System maintenance
Five Matching Filtration Stages
Includes sediment, T28 carbon, the selected RO membrane, mixed-bed DI, and T33 post-carbon cartridges.
5-Stage Countertop RO/DI Replacement Filter Kit — Sediment, T28, 75/150 GPD Membrane, DI, T33, Wrench & 8 Fittings — SKU 4FILTERDIK
Price range: $69.00 through $139.00
5 Filter Set for 5-stage Universal Countertop RO Systems, including Sediment, T28, 75 or 150 GPD membrane, DI close to 0ppm and T33 inline filter cartridges, SKU# 4FILTERDIK
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Description
Complete 5-stage countertop RO service kit
Five replacement filters with RO membrane, DI polishing, wrench, and eight replacement fittings
This complete maintenance set is designed for compatible 5-stage portable and countertop reverse-osmosis systems using inline quick-connect filters. It replaces the sediment, T28 carbon, RO membrane, mixed-bed DI, and T33 post-carbon stages and includes the service accessories needed for a more complete filter change.
5 filtersComplete five-stage replacement set
75 or 150 GPDSelect the matching RO membrane
8 fittingsReplacement connection fittings included
1 wrenchService tool included
Complete replacement package
Refresh all five filtration stages at the same time
The set replaces every water-treatment cartridge in a compatible 5-stage UltraPure countertop RO system. Changing the complete set helps restore flow, membrane protection, ionic polishing, and final taste performance when the existing filters have reached the end of their service life.
Service accessories
Wrench + Eight Replacement Fittings
Includes one compatible service wrench and eight replacement fittings for renewing selected cartridge and membrane-housing connections.
Five replacement stages
Protection, membrane separation, DI polishing, and final carbon treatment
1
5-Micron Sediment Filter
Helps capture rust, sand, dirt, and suspended particles before they reach the carbon filter and RO membrane.
2
T28 Coconut Carbon Filter
Helps reduce chlorine, taste, odor, and selected organic compounds while helping protect the RO membrane.
3
RO Membrane
Choose the membrane output that matches the system configuration: 75 GPD or 150 GPD.
4
Omnipure K2555-BB DI Filter
Mixed-bed ion-exchange media further polishes residual dissolved ions after reverse osmosis.
5
T33 Coconut Carbon Filter
Provides final taste and odor polishing before the water is collected for use.
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 × Omnipure K2555-BB mixed-bed DI filter
- ✓1 × T33 coconut-shell activated carbon post-filter
- ✓1 × service wrench
- ✓8 × replacement fittings
Key benefits
A more complete service kit than filters alone
Complete Five-Stage Set
Replaces every filtration cartridge in a compatible 5-stage UltraPure countertop RO system.
New RO Membrane Included
Choose the output rating that matches the existing system configuration.
Mixed-Bed DI Polishing
Provides additional ionic reduction after reverse osmosis.
Eight Replacement Fittings
Refreshes selected cartridge 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 countertop RO replacement-filter and service kit |
|---|---|
| Compatible system type | Selected 5-stage 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 |
| DI filter | Omnipure K2555-BB mixed-bed ion-exchange filter, approximately 10″ × 2″, 1/4″ female ports |
| Post-carbon filter | T33 acid-washed coconut-shell carbon, approximately 10″ × 2″, 1/4″ female ports |
| Replacement fittings | 8 pieces included |
| Service wrench | 1 included |
| Filter quantity | 5 cartridges total |
| Package dimensions | 12 × 10 × 6 in |
| Package weight | 80 oz / 5 lb |
| SKU | 4FILTERDIK |
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
- ✓DI cartridge: approximately 8–12 months or when post-DI TDS rises beyond the required target
- ✓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 UltraPure configuration
The system should use sediment, T28 carbon, RO membrane, DI, and T33 filters in this sequence.
The system should use sediment, T28 carbon, RO membrane, DI, and T33 filters in this sequence.
!
Inline 1/4″ tubing connections
Confirm that the existing filters use compatible 1/4″ tubing and removable fittings.
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.
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.
The included wrench and membrane must match the existing classic countertop membrane housing.
Replacement guidance
Plan approximately 30–40 minutes for a complete cartridge change
1
Shut Off and Depressurize
Disconnect the system from the faucet and allow pressure to dissipate before removing tubing or fittings.
2
Record the Tube Routing
Photograph and label each tube before disconnecting the old filters.
3
Replace One Stage at a Time
Match the flow arrow and stage position, then install the supplied fittings where required.
4
Flush and Check for Leaks
Pressurize slowly, inspect every fitting, and flush the 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 and expected production rate.
A membrane with the wrong GPD rating may not match the installed flow restrictor and expected production rate.
!
Universal does not mean every system
Filter size, port type, tubing size, stage order, and membrane housing must all be compatible.
Filter size, port type, tubing size, stage order, and membrane housing must all be compatible.
!
Near-zero TDS is not guaranteed
Final TDS depends on source water, membrane rejection, DI capacity, flow, and cartridge condition.
Final TDS depends on source water, membrane rejection, DI capacity, flow, and cartridge condition.
!
Flush before use
New carbon filters and the RO membrane require thorough flushing before taste and TDS readings stabilize.
New carbon filters and the RO membrane require thorough flushing before taste and TDS readings stabilize.
!
Inspect tubing ends
Cut damaged or deeply scored tubing ends square before inserting them into the new fittings.
Cut damaged or deeply scored tubing ends square before inserting them into the new fittings.
!
Membrane housing not included
This is a cartridge and service kit. The existing membrane housing is reused.
This is a cartridge and service kit. The existing membrane housing is reused.
This product includes five replacement filters, one service 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 countertop RO system?
Send the system model, membrane GPD rating, filter labels, tubing size, and clear photos of the current assembly before ordering.
Send the system model, membrane GPD rating, filter labels, tubing size, and clear photos of the current assembly before ordering.
Additional information
| Weight | 80 oz |
|---|---|
| Dimensions | 12 × 10 × 6 in |
| Membrane | 150 Gallons per day, 75 Gallons per day |
| Choose | Assembly, Filter Set |
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