My water tastes flat - is this the filter to change?

Usually yes. Flat or stale taste at the faucet is most often the polish stage reaching the end of its life.

Authorized Puronics Dealer

(855) 684-7663

PURONICS Carbon Block Replacement Filter

PURONICS Premium Alkaline Replacement Filter

Replacement Filters

PURONICS Carbon Block Replacement Filter

SKU ICW-CB-01 Backordered(26)

A dense, extruded carbon block gives water more contact time than loose media, which is why this stage is where taste and odor really change. Positioned after the membrane, it polishes the finished water on its way to the faucet.

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Replace

Every 12 months

Prefer a technician?

Book a filter replacement visit

Fits your system

This pack is a direct-fit replacement for:

iContracting Water RO drinking water systems
Stage 5 polish position on qualifying under-sink systems

Not sure which system you have? Call (855) 684-7663 and we'll confirm the right parts for you.

Reorder & maintenance reminder

Filters & cartridges: every 6–12 months. Sediment, carbon and alkaline stages lose capacity within a year on Central Florida water.
Membranes & media: every 2–3 years. RO membranes and tank media last longer, but should be checked at the 2-year mark.
This item's schedule: Every 12 months

Installed on

Next replacement

September 14, 2027

Features

Extruded carbon block for extended contact time
Reduces chlorine taste and odor
Targets common taste-affecting contaminants
Low pressure drop across its service life
Food-grade materials throughout

Specifications

Stage: Post-membrane polish (Stage 5)
Media: Extruded carbon block
Nominal rating: 1 micron
Service life: Approximately 12 months

Compatible systems

iContracting Water RO drinking water systems
Stage 5 polish position on qualifying under-sink systems

Installation recommendations

1Relieve system pressure at the RO faucet.
2Disconnect the inline fittings and remove the old cartridge.
3Fit the replacement in the direction of the flow arrow.
4Restore pressure and flush before drinking.

Frequently asked questions

Customer reviews

"Noticeable difference in taste within a day of installing."

Priya S.

"The stale taste we had is completely gone."

Aaron L.

"Simple inline swap with the flow arrow clearly marked."

Michelle V.

"Water tastes clean without any plastic aftertaste."

Kenji M.

"Odor is gone and the water is much more pleasant."

Gloria B.

"Low pressure drop, exactly as described."

Tim R.

"Really easy for someone with zero plumbing experience."

Selena F.

"Good build quality on the fittings."

Bryce H.

"Our drinking water finally tastes bottled-quality."

Norma C.

"Flushed for a few minutes and it was perfect after that."

Justin P.

"Same great result as the last cartridge we bought."

Elena D.

"Fast shipping and a perfect fit on our system."

Kevin A.

"Big improvement in taste for very little money."

Rita N.

"Coffee and tea both improved after the change."

Simon G.

"Handled our chlorinated city water very well."

Talia W.

"Solid polish stage. Worth doing annually."

Miguel O.

"No leaks after reconnecting. Smooth process."

Erin K.

"Water is crisper and the ice tastes clean."

Vincent J.

"Straightforward maintenance every twelve months."

Aisha B.

"Exactly the cartridge our technician recommended."

Larry S.

"Great taste improvement immediately."

Nadia T.

"Packaging kept everything clean and sealed."

Colin M.

"Been buying this one for three years running."

Jasmine R.

"Good value and quick delivery."

Edgar Q.

"Very happy with the flow and the flavor."

Holly P.

"Does exactly what it promises."

Antonio F.