Puretec RO270 JR Service Kit (CB951, MC051 & RET1812 - 75) - Installed Today
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Puretec RO270 JR Service Kit (CB951, MC051 & RET1812-75)
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PURETEC RO270 REPLACEMENT CARTRIDGES

Puretec RO270 JR Service Kit – MC051 & CB951 Replacement Cartridges

The Puretec RO270 JR Service Kit combines the two genuine replacement pre-filter cartridges specified for the current Puretec RO270 reverse osmosis system: the MC051 moulded carbon cartridge and CB951 carbon block cartridge.

These two cartridges make up the RO270's first and second filtration stages before water reaches the RET1812-75 reverse osmosis membrane.

This service kit is designed for the regular cartridge-maintenance cycle. The RET1812-75 membrane is a separate replacement component and is not included in this two-cartridge JR service kit.

Quick answer: this RO270 service kit includes 1 × MC051 and 1 × CB951. Puretec specifies both cartridges for replacement approximately every 6 months, depending on water quality and usage. The RET1812-75 RO membrane is the system's third filtration stage but is ordered separately when membrane replacement is required.
PRODUCT AT A GLANCE

RO270 JR Service Kit Key Details

2 Cartridges MC051 + CB951
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2.5" × 10" Both Cartridges
6 Months RO270 Cartridge Guide
RO270 Compatible System
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WHAT'S INCLUDED

What's Included in This RO270 Service Kit?

1 × Puretec MC051

5 micron moulded-carbon cartridge combining sediment reduction with chlorine, unwanted taste and odour treatment.

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1 × Puretec CB951

0.5 micron bonded activated-carbon cartridge designed to reduce chlorine, unwanted taste, odour, sediment and specified cysts.

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RET1812-75 membrane not included. Puretec lists the RET1812-75 as the replacement RO membrane for the RO270, but it is a separate service component from the MC051 and CB951 cartridge pair supplied in this kit.
RO270 FILTRATION SEQUENCE

How the Three RO270 Stages Work Together

The Puretec RO270 uses three filtration stages, with the two cartridges in this service kit protecting and preparing the water before it reaches the reverse osmosis membrane.

Stage 1 – MC051

5 micron moulded carbon provides sediment and chlorine treatment before the finer second stage.

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Stage 2 – CB951

0.5 micron bonded activated carbon provides finer filtration together with chlorine, taste, odour and cyst reduction.

Stage 3 – RET1812-75

The reverse osmosis membrane provides the ultra-fine membrane filtration stage. This component is purchased separately when replacement is due.

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REGULAR RO270 MAINTENANCE

Replace the Two Pre-Filter Cartridges Every 6 Months

Puretec's current RO270 user guide specifies replacing the cartridges approximately every 6 months, depending on incoming water quality and usage.

Changing the MC051 and CB951 as scheduled helps maintain the pretreatment stages positioned ahead of the reverse osmosis membrane.

The RO membrane follows a different maintenance cycle and should not automatically be replaced every time the MC051 and CB951 are changed.

STAGE 1

Puretec MC051 Moulded Carbon Cartridge

The MC051 is not a sediment-only polypropylene cartridge. It uses powdered activated carbon attached to a cellulose-free synthetic fibre matrix.

This construction combines 5 micron sediment filtration with chlorine, unwanted taste and odour reduction in one cartridge.

5 Micron

Nominal filtration rating of 5 micron.

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2.5" × 10"

Standard-size cartridge used as stage one in the current RO270.

16 L/min

Puretec's listed individual flow rating for the MC051 cartridge.

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STAGE 2

Puretec CB951 0.5 Micron Carbon Block Cartridge

The CB951 is a bonded activated-carbon cartridge with a nominal 0.5 micron rating.

Puretec specifies the cartridge for reduction of chlorine, unwanted taste, odour, sediment and specified cysts.

0.5 Micron

Provides substantially finer nominal filtration than the first-stage MC051.

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2.5" × 10"

Uses the same standard physical cartridge format as the MC051.

15 L/min

Puretec's listed individual flow rating for the CB951 cartridge.

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CYST REDUCTION

CB951 & Cryptosporidium Reduction

Puretec specifies the CB951 for 99.9% Cryptosporidium cyst reduction under the applicable cartridge performance conditions.

This treatment claim applies specifically to the CB951 cartridge and should not be generalised to every carbon filter or to the MC051.

The complete RO270 also relies on its reverse osmosis membrane for the ultra-fine filtration stage that follows these two cartridges.

