GWS' sister company and manufacturing facility Flexcon Industries, Massachusetts, USA produces our Challenger™, C2Lite™ and FlowThru™ tanks with patented CAD2 single diaphragm and is responsible for sales in the USA, Canada and Mexico



GWS' sister company and manufacturing facility TankPac Industries, Taiwan produces PressureWave™, HydroGuard™, Max™, UltraMax™, M-Inox™, ThermoWave™, HeatWave™, SolarWave™, RO Wave™ with patented water connection and handles local OEM Reverse Osomosis Sales.


GWS associated company for Spain and Portugal



The Groundwater Foundation is dedicated to informing the public about one of our greatest hidden resources, groundwater. Through our programs and publications we show the benefits everyone receives from groundwater and the very real risks to groundwater. And, we make learning about groundwater fun and understandable for kids and adults.


The mission of the National Ground Water Association is to enhance the skills and credibility of all ground water professionals, develop and exchange industry knowledge and promote the ground water industry and understanding of ground water resources.


The Water Systems Council is a voluntary not-for-profit trade association whose members represent North American manufacturers and distributors in the water systems industry.


NSF International, The Public Health and Safety Company, a not-for-profit, non-governmental organization, is the world leader in standards development, product certification, education, and risk-management for public health and safety. For 60 years, NSF has been committed to public health, safety, and protection of the environment.