CircuPool RJ45 Classic Replacement Cell (Electrode Only)
CircuPool RJ45 Classic Replacement Cell (Electrode Only)

CircuPool RJ45 Classic Replacement Cell (Electrode Only)

Part Number: RJ45C-RC-4Y
Availability: In Stock.
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Replacement cell for CircuPool RJ45 Classic
Power 1.9 lbs/day
Warranty 4 Year Limited
Max Capacity 45000 Gallons

The genuine OEM CircuPool RJ45 Classic replacement cell -electrode only- is up to 2x longer lasting than other off-brand generic cells. The CircuPool RJ-45 Classic replacement cell- electrode only- is compatible with original RJ-45 Classic Control Modules. For use with pools up to 45,000 gallons and easily replaces cells in existing plumbing without tools, electrode only, and excludes clear housing or cosmetic shell.

You may also wish to replace the o-rings at the same time you replace your cell with the RJ-Classic O-ring Set


General FAQ

Rating Snapshot

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Average Customer Ratings


Quality salt cell
In my experience they seem to last longer if you clean them quarterly. I use vinegar instead of the harsh muriatic acid. It takes longer but is easier on the metel.
Did you find this helpful?  4 of 5 Found Helpful
Reviewed by:  (Verified Buyer)  from Queen City, TX on 2/5/2017
I bought this as a replacement cell. Have for 3 weeks approx and seems to be doing a good job. Old celldid not last as long as it should have, but there was 40% warranty remaining plus a discount which really helped take the pain away. The warranty was suggested by all representatives which was a pleasant releif from the scratching and clawing required by other companies to substantiate a claim. Kudos for that.
Did you find this helpful?  3 of 4 Found Helpful
Reviewed by:  (Verified Buyer)  from Florida on 4/27/2017
When the system works correctly it is almost maintenance free for weeks at a time vs, daily with the chlorine system.
Did you find this helpful?  2 of 3 Found Helpful
Reviewed by:  (Verified Buyer)  from Santa Fe on 7/4/2017
At first I tried to get a replacement cell that was cheaper, what a mistake that was. Came back paid the price and the cell worked like a charm
Did you find this helpful?  1 of 2 Found Helpful
Reviewed by:  (Verified Buyer)  from Cinnaminson on 9/19/2017
Replacement cell
Ordered item CircuPool RJ45 Replacement Cell (Electrode only) Agent was exceptionally helpful and patient. Cell works perfectly. Would definitely use this company again.
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Reviewed by:  from Riverhead,NY on 7/8/2018
There are no reviews yet
Questions From Customers

Q: will this cell retrofit the SGS540 system?

Asked by: Kelley - 8/23/2018
A: Good question, it looks a little similar, but no, it isn't interchangeable and it wouldn't physically fit either. Give us a quick call and we'll help you figure out some good options - (866)766-5243
Was this answer helpful?  1 of 1 Customer(s) found this Answer helpful.
Answer provided by: Discount Salt Pool (8/23/2018)

Q: I have the Circupool RJ45 salt water generator (8 years) and need the new electrode, will this be plug and play?

Asked by: E - 9/21/2019
A: Yes, this is a direct replacement and can quickly be swapped with your old one.
Was this answer helpful?  1 of 1 Customer(s) found this Answer helpful.
Answer provided by: Darryl (9/23/2019)

Q: I have the RJ45 system that is about 8 years old. It turns on but does not generate chlorine unless I restart the system and select max. How do I determine if the electric cell is bad or the display control module?

Asked by: Roger - 7/5/2021
A: It sounds like you have a newer model and you are simply looking at the system's duty cycle (rest mode). If on the other hand you are seeing a warning light, that would indicate an error. Take a look at page 11 of this manual for more information:
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Answer provided by: Discount Salt Pool (7/5/2021)


  • Extended lifespan
  • Up to 2x Longer Life than generic replacements!
  • High-Output Electrolytic Cell
  • Easy DIY Installation, directly replaces your original cell with no cutting or gluing required.


Chlorine Output:

1.9 lbs/day

Manufacturer Warranty:

4 Year Limited

Manufacturer Max Capacity:

45,000 gallons

System Type:

Replacement Cell



Cord Length:


Warranty Penalty for Self-Install:


Weather / UV-Resistance:

Designed for Outdoor Installation and Operation

The CircuPool RJ-45 Classic cell is a titanium 7-blade cell that is fitted into a two-port clear plastic plumbing housing. The clear housing has threaded connections on the inlet and outlet, as well as threads around the existing internal cell, which allow for quick removal and replacement on existing plumbing unions.The clear cell makes it possible to see the chlorine generation and to more easily inspect the cell.

Manufacturer 4 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.