Plumbing — FAQ
What's the difference between carbon and reverse osmosis filtration?
Carbon filters use activated charcoal to adsorb chlorine, taste, and odor molecules plus some heavy metals. Reverse osmosis forces water through a 0.0001-micron membrane, removing dissolved solids, fluoride, nitrates, and virtually all contaminants carbon cannot touch.
Do under-sink filters work with well water?
Standard carbon filters improve taste but won't remove dissolved minerals, nitrates, or arsenic common in well water. Reverse osmosis systems like the iSpring RCC7AK are essential for well water treatment, stripping contaminants while remineralizing for safe consumption.
How difficult is installation?
Direct-connect filters install in 15 minutes with basic wrench skills. RO systems requiring dedicated faucets need 1-2 hours and possible countertop drilling. Renters should choose drill-free options; homeowners benefit from permanent RO installations.
What maintenance is required?
Replace carbon filters every 6-12 months depending on water quality. RO membranes last 2-3 years. Sanitize the system annually. The CuZn's 5-year filter eliminates most maintenance, while RO systems need more frequent attention for optimal performance.
Will these filters reduce water pressure?
Carbon filters cause minimal pressure drop (2-5 PSI). RO systems reduce pressure to the dedicated faucet only, leaving main faucet pressure unaffected. Whole-house filters impact appliances; under-sink systems are isolated to the drinking water line.
Are replacement filters interchangeable between brands?
Generally no. AO Smith, Aquasana, and Waterdrop use proprietary connections. However, third-party filters like Aquacrest WF52-R are engineered for cross-brand compatibility. Always verify model numbers before purchasing replacements to ensure proper fit and seal.
