CircuPool® SJ-40 Classic Replacement Salt Cell
CircuPool® SJ-40 Classic Replacement Salt Cell

CircuPool® SJ-40 Classic Replacement Salt Cell

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Availability: In Stock.
Part Number: SJ40NR-RC
Genuine OEM Replacement Salt Cell for the first-generation CircuPool SJ40 Classic salt chlorine generator. Electrode only, housing not included.
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Quick Specs View Detailed Specs
Power: 1.6 lbs/day
3 Year Limited Warranty
10000 Hours Rated Lifespan
40000 Gallons Max Capacity

The CircuPool SJ-40 Classic replacement cell is compatible with all first generation SJ-Series Control Modules, except the SJ-55. The SJ-40 Classic salt cell is the factory original replacement cell model designed to easily drop in place and allow you to replace your old SJ-40 Classic cell in minutes. This cell is made to meet or exceed original factory specs and has 100% guaranteed compatibility.

Replacing the SJ-40 Classic cell will allow your salt chlorine generator to begin chlorinating again if your old SJ-40 Classic salt cell has been depleted. The SJ-40 Classic cell sanitizes your swimming pool in an eco-friendly and cost-efficient way, and also helps provide a luxurious swimming experience without the eye irritation and dry skin.


When replacing your SJ-40 Classic salt cell, take this opportunity to make sure it is sized correctly. Sizing your salt cell properly is key to making sure you will not need to supplement with additional chlorine or shock your pool, and also extends the lifespan of your cell. The industry recommends using a salt cell with a max capacity of 1.5-2 times the actual size of your pool (more is better). The SJ-40 Classic is manufacturer rated for a maximum capacity of 40,000 gallons.


This replacement salt cell for the SJ-40 Classic is 100% compatible with original systems (no software/firmware issues). The SJ-40 Classic cell has the same length, threading, and cable connection for direct replacement.

To get the most life out of your salt cell and to keep your pool running without unexpected interruptions, make sure it is sized correctly, maintain correct water balance, and be sure and inspect your cell at least every 3 months for leaks, debris, and calcium scale. Be sure to follow instructions in the product manual and clean the cell as often as the system indicates.


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Q: So there is no cord, right? I have to use existing cord, how is that done?

Asked by: Dale - 6/6/2018
A: This replacement cell includes the titanium electrodes as well as the cord. It only doesn't include the clear housing, as the original housing that came with the system is attached to your plumbing and does not need replacing.
Was this answer helpful?  3 of 3 Customer(s) found this Answer helpful.
Answer provided by: Discount Salt Pool (6/6/2018)

Q: I may need to replace my cell in my SJ-30. If I replace it with the pictured SJ-40 with the blue cap, here is my question. Does the old cell/sensor attach to the cap? Does the old cap pry off? If so, does the new cell attach to the old cap? Thanks for your help.

Asked by: Jeff - 7/23/2019
A: It would be a plug and play replacement. When you replace the cell, you'll unscrew your cell from the plumbing and unplug it's cable from the controls. The new cell has it's own threaded cap and new cable.
Was this answer helpful?  2 of 2 Customer(s) found this Answer helpful.
Answer provided by: Nathan (7/23/2019)

Q: Does the sj-40 have the same number of titanium plates as the sj-55

Asked by: Joel - 10/29/2022
A: No, the SJ55 has two more and uses a different power supply.
Was this answer helpful?  1 of 1 Customer(s) found this Answer helpful.
Answer provided by: Andrew (10/31/2022)

Q: the clear housing is leaking do you have a replacement for it?*=

Asked by: Rose - 7/6/2018
Was this answer helpful?  0 of 0 Customer(s) found this Answer helpful.
Answer provided by: Discount Salt Pool (7/10/2018)