified Buyer)  from Escondido, CA on 3/1/2017
There are no reviews yet
Questions From Customers

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?  56 of 59 Customer(s) found this Answer helpful.
Answer provided by: Nathan (3/8/2017)

Q: If I install the SJ-40 system myself will it affect the warranty. ?

Asked by: derek - 7/1/2017
A: No, unlike some other brands there is no warranty penalty for self installations.
Was this answer helpful?  16 of 17 Customer(s) found this Answer helpful.
Answer provided by: Discount Salt Pool (7/1/2017)

Q: We have a 22,000 gallons pool- do we choose SJ20 or SJ40?

Asked by: Philip - 6/21/2017
A: You always want to have plenty of extra capacity, so the SJ40. You can always go bigger as well. Here is a little more info about system sizing:
Was this answer helpful?  9 of 11 Customer(s) found this Answer helpful.
Answer provided by: Nathan (6/22/2017)

Q: Does the SJ40 have a built in timer?

Asked by: Dave - 5/18/2017
A: No, like most systems it is designed to be hooked up to the same circuit as the pump so they turn on and off together, which for most people means an existing external timer, pool controller, or switch. You can get a timer cheap at the hardware store if needed.
Was this answer helpful?  8 of 9 Customer(s) found this Answer helpful.
Answer provided by: Tim (5/18/2017)

Q: I have an above ground pool and my pump uses 110v power, will this work for me?

Asked by: Linda - 3/27/2017
A: Yes, this system can work with either 220v or 110v power. It is set at the factory to accept 220v, which is most common for pools. However, it is made so you can easily change it to accept 110v by following the printed directions. Unlike a motor, it won't work any better or worse on either voltage, you only want to match what your pump uses so they can work on the same circuit together.
Was this answer helpful?  6 of 7 Customer(s) found this Answer helpful.
Answer provided by: Tom (3/27/2017)

Q: I have a variable speed pump and I am concerned about the minimum flow rate required for this unit. Does this unit have a flow rate sensor that shuts the unit off if the flow rate is below 30gpm? I'm not sure what my flow rate is at low RPM, but I want to make sure this unit will operate.

Asked by: Ken - 12/21/2017
A: To use this model with a variable speed pump, you would want to put it on a timer and coordinate it's run time with the pumps programmed schedule. Alternatively, you may want to look at the RJ-Series models, which use a flow switch that makes it more simple to use with a variable speed pump.
Was this answer helpful?  5 of 7 Customer(s) found this Answer helpful.
Answer provided by: Tim (12/22/2017)

Q: What is the center to center distance on the vertical inlet and outlet fittings? (looking to replace ESC 36)

Asked by: Profkanz - 8/31/2017
A: For the SJ-Series, the center to center distance of the ports of the Cell Housing are approximately 5 ½" apart.
Was this answer helpful?  4 of 5 Customer(s) found this Answer helpful.
Answer provided by: Discount Salt Pool (9/1/2017)

Q: Does the SJ40 have a built in timer?

Asked by: Dave - 5/18/2017
A: 15 Amp timers can be found cheap at the hardware store. However, if your pump uses 15 amps or more, you will need to find a 20 amp or larger timer. Those are not so cheap at the hardware store. I found a 20 amp day/night timer for a reasonable price $35 online. It allows you to divide the time the pump is on between day and night (2/4/6/8/10 or 12 hours for day and night) so that the water doesn't sit still so long.
Was this answer helpful?  3 of 4 Customer(s) found this Answer helpful.
Answer provided by: Brian (8/2/2017)

Q: What all pool pumps is this salt generator compatible with?

Asked by: jessica - 6/16/2017
A: Saltwater chlorine generators are typically able to work with whatever model pool pump and filter system you already have! You simply add this in addition to your other equipment, after the existing pump and filter in the return plumbing line.
Was this answer helpful?  3 of 4 Customer(s) found this Answer helpful.
Answer provided by: Kevin (6/16/2017)

Q: Does this product connect with existing plumbing to replace a compupool cpsc36 without having to redo plumbing or use an adapter kit?

Asked by: KC - 9/17/2017
A: The CircuPool SJ models look similar, but they are actually different enough in shape that it wouldn't directly connect to a Compu Pool CPSC model. However, you CAN connect a CircuPool RJ model to your old CPSC unions using the available Vertical Installation Kit, which makes things very easy. You can see that here:
Was this answer helpful?  1 of 2 Customer(s) found this Answer helpful.
Answer provided by: Discount Salt Pool (9/18/2017)

Chlorine Output:

1.9 lbs /day

Manufacturer Warranty:

3 Years Limited*

Manufacturer Rated Lifespan

10,000 hours

Manufacturer Max Capacity:

45,000 gallons


Digital - LED Indicators

Salinity Range:

3000-4000 ppm

Salinity Test:

Yes - Low (No Maximum)


Yes, Reverse Polarity

Warranty Penalty for Self-Install:


Clear Cell:


Boost Mode:

Yes, 24 hours

Winter Mode:


Flow Sensor:

Yes, Independent Flow Switch

O-Rings Included:


Unions Included:


Union Size:

1.5" & 2”

Power Cord Length:


Cell Cord Length:


Cable Connection Type:



22 lbs

Rated Amperage (120V/240V):

1.667A / 0.833A

Weather / UV-Resistance:

Designed for Outdoor Installation and Operation

The CircuPool SJ-45 system is controlled by the Control Module. Featuring a convenient medium size, molded-plastic exterior with a touch keypad and LED indicators to monitor settings and performance.

The control module mounts conveniently on most walls, posts, or supports. Just follow the accompanying instructions and mounting template for screw placements and installation.

The digital LED indicators on your control module will communicate whether or not your system is operating at optimum performance levels, and will otherwise alert you with its LED indicators for potential service issues such as: the pool's salt level is low, the cell needs cleaning, there is insufficient water flow, or it the water has reached winter temperatures. Keypad controls will also give you the ability to increase or decrease chlorine output, or activate a boost (or SuperCL) mode.

For the cell component of your CircuPool SJ-45 unit, it comes equipped with an SJ-45 electrolytic cell in a clear, raised housing. This contains a set of titanium electrode plates that can be removed, as well as a built-in power supply cord.

Thanks to its unique design, the SJ-45 has a reduced need for cleaning mineral deposits that may occur, which makes it one of the few systems that do not require acid for cell cleaning. You can easily remove the mineral deposits with the cleaning wand included in your system’s kit!

This cell also features threaded connections near the head of the cell, so you can quickly access the titanium plates whenever you need to service them, or if you need to take them out for winter. The cell comes with both 2” and 1.5” unions to easily connect to existing return-line PVC plumbing. The clear housing on the cell makes it easy to inspect for both cleaning and function purposes!

Included in the CircuPool SJ-45 parts kit is an instruction manual, 2" and 1.5" plumbing unions, o-rings, mounting hardware, flow switch, and cleaning wand.
Manufacturer 3 Year Limited Warranty for residential use. Most manufacturer chlorine generator warranties are pro-rated. All warranties offered are provided by the relative manufacturer and are limited to the terms and proration they provide. See manufacturer's documentation for a full description of warranty terms and conditions.