Plumbing my European Rocket Cinquantotto to a US 1/4" compression ice maker valve - Page 2

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pmansour112 (original poster)
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#11: Post by pmansour112 (original poster) »

Any simple NSF 42 'aesthetic' filter that removes chlorine, off tastes and odors, and particles will do the job here. Most of them last 6 months between cartridge replacements.
Thank you for the helpful responses! All these chemicals were a little overwhelming especially since they didn't show up on my water report, I'm grateful that you could take a look and help answer this.

re. NSF 42 filter -- is this something that would be necessary (e.g. for protecting the boiler) or can I get away without it (at the cost of taste)? If I don't need a filter, this could significantly simplify my hose issues and mean I don't need to go under the sink for storing the filter.

Anyway, a few quick searches for "NSF 42 filter for Rocket espresso" didn't show anything obvious. I'm seeing a lot of results for in-reservoir filters, as well as a "Rocket inline particle filter" ( ... cle-filter), though I feel like neither of these is relevant. Do you have any examples of what this could look like and where I could get it from?

-- UPDATE -- I found this 3M filtration system that seems to just go inline on the hoses / pipes, with 3/8" US inlets and outlets: ... 120MS.html

Would this be suitable?

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Team HB
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#12: Post by homeburrero »

NSF/ANSI 42 is just an American standard for water filters. It's used to certify that a filter meets certain structural standards and also may reduce substances that can affect the aesthetic quality of water (impurities such as chlorine and taste/odor). The next step up would be NSF 53 (which is intended for filters that improve health effects by reducing lead, copper, mercury, etc.). Filters that are certified per NSF 42 and make claims like "Effectively removes 97% of Chlorine, Class I Particulates, bad taste and odor" must be tested per NSF methods to meet those claims. Here's one example ... g5-10.html . (I believe that Everpure CG5-10 is also sold by Seattle Coffee Gear.)

Sometimes water people use the term 'NSF 42' to refer to any filter that is simple charcoal or carbon block designed to remove chlorine, off tastes and odors, and particulates, even if the filter has not been tested and certified per NSF standards.

If you use a generic 10" filter housing you won't be locked in to any brand of filter and can choose from a variety of generic filters, including ones that have special capabilities (like chloramine reduction). Some coffee equipment suppliers sell those generic housings, with heads that use different sizes and types of hose fitting connections (NPT, John Guest, etc). One example is here: ... 2865050660

That 3M 120MS that you linked would do a good job as well. It includes a scale inhibitor that I don't think you need but would do no harm. (Scale inhibitors are not softeners, they typically release a tiny amount of polyphosphate in the water that may reduce scale buildup on surfaces in the boiler.)
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