This kit allows you to upgrade your Pentair IntelliChem chemical controller system to use tank-mounted pumps for dispensing chemicals like acid or chlorine. Here's a breakdown:  

• Upgrade for IntelliChem: This kit is designed to work with Pentair's IntelliChem system, which automatically monitors and adjusts your pool's chemical balance.  
• Tank Mounted Pumps: The upgrade replaces older, separate chemical feed pumps with new pumps that mount directly on top of the chemical storage tanks. This can simplify installation and reduce the number of external components.  
• For Acid and Chlorine: The kit is compatible with both acid and chlorine tanks, allowing you to upgrade both dispensing systems.  
• Complete Pump Assembly: The kit includes the complete pump assembly needed for the upgrade.
• Compatibility: It's important to note that this kit may require a separate controller upgrade (Pentair part number 522478Z) if you have an older IntelliChem system.

In summary, the Pentair 522474 Tank Mounted Pump Upgrade Kit is a convenient way to modernize your IntelliChem chemical automation system. By switching to tank-mounted pumps, you can potentially simplify your setup and improve the efficiency of your chemical dispensing.