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Cardboard box with Nu-Calgon scale remover kit label

Nu-Calgon

Nu-Calgon Tankless Water Heater Scale Remover Kit 4387-01

SKU CH-RCKB-B1HK0

A complete kit with pump and solution for descaling tankless water heaters and restoring efficiency

  • Descale tankless heaters efficiently
  • Vital-Flo pump circulates solution
  • Removes lime scale from minerals
  • Restores heater performance and efficiency
  • Complete kit with pump and solution

Tankless Water Heater Descaling Kit

This Nu-Calgon kit is built for homeowners and service technicians who need to descale a tankless water heater. It contains every component required to circulate cleaning solution through the unit and restore heat-transfer efficiency. The package is ready to use on residential or light-commercial systems. It addresses the mineral build-up that naturally occurs in heated water.

Includes Submersible Circulation Pump

The single specification that determines fit is the included Vital-Flo submersible pump, model 4387, which moves the descaling fluid through the heat exchanger. No separate pump purchase or rental is necessary. The pump is sized for the flow path of typical tankless heaters. Buyers who need a chemical-only refill without a pump should choose a different product.

Restores Efficiency Through Full Circulation

Under sustained descaling the pump maintains continuous flow so the solution contacts all internal surfaces for the entire cycle. This steady circulation dissolves lime scale more evenly than a brief flush or static soak. The heater returns to its rated output once the deposit layer is removed. The kit is designed for periodic maintenance rather than emergency repair.

Highlights

  • Descale tankless heaters efficiently
  • Vital-Flo pump circulates solution
  • Removes lime scale from minerals
  • Restores heater performance and efficiency
  • Complete kit with pump and solution

Specifications

BrandNu-calgon

Questions about this item

How does the Vital-Flo pump circulate the solution through my tankless water heater?

The submersible pump moves the Vital-Flo descaling fluid through the heater's internal passages to dissolve lime scale from minerals in the water supply.

What connections does the kit use to attach to the heater's service valves?

The kit includes hoses that connect to the standard isolation or service valves found on most tankless units for a closed-loop flush.

What size bucket or container do I need to hold the pump and fluid during the flush?

A typical 5-gallon bucket provides enough volume to submerge the pump and hold the circulating solution for the descaling cycle.

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