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The Watts "Half-Turn" RO System is a 3 stage reverse osmosis system which contains two replacement water filter cartridges and one membrane. Below is a break down of each stage and the compatible replacement filter part numbers that can be found on our site.
STAGE 1 : WCBCS975 STAGE 2 : F110023 STAGE 3 : WCBCS975
STAGE 1 : WCBCS975
STAGE 2 : F110023
STAGE 3 : WCBCS975
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