REVERSE OSMOSIS MEMBRANE

What About the RET1812-75 Membrane?

The RET1812-75 is the replacement reverse osmosis membrane specified by Puretec for the current RO270.

It is a separate service component from the MC051 and CB951 pre-filter cartridges and therefore is not included in this JR cartridge kit.

Puretec's general maintenance guidance notes that reverse osmosis membranes commonly require replacement approximately every 1–3 years, depending on the system, source water and operating conditions.

Do not replace the membrane solely because the six-month cartridge service is due. Follow the RO270 maintenance requirements and replace the RET1812-75 when its applicable service interval or operating condition indicates that membrane replacement is required.
SPECIFICATIONS

RO270 Service Cartridge Specifications

Specification MC051 CB951
RO270 Stage Stage 1 Stage 2
Cartridge Type Moulded activated carbon Bonded carbon block
Nominal Micron Rating 5 micron 0.5 micron
Size 2.5" × 10" 2.5" × 10"
Listed Cartridge Flow 16 L/min 15 L/min
Primary Treatment Sediment, chlorine, unwanted taste and odour Chlorine, taste, odour, sediment and specified cysts

Individual cartridge flow ratings are not the drinking-water production rate of the RO270. Reverse osmosis production is governed by the complete RO system and membrane.

RO270 SYSTEM

Puretec RO270 System Overview

The current Puretec RO270 is a three-stage under-sink reverse osmosis system designed around the MC051, CB951 and RET1812-75 replacement components.

270 L/day Listed Capacity
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3 Stages Cartridge + RO
0.0005 Micron Nominal RO Rating
RO270-LF Current Model
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RO TREATMENT

Why the Pre-Filters Matter

The reverse osmosis membrane performs the system's ultra-fine separation stage, but the MC051 and CB951 perform important treatment before water reaches the membrane.

The first two stages reduce sediment and chlorine loading while also providing carbon treatment. Maintaining these cartridges on schedule helps keep the pretreatment arrangement operating as Puretec designed it.

WHEN TO REPLACE

When Is the RO270 JR Service Kit Due?

Puretec's RO270 user guide specifies cartridge replacement approximately every 6 months, dependent on water quality and usage.

  • Six-month cartridge service is due
  • Water usage has been higher than normal
  • Incoming water quality has changed
  • Water flow or production appears reduced
  • Taste or odour has noticeably changed
  • Previous cartridge service date is unknown

Changes in RO performance can have causes other than cartridge condition. Membrane condition, incoming pressure, tank operation and other system components can also affect performance.

NON-USE

What If the RO270 Has Not Been Used?

Puretec instructs RO systems to be flushed for approximately 10 minutes after periods of non-use longer than 2 days.

For non-use periods of approximately 2 weeks or more, Puretec notes that cartridge replacement may be necessary.

CARTRIDGE REPLACEMENT

What Is Involved in an RO270 Cartridge Service?

The MC051 and CB951 are conventional cartridges installed inside reusable RO270 filter housings.

  • Confirm the system is a Puretec RO270
  • Isolate the incoming water supply
  • Relieve system pressure as required
  • Open the applicable filter housings
  • Remove the existing MC051 and CB951
  • Clean accessible housing components as required
  • Inspect accessible O-rings and sealing surfaces
  • Install MC051 in stage one
  • Install CB951 in stage two
  • Reassemble the filter housings correctly
  • Restore the water supply
  • Check housings and fittings for leaks
  • Flush and recommission the RO270 according to Puretec instructions
BEFORE ORDERING

Check These Details First

  • Your system is a Puretec RO270
  • Stage one replacement is MC051
  • Stage two replacement is CB951
  • You require the regular two-cartridge service set
  • RET1812-75 membrane replacement is not required in this kit
  • Existing housings and fittings are serviceable
  • Water can be safely isolated for servicing
  • System is accessible beneath the sink
DIY OR PROFESSIONAL SERVICE

Can the RO270 Cartridges Be Replaced Yourself?

Puretec describes cartridge replacement as a routine maintenance procedure when completed according to the system instructions.

Owner replacement may therefore be practical where you can safely isolate the system, open and reseal the filter housings and recommission the RO270 correctly.

Use professional servicing if the system condition is uncertain. Leaking housings, deteriorated seals, damaged tubing, valves, storage-tank problems or other RO faults may require additional parts or diagnosis beyond a standard cartridge change.
ORDERING OPTIONS

Choose How You Want to Order

Supply Only

Order the MC051 and CB951 replacement pair for delivery to supported Australian locations where you already have a Puretec RO270.

