Pentair IntelliChlor Plus40 vs. Hayward AquaTrol: Choosing the Right Salt System

Switching to a salt chlorine generator is one of those upgrades that truly changes how you feel about your pool. No more "chlorine smell," no more red-eyed kids, and—best of all—no more lugging heavy buckets of pucks from the store every week.

But when you start shopping, you’ll quickly notice two names dominating the conversation: Pentair and Hayward. Today, we’re looking at two specific heavy-hitters: the Pentair IntelliChlor Plus40 and the Hayward AquaTrol.

While they both turn salt into chlorine, they are built for very different backyard setups. Let’s break down which one belongs on your equipment pad.

1. The High-Performance Workhorse: Pentair IntelliChlor Plus40

The Pentair IntelliChlor Plus40 (523735-EC) is the "big brother" of the IntelliChlor family. It’s designed for in-ground pools and is famous for its "smart" capabilities and durability.

Why Pool Owners Love It:

• Massive Capacity: Rated for pools up to 40,000 gallons. Even if your pool is smaller (say, 20,000 gallons), "sizing up" to the Plus40 allows the cell to run at a lower output, which significantly extends the lifespan of the cell.
  
  
• Everything on the Cell: Unlike older systems with a separate wall box, the IntelliChlor puts the controls right on the unit. You can see salt levels, cell cleanliness, and output percentages with a quick glance at the LEDs.
  
  
• Modular Design: This new "Plus" model is more serviceable. If a sensor goes bad, you can replace just the sensor module instead of the whole unit, saving you a headache (and a paycheck) down the road.
  
  
• Automation Ready: It’s built to talk to Pentair automation systems. If you want to check your chlorine levels from your phone while on vacation, this is your system.

2. The Above-Ground Essential: Hayward AquaTrol (W3AQ-TROL-HP)

The Hayward AquaTrol is arguably one of the most popular salt system for above-ground pools in the world. It’s not just a chlorinator; it’s a complete control hub.

Why Above-Ground Owners Love It:

• The Built-in Timer: This is the game-changer. The AquaTrol control box includes a 24-hour timer that controls your pool pump. It ensures your salt cell only generates chlorine when the water is actually moving and saves you from buying a separate pump timer.
  
  
• Plug-and-Play Setup: The "HP" model is designed for DIYers. It comes with a standard 120V plug and all the fittings needed for both flexible hoses and rigid PVC pipe. You can often have this up and running in under 30 minutes.
  
  
• TurboCell Technology: It uses Hayward’s patented TurboCell, which is specifically designed to create that silky-soft water feel while being efficient for pools up to 18,000 gallons.
  
  

The Comparison: Side-by-Side

Which System Should You Choose?

Choose the Pentair IntelliChlor Plus40 if...

You have an in-ground pool and you want a professional-grade, high-output system. It’s the best choice if you already have (or plan to get) Pentair equipment like an IntelliFlo Variable Speed Pump, as they work together to keep your water perfect with almost zero effort.

Choose the Hayward AquaTrol if...

You have an above-ground pool and want to simplify your life. If you’re currently plugging your pump into a wall outlet and manually adding chlorine, the AquaTrol will automate your entire backyard in one afternoon. It’s reliable, affordable, and incredibly easy to use.

Ready to make the switch to salt? Both of these systems are industry leaders for a reason. If you still have questions about your specific plumbing or pool volume, we’re here to help.