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Peakflowc 2021 4c


  • Scale inhibitor
  • Chemical-free and environment-friendly
  • Increases flow rates
  • For up to 20 gpm
  • Commercial
Navien PeakFlow® C scale prevention system
PeakFlow® C certifications
  • Scale inhibitor
  • Chemical-free and environment-friendly
  • Increases flow rates
  • For up to 20 gpm
  • Commercial
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Navien PeakFlow®C... the complete package

Floor-standing design with  protective poly outer jacket

Easy inlet/outlet connection for fast installation and maintenance.

Valve can be simply disassembled for cleaning.

PeakFlow C media with gravel to improve water flow and even water distribution through the media - last up to 3 years

Built-in bypass valve

Bypass position

In-Service position

High-performance distributor tube with upper and lower baskets

PeakFlow® series video

This highly recommended environmentally friendly system treats hard water issues to address the water quality going into your Navien units, other water-related products and your water supply lines. A “must buy” in areas of hard water. Scale build-up from hard water is the biggest single reason for reduced performance.

PeakFlow C prevents scale by converting dissolved hardness minerals into powerless particles that will not attach themselves onto any of the components in the system. PeakFlow C, when sized correctly for the installation, will help to ensure the longevity of your system, and help eliminate hard water quality problems

Maximum pressure
90 psi/6.2 bar
Maximum temperature
Minimum temperature
Inlet/outlet connections
1" MPT
Service flow rate
Up to 20 gpm (76 L/m)
Continuous flow rate
Up to 16 gpm (60 L/m)
Media does not have a grain removal capacity. However, other contaminants present in the water will gradually degrade the effectiveness of this media (see Operation and Maintenance).
Unit size (W x H)
10" x 54"
Media replacement period
3 years
6.5 to 8.5
Hardness (maximum)
75 grains (1282 ppm CaCO3)
Water Pressure
15 psi to 90 psi (1.03 bar to 6.2 bar)​
40°F to 100°F (5°C to 38°C)
<2 ppm
Iron (maximum)
0.3 mg/l
Manganese (maximum)
0.05 mg/l
Oil & H2S
Must be removed before PeakFlow™C
Must be removed before PeakFlow™C
Silica (maximum)
20 ppm* - PeakFlow media does not reduce silica scaling. While silica tends to have a less significant effect on scale formation than other minerals, it can act as a binder that makes
  A B C D
  in. mm in. mm in. mm in. mm
PeakFlow C 54 1372 10 254 12 305 2 51
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