Replacement 2 Port 5 Gear Module for Paramount Pool Products 2 Port Valve (Used to Control Paramount 12 Port Water Valve for Larger Pools). So if you have more than one water valve you would need this module.
If you have a small pool and only one Paramount water valve you would need a
2 Port 4 Gear Module. The 2 port 4 gear module does actually have 5 gears on the module yet the last gear is positioned slightly out of the row.
Replacement 2 Port 5 Gear Module for PCC 2000, Pool Valet, PV3, Cyclean, Vanquish, and Vantage In-Floor Cleaning Systems.