Including filter system and high-performance Potassium filter.
Potassium is a common mineral that can appear in groundwater and, less often, in municipal supplies. It’s naturally present in soils and rock, and water moving through those materials can pick up dissolved potassium. For Arran homeowners who must watch potassium for health reasons, even modest concentrations matter — and because potassium generally has no taste or smell at normal levels, testing is the only reliable way to know if it’s in your water.
Many people in Arran first learn about potassium when their water lab report lists it among mineral readings like sodium, chloride, or total dissolved solids. In water, potassium exists as dissolved ions rather than particles, so it won’t settle out and won’t be captured by basic sediment filters. That also means some standard carbon filters won’t remove it. If you want to control potassium at the tap, start with a proper water test to see how much is present and in what form.
For whole-home reduction of potassium, a whole-house reverse osmosis system is the most effective single-filter choice. RO systems use a semipermeable membrane to reject dissolved ions like potassium instead of only filtering particles. Because potassium stays dissolved in water, this membrane separation is required to lower levels significantly. Installed ahead of your plumbing, a whole-house RO gives consistent potassium reduction to every faucet in an Arran home.
A whole-house RO is normally paired with prefiltration to remove sediment and to protect the membrane from chlorine or chloramine that can shorten its life. The membrane handles potassium removal while the other stages keep the system running well and reduce maintenance. RO systems also produce a concentrated reject stream, so they need a drain connection and space for equipment. Mr. Pure Water can review your Arran water test and household water use to size and configure a whole-house RO that reliably lowers potassium for your family.