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Hercules 35230 Tankless Descaling Solution

Descaling solution

Descaling solution

Updated October 2026

The short answer

A well-specified descaling solution for flushing a scaled heat exchanger.

Delivers
Descaling solution.
Watch for
Match it to your heater's fittings.
Suits
Flushing a scaled heat exchanger.
Solution
Citric acid
Material
Liquid
Dimensions (seller)
2.3"W x 7.45"H
Product weight
2.7 lb
Prices change often; the button shows today's price.

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What it delivers

The Hercules 35230 Tankless Descaling Solution is a descaling solution for tankless water heaters.

It's the liquid side of a flush: mix it as the label says and circulate it through the heater with 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.

Listed details: features: Concentrated; material: Liquid; model: 35230; solution: Citric acid.

The listing gives dimensions of 2.3 in (W) x 7.45 in (H), a weight of 2.7 lb and haymaker descaler product in the box.

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

  • Match it to your heater's fittings

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 number35230Retailer
Dimensions (seller)2.3"W x 7.45"HRetailer
Features (seller)ConcentratedRetailer
Product weight2.7 lbRetailer
MaterialLiquidRetailer
SolutionCitric acidRetailer

Rival units at this flow

More descaling and maintenance kits rated for similar demand

Full descaling and maintenance kits spec grid

Final verdict

A well-specified 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 Hercules 35230 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.