The HS48 is designed for residences up to 5,000 square feet. For pipe sizes up to 2½” outside diameter.

 

The S38 is installed on spas, water heaters and appliances. For pipe sizes up to 2½” outside diameter.

 

More powerful HydroFLOW units are available for larger diameter pipes

 

How Does HydroFLOW Differ from other Electronic Water Conditioners?