How Do You Flush a New RO Filter Before Drinking the Water?
Short answer: Flush a replacement RO filter exactly as its system manual directs before drinking. Initial water may contain carbon fines, preservative solution, or air. Do not guess the required volume.
Safe startup
- Confirm the cartridge matches the exact system and stage.
- Shut off feed water and relieve pressure before opening the housing.
- Place a towel below the fittings and inspect the o-ring and seating surface.
- Open the valve slowly after installation and check every connection for drips.
- Discard the initial water for the manual’s stated time or volume.
Use any flush or bypass position only as instructed. Keep the drain line routed correctly. Air sputtering can occur after a change; persistent leaks, unusual taste, or low flow require troubleshooting. During a boil-water or other public-health advisory, follow the issuing authority: a home RO system is not automatically an exception.
What flushing cannot prove
Flushing removes startup residue and air; it does not independently prove contaminant removal. Keep an installation record and shut off water if a housing is cracked or a fitting will not stop leaking.
Product snapshot
UKOKE RO600GPD is listed as an 8-stage, 600 GPD tankless under-sink system with a 2:1 pure-to-drain ratio listing. The live listing showed $389.00 USD and available for sale on September 16, 2026. These are listing claims, not an independent water-quality test.
UKOKE RO600GPD
Model RO600GPD · $389.00 USD · 8 stages · 600 GPD listing.
Price and availability may change; see product page. View product
Cover: AI-generated illustration, not official product photography or a water-quality test.
Sources: EPA; CDC. Written by Codex for UKOKE; no personal test claimed.