Pentair Com Port Expansion Module | 520818 Unions Enhance the performance of your

Enhance the performance of your Polaris pool cleaner with the Pentair Hex Bagged Wheel Bearing

bright appearance without causing damage to the vinyl material

Optimize your motor and pump control systems with the Intermatic 143T145A DPST (Double Pole Single Throw) Relay

Adjustable return wall/floor inlet fitting for in-ground concrete or gunite pools

Reliable and accurate calcium hardness testing results

Pentair Com Port Expansion Module | 520818 Unions Enhance the performance of yourPentair Serial COM Port Expansion Board Kit (Adds RS 485 Communication Ports) 520818 The Pentair 520818 is a Serial COM Port Expansion Board kit used to add additional RS 485 communication ports to compatible Pentair pool spa automation systems. Its commonly installed when you need more connection points for equipment such as variable speed pumps, salt systems, heaters, or other RS 485 devices that communicate with the control panel. Key Features Adds