Quick verdict
When a salt chlorinator power center needs replacing, the part number 520556 is the one to match. Two listings currently present this part for in-ground pool and spa automatic control systems: the 520556 Salt Chlorinator Systems Power Center and the 520556 Salt Chlorinator Power Center for Pool and Spa. Both are listed at USD 155.49, both show the model 520556 and condition as new, and both are described as replacements for the same automatic control system models. From a specification standpoint, these listings are effectively the same product. The practical difference is in the way each description is written and the extra details included.
Where each listing wins
- The Systems Power Center listing explicitly calls out compatibility with the PC100 kit and the relevant models, and focuses on the unit's role in providing power and control communication. If you want the PC100 connection stated directly, this listing says it clearly.
- The Power Center for Pool and Spa listing is more structured, with fitment, function, installation, and material notes. It describes the unit's role with electrolytic cells and recommends professional installation. If you want a more detailed read on the replacement, this listing offers more context.
Comparison table
| Feature | Systems Power Center listing | Power Center for Pool and Spa listing |
|---|---|---|
| Price | USD 155.49 | USD 155.49 |
| Model / MPN | 520556 / 520556 | 520556 / 520556 |
| Condition | New | New |
| Compatibility mentioned | IC20, IC40, IC60, PC100 | IC20, IC40, IC60 |
| Installation guidance | Includes installation instructions | Includes installation instructions and recommends professional installation |
| Description style | Compact, centered on power and control communication | Structured fitment, function, installation, and material notes |
Product notes
520556 Salt Chlorinator Systems Power Center For Pool Spa Models IC20 IC40 IC60
This listing is a match for the 520556 power center replacement part. The description emphasizes the power center's job: keeping power and control communication flowing to the chlorination system, and it specifically mentions compatibility with the PC100 kit. That gives you a direct link if you're working with a PC100-based setup. Installation instructions are part of the description, and the unit is listed as new. The limitation is the brevity; you don't get the extra fitment, function, and material wording that the other listing includes, so if you're comparing details side by side, this one reads shorter.
520556 Salt Chlorinator Power Center For Pool and Spa IC20 IC40 IC60
This listing also covers the 520556 power center, and its description is organized into fitment, function, installation, and material notes. It states the replacement applies to the compatible IC-series systems, explains that the unit provides power and control communication for electrolytic cells to support consistent chlorine production, and includes installation instructions. The description adds that installation is not difficult but recommends it be done by a professional. It also mentions a stainless steel and corrosion-resistant coating in relation to the water tank pump body, which is extra context you won't see in the other listing. The trade-off is that some wording, like "control communication with the battery" and the pump body material note, feels less precise, so you'll need to weigh that added detail against the clearer phrasing in the first listing.
Final choice by use case
If you already know your system uses a PC100 kit and you want the compatibility stated in plain terms, the 520556 Salt Chlorinator Systems Power Center listing is the direct match. If you prefer a more detailed breakdown of the replacement, including fitment, installation guidance, and material notes, the 520556 Salt Chlorinator Power Center for Pool and Spa listing gives you more to read before ordering. Because the listed details are identical, the decision is really about which description you find more reassuring for your specific setup.
Both listings point to the same 520556 part, so there's no price advantage to chase. Choose based on the description style that feels clearer to you.
