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Clearflow Solutions CFS-128 Tankless Descaling Solution

Descaling solution

Descaling solution

Updated October 2026

The short answer

A solid descaling solution for flushing a scaled heat exchanger.

Delivers
Descaling solution.
Watch for
Fit depends on your valves.
Suits
Flushing a scaled heat exchanger.
Solution
biodegradable
Dimensions (seller)
6 x 5 x 1.5 inches; 10.78 pounds
Product weight
4.89 kg
Prices change often; the button shows today's price.

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What it delivers

The Clearflow Solutions CFS-128 Tankless Descaling Solution is a descaling solution for tankless water heaters.

Descaler goes in the flush bucket in place of (or with) vinegar and is circulated through the heat exchanger by a flush pump.

Makers differ here. Rinnai's procedures use white vinegar and say never to use chemical solutions; follow your own heater's manual.

From the listing: model: CFS-128; solution: biodegradable.

The listing gives dimensions of 6 x 5 x 1.5 inches; 10.78 pounds and a weight of 4.89 kg.

Right unit for this house?

Install it when

  • Flushing a scaled heat exchanger
  • Owners who flush their own heater

Look at another unit when

  • Heaters whose manual calls for a different method

Strengths and trade-offs

Strengths

  • Descaling solution

Trade-offs

  • Fit depends on your valves

Install limits

  • Figures are the maker's or seller's own. Flow at a rise is our estimate from the input; gas, venting and electrical work needs a licensed professional.

Rated performance

Every figure below comes from the source shown in brackets. Where the maker doesn't state something, we say so instead of estimating.

Model numberCFS-128Retailer
Item formLiquidRetailer
ScentUnscentedRetailer
Product weight4.89 kgRetailer
Material featureBiodegradableRetailer
Dimensions (seller)6 x 5 x 1.5 inches; 10.78 poundsRetailer
SolutionbiodegradableRetailer

Rival units at this flow

More descaling and maintenance kits rated for similar demand

Full descaling and maintenance kits spec grid

Final verdict

A solid descaling solution for flushing a scaled heat exchanger.

Buy this unit

Our links open this exact model's product page. Prices and stock change; check what's included before you order.

Prices change often; the button shows today's price.

Each button opens this exact model. We may earn a commission on tracked links; it never changes what we publish. Disclosure

Questions buyers ask

Can I use the Clearflow Solutions CFS-128 Tankless Descaling Solution instead of vinegar?
Only if your heater's maker allows it. Rinnai's procedures call for undiluted white vinegar and warn against chemical solutions; other makers name specific descalers.