5-Stage Mineral Countertop RO Replacement Filter Kit — Sediment, T28, 75/150 GPD Membrane, T33, 4-in-1 Mineral, Wrench & 8 Fittings — SKU 4FILTERM1

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Description

Complete 5-stage mineral countertop RO service kit

Five replacement filters with RO membrane, 4-in-1 mineral post-filter, wrench, and eight fittings

This complete maintenance set is designed for compatible 5-stage remineralization portable and countertop reverse-osmosis systems using inline quick-connect filters. It replaces the sediment, T28 carbon, RO membrane, T33 post-carbon, and 4-in-1 mineral stages and includes the service accessories needed for a complete filter change.

5 filtersComplete five-stage mineral set

75 or 150 GPDSelect the matching RO membrane

8 fittingsReplacement connections included

1 wrenchMembrane-housing service tool

Complete replacement package

Refresh all five filtration stages at the same time

The set replaces every water-treatment cartridge in a compatible 5-stage mineral countertop RO system. Replacing the complete set helps restore sediment protection, chlorine pretreatment, membrane performance, taste polishing, and final remineralization.

System maintenance

Five Matching Filtration Stages

Includes sediment, T28 coconut carbon, the selected RO membrane, T33 post-carbon, and 4-in-1 remineralization cartridges.

Service accessories

Wrench + Eight Replacement Fittings

Includes one compatible membrane-housing wrench and eight replacement fittings for renewing selected cartridge and membrane-housing connections.

Five replacement stages

Protection, membrane separation, carbon polishing, and mineral treatment

5-Micron Sediment Filter

Helps capture rust, sand, dirt, and suspended particles before they reach the carbon filter and RO membrane.

T28 Coconut Carbon Filter

Helps reduce chlorine, taste, odor, and selected organic compounds while helping protect the RO membrane.

RO Membrane

Choose the output that matches the current system configuration: 75 GPD or 150 GPD.

T33 Coconut Carbon Filter

Provides final taste and odor polishing after reverse osmosis and before remineralization.

4-in-1 Mineral Post-Filter

Contains tourmaline stone, bioceramic media, maifan stone, and alkaline mineral media. It may add selected soluble minerals and gently increase the pH of acidic RO water.

Package contents

Filters and service parts included

✓1 × 5-micron inline sediment filter
✓1 × T28 coconut-shell activated carbon prefilter
✓1 × selected 75 or 150 GPD RO membrane
✓1 × T33 coconut-shell activated carbon post-filter
✓1 × 4-in-1 remineralization post-filter
✓1 × membrane-housing service wrench
✓8 × replacement fittings

Key benefits

A complete mineral RO service kit with replacement hardware

Complete Five-Stage Set
Replaces every filtration stage in a compatible 5-stage remineralization countertop RO system.

New RO Membrane Included
Select the same membrane rating used with the current flow restrictor.

MIN

4-in-1 Mineral Post-Filter
May add selected minerals and gently increase the pH of acidic RO water.

8FT

Eight Replacement Fittings
Refreshes selected filter and membrane-housing connections during service.

Service Wrench Included
Helps open the compatible membrane housing during membrane replacement.

Inline Quick-Connect Format
Designed for compatible classic countertop systems using standard 1/4″ tubing connections.

Specifications

Verified filter details

Product type	Complete 5-stage mineral countertop RO replacement-filter and service kit
Compatible system type	Selected 5-stage remineralization portable and countertop RO systems using inline quick-connect cartridges
Sediment filter	5 micron, approximately 10″ × 2″, 1/4″ female ports
Carbon prefilter	T28 coconut-shell activated carbon, approximately 10″ × 2″, 1/4″ female ports
RO membrane options	75 GPD or 150 GPD on the MyAquaFilter listing
Post-carbon filter	T33 acid-washed coconut-shell carbon, approximately 10″ × 2″, 1/4″ female ports
Mineral post-filter	4-in-1 remineralization cartridge, approximately 10″ × 2″, 1/4″ female ports
Listed mineral media	Tourmaline stone, bioceramic media, maifan stone, and alkaline mineral media
Replacement fittings	8 pieces included
Service wrench	1 included
Filter quantity	5 cartridges total
Listed package dimensions	12 × 6 × 6 in
Listed package weight	5 oz on MyAquaFilter; 5 lb on MyWaterClub — requires correction
MyAquaFilter parent SKU	4FILTERM1
MyWaterClub SKU	4FILTERM1-MEM

Typical service life

✓Sediment filter: replace based on flow, discoloration, sediment load, or the system schedule
✓T28 and T33 carbon filters: approximately 8–12 months or up to the listed capacity, depending on water quality and usage
✓4-in-1 mineral filter: approximately 8–12 months or when taste, pH, or mineral performance changes
✓RO membrane: approximately 2 years, depending on source water, pressure, prefilter maintenance, and measured rejection

Compatibility checklist

Confirm the existing system before ordering

✓

Five-stage mineral configuration
The system should use sediment, T28 carbon, RO membrane, T33 carbon, and 4-in-1 mineral filters in this sequence.

✓

Inline 1/4″ tubing connections
Confirm that the existing filters use compatible 1/4″ tubing and removable fittings.

✓

Matching membrane output
Select the same 75 or 150 GPD membrane rating used with the current flow restrictor.

✓

Compatible membrane housing
The included wrench and membrane must match the existing classic countertop membrane housing.

Replacement guidance

Plan approximately 30–40 minutes for a complete filter change

Shut Off and Depressurize

Disconnect the system from the faucet and allow pressure to dissipate before removing tubing or fittings.

Record the Tube Routing

Photograph and label each tube before disconnecting the old filters.

Replace One Stage at a Time

Match each flow arrow and stage position, then install the supplied fittings where required.

Flush and Check for Leaks

Pressurize slowly, inspect every fitting, and flush all new filters before using the water.

Before purchase

Good to know

Confirm the membrane rating
A membrane with the wrong GPD rating may not match the installed flow restrictor or expected production rate.

Mineral and pH results vary
Final TDS, mineral release, and pH depend on source-water chemistry, flow, contact time, and cartridge condition.

TDS may increase after remineralization
A higher final TDS reading can be expected because the mineral stage adds dissolved material after reverse osmosis.

Flush before use
New carbon, membrane, and mineral media require thorough flushing before taste, TDS, and pH readings stabilize.

Inspect tubing ends
Cut damaged or deeply scored tubing ends square before inserting them into replacement fittings.

Photo must show all included parts
The updated product image should display five filters, one wrench, and all eight replacement fittings.

This product includes five replacement filters, one membrane-housing wrench, and eight replacement fittings. It does not include a complete preassembled frame, membrane housing, countertop stand, faucet adapter, tubing set, clips, or flow restrictor unless explicitly selected or stated elsewhere on the product page.

Not sure whether this set matches your mineral countertop RO system?
Send the system model, membrane GPD rating, filter labels, tubing size, and clear photos of the current assembly before ordering.

Ask a Water Filter Specialist