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American Valve ScaleRX34 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.
Material
Copper, Stainless Steel, Titanium, Zinc
Dimensions (seller)
9.62"W x 2"H
Product weight
1.9 lb
Warranty
12-Year Limited Warranty
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What it delivers

The American Valve ScaleRX34 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: Lime scale reduction without electricity; material: Copper, Stainless Steel, Titanium, Zinc; model: ScaleRX34; warranty: 12-Year Limited Warranty.

The listing gives dimensions of 9.62 in (W) x 2 in (H), a weight of 1.9 lb and scalerx in the box.

Warranty, per the listing: 12-Year Limited Warranty.

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 numberScaleRX34Retailer
Dimensions (seller)9.62"W x 2"HRetailer
Features (seller)Lime scale reduction without electricityRetailer
Product weight1.9 lbRetailer
MaterialCopper, Stainless Steel, Titanium, ZincRetailer
Warranty12-Year Limited WarrantyRetailer

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 American Valve ScaleRX34 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.