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Regular Cartridge Service

Replace the two manufacturer-specified pre-filter cartridges without automatically replacing the RO membrane.

Professional Service Option

Professional RO cartridge replacement may be available in selected Installed Today Brisbane and Gold Coast service areas.

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COMMON QUESTIONS

Questions About the Puretec RO270 JR Service Kit

What Is Included in This Service Kit?

The kit contains one Puretec MC051 and one Puretec CB951 replacement cartridge.

Does It Include the RET1812-75 RO Membrane?

No. The RET1812-75 membrane is a separate replacement component for the RO270 and is not included in this two-cartridge service kit.

Which Cartridge Goes in Stage One?

The MC051 5 micron moulded-carbon cartridge is the current stage-one replacement specified by Puretec.

Which Cartridge Goes in Stage Two?

The CB951 0.5 micron carbon block cartridge is the current stage-two replacement.

What Is Stage Three?

Stage three is the RET1812-75 reverse osmosis membrane, which is purchased separately when membrane replacement is required.

How Often Should MC051 & CB951 Be Replaced?

Puretec's current RO270 guide specifies approximately every 6 months, depending on water quality and usage.

How Often Is the RO Membrane Replaced?

Puretec's general maintenance guidance states that RO membranes typically require replacement approximately every 1–3 years, depending on the system and operating conditions.

Is MC051 a Sediment-Only Cartridge?

No. It is a moulded-carbon cartridge combining sediment filtration with chlorine, taste and odour reduction.

What Is the CB951 Micron Rating?

The CB951 has a nominal filtration rating of 0.5 micron.

Does the CB951 Reduce Cryptosporidium Cysts?

Yes. Puretec specifies the CB951 for 99.9% Cryptosporidium cyst reduction under the applicable cartridge performance conditions.

Are Both Cartridges the Same Size?

Yes. Both the MC051 and CB951 use the standard 2.5" × 10" cartridge format.

Is the RO270 Rated at 15 or 16 L/min?

No. Those figures are individual cartridge flow ratings. The RO270's drinking-water production is governed by the complete reverse osmosis system and its membrane.

Should I Replace the Membrane Every Six Months?

No. The six-month guidance applies to the regular MC051 and CB951 cartridge service. The RO membrane follows a different replacement cycle.

What Should I Do After the System Has Been Unused?

Puretec instructs the RO system to be flushed for approximately 10 minutes after more than 2 days of non-use. Longer periods may require cartridge replacement.

Can Installed Today Replace the RO270 Cartridges?

Professional replacement may be available in eligible Brisbane and Gold Coast service areas where the system is accessible and in serviceable condition.

WHY INSTALLED TODAY

Order the Correct RO270 Service Components

Correct Cartridge Pair

Receive the MC051 and CB951 combination Puretec currently specifies for regular RO270 cartridge replacement.

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Clear Membrane Separation

The RET1812-75 membrane is treated as a separate service item rather than being incorrectly included in every six-month cartridge change.

Installation Capability

If you prefer professional servicing, Installed Today may also be able to replace the cartridges in selected local service areas.

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FINAL CHECK

Is This the Right Service Kit for Your Puretec RO270?

The Puretec RO270 JR Service Kit provides the two genuine cartridges required for the RO270's regular pre-filter service: MC051 5 micron moulded carbon and CB951 0.5 micron carbon block.

Puretec specifies replacement of these cartridges approximately every 6 months, depending on water quality and usage.

The RET1812-75 reverse osmosis membrane is not included in this cartridge pair and should be ordered separately when membrane replacement is due. Before ordering, confirm that your installed system is a current RO270 using MC051, CB951 and RET1812-75 replacement components.

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Important Note

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Fast & Reliable Delivery – What to Expect

Same Day Delivery: Available in Brisbane and Gold Coast on select units ordered before 8:00am
Express Delivery: 1–4 business days
Standard Delivery: 2–8 business days

Same Day Delivery

Same day delivery is available for selected hot water systems in Brisbane and Gold Coast metro areas when ordered before 8:00am, subject to stock availability, delivery capacity and suitable transport conditions.

Fast Metro Delivery

Most hot water orders in metro areas are delivered quickly, with around 90% arriving within 1 business day.

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If your express delivery order takes longer than 1–4 business days, we will adjust the delivery timeframe to our standard 2–8 business days and refund your express shipping charge automatically.

Order Tracking

We will send your delivery details as soon as your order has been dispatched.

Need help with your delivery? Contact our team and we’ll be happy to assist.

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