About Verder

Verderflex Dura Hose Pumps Certified to NSF61

Verderflex has attained the coveted NSF 61 certification on the complete range of Dura hose pumps. Engineers and utilities now have access to the largest range of pump sizes and flow rates, all fully certified to NSF 61 for all water treatment chemicals.

Pump with confidence that your most critical processes are safe and certified

The Verderflex Dura range of NSF 61 certified pumps consists of nine models, Dura 5 for very low flows of 0.20 gph and pressures exceeding 120 psi, up to the Dura 65, a 2.5” pump with continuous flow up to 95 gpm and intermittent flow to 145 gpm.

The very nature of treating water and wastewater is anything but typical; any number of factors and conditions can upset the process at a moment’s notice. That’s why we have certified our pumps with the ‘Maximum Use Level’ of chemical concentrations. Other metering pumps have attained NSF 61 certification using the ‘Typical Use Level’ of chemical concentration. This means that using concentrations outside of the ‘typical’ range will invalidate the NSF 61 certification, adding uncertainty to the safety of your process.

Within any hose pump there are two contact materials: the hose and the flange inserts. Both of these items must be tested and certified. Verderflex’ certification which may be viewed here and includes both the hose and insert material used in the certification testing. When selecting an NSF 61 approved pump, be sure to check the certification to be assured that all wetted materials are listed.

More from NSF: NSF/ANSI 61 is the legally recognized national standard in the United States for the human health effects assessment of drinking water contact materials, components, and devices. This standard forms the basis of the regulatory framework and of public health protection for controlling the health effects of drinking water contact materials across the USA and Canada. Forty-eight U.S. states currently require municipal drinking water system components to comply with the requirements of the NSF/ANSI 61 standard.

NSF/ANSI 61 is a performance-based standard that evaluates the amount of contaminants that leach from the products into drinking water, rather than setting prescriptive limits on content. NSF/ANSI 61 requires analysis for any chemicals that leach from a material into drinking water and a toxicological evaluation of concentrations leached to ensure that they are below levels that may cause potential adverse human health effects.