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Home>Water Filter Brands>Culligan Water Filters>Culligan Reverse Osmosis Systems > AC-15


Culligan AC-15 and Culligan AC15 Aqua Cleer Reverse Osmosis System Compatible Filters

4-Stage RO System - Replacement Filters Available HERE

Culligan AC-15 Reverse Osmosis System AquaCleer and Culligan AC15 Aqua Clear Good Water Machine RO System Filters Compatible
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Product Code: AC-15
  • Culligan AC-15 Aqua Cleer Reverse Osmosis System Compatible Filters:
  • The Culligan AC-15 RO System contains three replacement filters and one membrane. Click on the filter name below to learn more about each filter.
  • The Culligan AC-15 Aqua Clear reverse osmosis system first stage starts on the left in the picture on the left.
  • The Culligan Good Water Machine AC-15 has a sediment stage, pre-carbon stage, membrane stage, and post filter carbon stage.
  • Reverse Osmosis water is ideal for coffee, tea, soup, juice, recipes, baby formula, houseplants, pets, pasta, ice cubes, steam irons, drink mixes, and everything you make with water.
  • Culligan AC-15 Aqua Cleer Compatible Part Numbers:
  • Stage 1 RS-23-SED5: Culligan Compatible 01-4015-38, 00-0001-20, 4412-75, 4496-27, S7011C, 4485-44, 4496-27
  • Stage 2 PRE-RO: Culligan Compatible 01-0125-80, 00-0011-38, 01-0042-91, 01-0000-78, 4027-96, 4487-63, 4496-28, 4487-62
  • Stage 3 TFM-18-A: Culligan Compatible 01-0001-45, 00-4493-72, 00449372 4493-72
  • Stage 4: K2333-KK 3/8" Quick Connect Fittings Culligan Compatible 01-0042-91 - OR - K2333-JJ 1/4" Quick Connect Fittings Culligan Compatible 01-0000-79
    Note: Most AC-15 models use the 3/8" Inlet/Outlet post filter. A few AC-15 models use the 1/4" Inlet/Outlet post filter.
  • Manufacturer: Culligan AC-15
  • Culligan AC15 AquaClear Reverse Osmosis System Stages:
  • Stage 1: The Culligan Compatible RS-23-SED5 Sediment Pre-Filter is a 5 micron sediment filter used in the first stage. It screens out dirt, sediment, sand, rust and other physical particles. The Stage 1 filter should be changed every 3 - 6 months depending on the level of sediment in your water. Culligan Compatible 01-4015-38, 00-0001-20, 4412-75, 4496-27, S7011C, 4485-44, 4496-27.

  • Stage 2: The PRE-RO Carbon Block Water Filter is used in the second stage. It reduces chlorine taste and odor that may be in your water supply. The Stage 2 filter should be changed every 6-12 months. Culligan Compatible 01-0125-80, 00-0011-38, 01-0042-91, 01-0000-78, 4027-96, 4487-63, 4496-28, 4487-62.

  • Stage 3: The TFM-18-A RO Membrane goes in the third stage. It is an 18 GPD membrane. The Stage 3 RO membrane should be changed every 2 years. Culligan Compatible 01-0001-45, 00-4493-72, 00449372 4493-72.

  • Stage 4: The K2333-KK 3/8" Inlet/Outlet post filter is the 4th stage. The polishing filter reduces chlorine taste and odor that may be in your water supply. The Stage 4 filter should be changed every 6-12 months. Culligan Compatible 01-0042-91.
    Note: A few AC-15 models have a 1/4" Inlet/Outlet for the post filter. For 1/4" Inlet/Outlets, order the K2333-JJ Post-Carbon Filter (Culligan Compatible 01-0000-79).
  • Culligan AC-15 Aqua Cleer Reverse Osmosis System Water Filter Change Intervals:
  • The filter change interval will vary due to your water quality and the amount of water used.
  • Culligan AC-15 Aqua Cleer RO System Parts & Accessories:
  • Culligan AC-15 O-Ring: OR-ACH. The o-rings should be replaced every filter change.
  • Culligan Aqua Cleer O-Ring Lubricant: OR-LUBRICANT-LG. O-Rings should be greased on every filter change with food-grade o-ring lubricant.
  • Culligan AC-15 RO Tank: RO-T25-P. Replace tank when needed.
  • Culligan AC-15 Aqua Cleer RO Tank Pressure Gauge: TPG-100. Monitor tank pressure to keep reverse osmosis system running optimally.


Disclaimer: Culligan International Company is the registered owner of the trademark Culligan. This replacement product is not manufactured, endorsed, or approved by the Culligan International Company. Part numbers and photographs of products and systems are used for identification purposes only and do not demonstrate an association with the Culligan International Company. This site makes no representation as to the effect the use of this replacement product may have on any warranty that you received with the purchase of a Culligan system.
  • Culligan AC-15 Aqua Cleer Reverse Osmosis Replacement Filter Instructions:
  • It is recommended that you sanitize your RO System every time you replace your membranes and filters with a product like Pro Chemicals Sani System.
  • Pro Chemicals Sani-System Liquid Sanitizer Video (See below for Instructions):


  • Pro Chemicals Sani-System Liquid Sanitizer Instructions:
  • Shut off water supply to RO unit and remove membrane and all filters. Use rubber gloves and store filters and membranes in water to prevent damage.
  • Turn on water faucet and depressurize system.
  • Turn off the water faucet, and pour entire packet directly into first main housing unit. Turn on water supply to RO system.
  • Allow system to fill with water. Time will vary depending on water pressure. However, system should be full within 5 10 minutes without filters or membrane. Flush system two times.
  • Replace or re-install membranes and all filters.
  • Store sanitizer in a cool, dry location. Rubber gloves are suggested when handling this product. Read relevant MSDS before handling product.
  • Do not mix with other chemicals.
  • Pro Products Sani-System Brochure.
    (Download Adobe Reader)
  • Sani-System Material Safety Data Sheet.

This product is no longer available
We distribute compatible filters for the Culligan AC-15 Aqua Cleer Reverse Osmosis System.

Stage 1: RS-23-SED5
Stage 2: PRE-RO
Stage 3: TFM-18-A
Stage 4: K2333-KK 3/8" Quick Connect Fittings - OR - K2333-JJ 1/4" Quick Connect Fittings
Note: Most AC-15 models use the 3/8" Inlet/Outlet post filter. A few AC-15 models use the 1/4" Inlet/Outlet post filter.

See the Replacements tab above for more information on each stage and the compatible filters for each stage.

These compatible replacement filters can be purchased below.
Replacement Filters and Parts or Alternative System for the Above Unavailable Product
Omnipure K2333-JJ Inline Carbon Water Filter (1/4 Omnipure K2333-JJ Inline Carbon Water Filter (1/4" FQC)
Omnipure K2333-KK Inline Carbon Water Filter (3/8 Omnipure K2333-KK Inline Carbon Water Filter (3/8" FQC) Culligan Compatible RS-23-SED5 Reverse Osmosis Pre-Filter Culligan Compatible RS-23-SED5 Reverse Osmosis Pre-Filter Culligan Compatible PRE-RO Carbon Block Reverse Osmosis Filter Culligan Compatible PRE-RO Carbon Block Reverse Osmosis Filter Culligan Compatible TFM-18-A Reverse Osmosis Membrane Culligan Compatible TFM-18-A Reverse Osmosis Membrane   Add to Cart