Hello, everything is NSF 42 except stage 2, stage 2 is NSF 42 and NSF 61. NSF 53 is usually for systems, rather than individual components, rarely you can see 53 applied to components. NSF 61 is highest for filter material though, Disruptor material.

As for Fresca, it is our in house brand. System is designed by pretty much... me, from absolutely best components available.

If you have any specific questions, please don't hesitate, I will gladly answer to any kind of questions. Thanks!

Were you looking for Fresca? Fresca is not there. As I mentioned, components of the system are all NSF certified. The system itself does not have a certificate with it's name on it. For example, the faucet is by QMP and it is listed under QMP,  fittings are by John Guest and therefore listed under John Guest.

Note also, that it is not always right to check NSF certification only from the website you mentioned. NSF standard can be certified by IAPMO for example, (it is accredited by ANSI/NSF) and this would be the case for Disruptor filter. All certificates for individual parts are available upon request.

Please provide me your email and I will gladly send the certification for all 3 stages. I prefer not to display it in public, since this way I may reveal suppliers/OEMs information to potential competitors and in fact some OEMs do not even allow that.

And I stand corrected, stage 1 is NSF61 and not 42. Mechanical (sediment) cartridge cannot be 42, 61 is the highest for the sediment cartridge media. I want to be transparent about it and and not just edit my posts, but rather mention the correct information.