【Perfect Replacement:】This COM port expansion module is a direct replacement for the genuine Pentair 520818 part. It seamlessly integrates into your existing system, restoring full functionality to your pool and spa automation controls. 【Wide Compatibility】Designed specifically for Pentair IntelliTouch and EasyTouch pool and spa automatic control systems. It is also fully compatible with Pentair Compool to EasyTouch upgrade automation kits, making it a versatile solution for various setups. 【Reliable OEM Quality & Durability】Manufactured with high-quality materials and strict quality control to meet or exceed OEM standards. Ensures stable performance, corrosion resistance, and long-term reliability for your pool control system. 【Easy & Straightforward Installation】A true plug-and-play module. No complex programming or special tools required. Simply connect it to the designated port on your main control board to expand your system's communication capabilities. (For optimal safety, we recommend consulting your system's manual or a professional). 【Your Satisfaction is Guaranteed】We are confident in the quality and performance of our replacement module. Backed by our responsive customer support team and a comprehensive warranty, ensuring you a risk-free purchase and lasting peace of mind.

Pentair 520818 COM Port Expansion Module Replacement

Perfect Replacement: This COM port expansion module is a direct replacement for the genuine Pentair 520818 part. It seamlessly integrates into your existing system, restoring full functionality to your pool and spa automation controls.

Wide Compatibility: Designed specifically for Pentair IntelliTouch and EasyTouch pool and spa automatic control systems. It is also fully compatible with Pentair Compool to EasyTouch upgrade automation kits, making it a versatile solution for various setups.

Reliable OEM Quality & Durability: Manufactured with high-quality materials and strict quality control to meet or exceed OEM standards. Ensures stable performance, corrosion resistance, and long-term reliability for your pool control system.

Easy & Straightforward Installation: A true plug-and-play module. No complex programming or special tools required. Simply connect it to the designated port on your main control board to expand your system's communication capabilities. (For optimal safety, we recommend consulting your system's manual or a professional).

Your Satisfaction is Guaranteed: We are confident in the quality and performance of our replacement module. Backed by our responsive customer support team and a comprehensive warranty, ensuring you a risk-free purchase and lasting peace of mind.

Fits Pentair IntelliTouch EasyTouch Compool Upgrade Systems