Reverse Osmosis Drinking Water Systems.

Reverse osmosis is the only residential filtration method that removes dissolved solids — the molecular-scale contaminants that whole-home carbon filtration and softeners can't touch. A typical RO system is a four- or five-stage assembly installed under the kitchen sink: sediment pre-filter, carbon pre-filter (protects the membrane from chlorine), semi-permeable RO membrane (the actual TDS removal stage), post-carbon polish filter, and a pressurized storage tank that holds 3–4 gallons of treated water so you get full flow at the dedicated faucet. The system rejects 94–99% of total dissolved solids — fluoride, residual lead from pre-1986 plumbing, nitrates, pesticides, sodium added by ion-exchange softeners, and the trace contaminants that drive the taste and aftertaste in unfiltered municipal water.

Most South Bay households that install RO are replacing bottled water for drinking, cooking, ice, and coffee. The math is direct: a family of four typically goes through $40–$80 a month in bottled water, while RO membrane and pre-filter replacements over the same period average $8–$12 a month. The payback period is 12–18 months, after which you've eliminated the plastic, the storage clutter, and the trips to the store. The pre-pressurized storage tank means full flow at the dedicated faucet — no slow trickle while the membrane works in the background. We size production capacity (gallons per day) to household demand: a 50 GPD system covers most Torrance, Hawthorne, and Manhattan Beach kitchens; high-use households or homes that supply the refrigerator ice maker through the RO loop step up to 75 or 100 GPD.

Installation is permit-free, under-sink, and typically completed in 2–3 hours. We install the dedicated faucet (matched to your existing fixture finish), tap the cold supply with a self-piercing or compression saddle valve, route the drain saddle to the sink tailpiece, and mount the four-stage manifold to the cabinet wall. The storage tank sits on the cabinet floor with the system pre-pressurized so flow at the faucet is immediate after the initial flush cycle. Maintenance is simple: pre-filters every 6–12 months, RO membrane every 2–3 years, post-carbon every 12 months. We set up the schedule with every install and stock all replacement cartridges if you want us to handle service automatically. The optional ice-maker tap and refrigerator water-line connection adds about 30 minutes to the install and runs filtered water to the fridge for premium ice and chilled drinking water.