Flow-rate, comparison, maintenance and treatment-order guides for whole-house UV water systems.
UV water-system sizing for two-bathroom homes by peak GPM, validated UV dose and prefiltration.
Read guide →UV sizingUV system sizing for three-bathroom homes using 9 vs 15 GPM classes, peak demand and validated dose.
Read guide →UV sizingUV treatment sizing for four-bathroom homes with 15 vs 22 GPM systems and peak-demand calculations.
Read guide →Commercial comparisonUV and chlorination compared for private wells by microbes, residual protection, maintenance, chemicals and treatment design.
Read guide →Worth-it guideWhen whole-house UV is worth buying for private wells and when testing or other treatment should come first.
Read guide →Pre-treatment guideWhat water should be removed before UV treatment and why sediment, turbidity and scale affect performance.
Read guide →Ownership costAnnual UV water-treatment cost including lamp unit, electricity, sleeve cleaning and prefilters.
Read guide →Maintenance guideHow to clean, inspect and replace a UV water-system quartz sleeve and why fouling matters.
Read guide →Treatment-order guideUV light before or after a water softener? See the typical well-water treatment order, why UV usually goes after softening, and the exceptions that change placement.
Read guide →Problem-to-product guideHow to choose a whole-house UV system for bacterial contamination using validated dose, flow rate and prefiltration.
Read guide →Exact model comparisonVIQUA Arros 9, 15 and 22 compared by validated flow, power consumption, chamber size and household fit.
Read guide →UV Water Treatment Buying & Sizing covers products and decisions that can look similar on a product page while solving different problems in practice. Start by defining the water source, the symptom or contaminant you want to address, and whether the goal applies to one drinking-water tap or the entire home. That prevents a common mistake: choosing a highly rated product that uses the wrong treatment method for the actual problem.
Once the treatment method is clear, compare the specifications that control real-world performance. For point-of-use filters, that can mean certified contaminant claims, production rate, faucet flow and replacement-filter cost. For whole-house or well-water equipment, service flow, pressure drop, backwash requirements and incoming water chemistry matter more. For powered equipment, electrical requirements, operating cost and maintenance access belong in the buying decision from the beginning.
Technology names are useful starting points, not proof of performance. Activated carbon, catalytic carbon, reverse osmosis, ion exchange, UV and mechanical filtration each have known strengths, but finished products differ in media quantity, contact time, flow, design and certification scope. When a health-related contaminant drives the purchase, verify the exact model's performance documentation or certification rather than assuming every product in the category shares the same claims.
Also compare the full ownership cycle. Add replacement cartridges, media, lamps, salt, electricity, shipping and likely service over several years. A higher purchase price can be justified when consumables last longer and parts remain easy to source; a cheaper system can become more expensive when proprietary replacements are frequent or difficult to find. The guides above are organized to help move from diagnosis to a realistic shortlist rather than from a generic “best” list to an impulse purchase.