Do not decide from the presence of RO alone. Confirm the refrigerator's inlet requirements and its approved filter or bypass arrangement. Whirlpool's cited guidance recommends removing or bypassing its refrigerator filter on an RO feed, but the mechanism varies by model. Changing that filter stage also changes which documented treatment claims apply; better flow does not certify safe water.
Match the refrigerator, not just the filter brand
An RO line and a refrigerator cartridge are two treatment stages. Whether they should stay together is a question for the exact refrigerator's instructions, the RO system and the contaminants you intend to reduce. Record the appliance model, current cartridge or bypass part and where its supply actually comes from.
Whirlpool's pressure guidance recommends removing or bypassing the refrigerator filter when the covered appliance is supplied by reverse osmosis. That is an actual manufacturer instruction to check, not a rule to pull a cartridge from any refrigerator.
Use the approved bypass arrangement
Whirlpool's separate filter-check procedure describes covered refrigerators that continue operating in bypass mode when their filter is removed. It also explains that an increased dispenser flow can indicate a clogged or incorrectly installed cartridge.
Look up the installed model before attempting that procedure. Confirm whether removal alone is permitted or whether a specific bypass part is required. Do not force a filter housing, improvise a plug or assume a part that resembles the old cartridge is compatible. Follow its removal, installation and flushing directions, and stop if the housing leaks or will not release as described.
A faster pour after a documented check addresses restriction. It does not establish that all appliance components or the water supply are acceptable.
Check the RO feed as its own system
The pressure guidance also says to let an RO storage tank refill after heavy use and check its sediment filter. Give a qualified provider the actual refrigerator inlet specification rather than raising household pressure to compensate for one slow dispenser.
The refrigerator supply-line guide addresses the feed connection. RO installation planning addresses the upstream equipment. A full tank with weak flow at the dedicated drinking faucet needs its own delivery-path investigation, not an automatic refrigerator cartridge replacement.
Recheck what treats the drinking water
Removing the refrigerator cartridge removes that cartridge's treatment stage. Do not transfer its advertised reduction claims to the RO unit or assume that a second filter was redundant for every contaminant.
Whirlpool's everydrop guidance ties testing to substances listed on the filter's performance data sheet. Keep the exact sheets and maintenance instructions for the stages that remain installed. Match those claims to your water concern; taste, clear ice and normal flow cannot independently prove contaminant reduction.
Keep a record of the approved configuration and any unresolved dispensing or ice symptoms. If the model requirements are unclear, ask appliance support and the water-treatment provider to confirm them together before changing parts. That preserves both the intended supply arrangement and a clear record of the treatment actually in use.