Technology
Treatment technology explained: membranes, softening, adsorption, and the engineering tradeoffs behind equipment choices.
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Softening or conditioning: matching salt-based and salt-free approaches to the job
Ion exchange softeners and scale-control conditioners solve different problems. A clear-eyed look at what each technology does, and what it does not.
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Reverse osmosis under the sink: what the membrane actually does
Point-of-use RO remains the workhorse for broad-spectrum reduction at the tap. How the systems work, where they fit, and what installations get wrong.
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From microfiltration to reverse osmosis: reading the membrane spectrum
Four membrane classes sit on one continuum of tightness, pressure, and cost. What separates MF, UF, NF, and RO, and how to choose along the axis.