Reverse osmosis (RO) is the most effective residential water purification technology available. An RO system forces water through a semi-permeable membrane with pores so small that virtually all dissolved contaminants — including lead, fluoride, arsenic, nitrates, pharmaceuticals, and hundreds of other substances — are removed. The result is water purity rivaling bottled water, delivered directly to your kitchen faucet.
Got Plumbing USA connects you with licensed plumbers who install under-sink and whole-home reverse osmosis systems.
What Reverse Osmosis Removes
RO systems remove 95–99% of total dissolved solids (TDS), including lead, fluoride, arsenic, chlorine, chloramines, nitrates, sulfates, pharmaceutical residues, PFAS/PFOA, heavy metals, and microplastics. This makes RO the most comprehensive filtration technology available for residential use.
Installation
Most residential RO systems are under-sink units that connect to your cold water line and include a storage tank and dedicated faucet. Installation involves connecting the system to the supply line, mounting the storage tank, drilling for the dedicated faucet, and connecting the drain line for waste water. Professional installation ensures proper connections and optimal water pressure for the membrane.
Cost
Under-sink RO system installation costs $300–$800 (system + labor). Premium systems with remineralization and UV sterilization run $600–$1,500. Whole-home RO (less common, for specific water quality issues) costs $3,000–$8,000. Annual membrane and filter replacements cost $50–$150.