Water Treatment System, Hardness, Flush, Device, Soft

Water Treatment

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Residential Use Treatment Guidelines

	Hardness	Treatment	Flush
Type of Water	Level	Device	Frequency*

Soft	0-1 gpg	None	None
Soft	(0-17 mg/L)	None	None
	(0-17 mg/L)
Slightly Hard	1-3 gpg	None	None
Slightly Hard	(17-51 mg/L)	None	None
Moderately	3-7 gpg	Water Softener	Once a Year**
Hard	(51-120 mg/L)	Scale Inhibitor	Once a Year**
Hard	7-10 gpg	Water Softener	Once a Year**
Hard	(120-171 mg/L)	Water Softener	Once a Year**
	(120-171 mg/L)	Scale Inhibitor
Very Hard	10-14 gpg	Water Softener	Treatment
Very Hard	(171-239 mg/L)	Scale Inhibitor	Required
	(171-239 mg/L)	Scale Inhibitor	Required
Extremely	> 14 gpg	Water Softener	Treatment
Hard	(> 239 mg/L)	Scale Inhibitor	Required

Commercial Use Treatment Guidelines

	Hardness	Treatment	Flush
Type of Water	Level	Device	Frequency*

Soft	0-1 gpg	None	None
Soft	(0-17 mg/L)	None	None
	(0-17 mg/L)
Slightly Hard	1-3 gpg	None	None
Slightly Hard	(17-51 mg/L)


Moderately	3-7 gpg	Water Softener	Once a Year **
Moderately	(51-120 mg/L)	Water Softener	Once a Year **
Hard	(51-120 mg/L)	Scale Inhibitor

Hard	7-10 gpg	Water Softener	Twice a Year**
Hard	(120-171 mg/L)	Water Softener	Twice a Year**
	(120-171 mg/L)	Scale Inhibitor
Very Hard	10-14 gpg	Water Softener	Treatment
Very Hard	(171-239 mg/L)	Water Softener	Treatment
	(171-239 mg/L)	Scale Inhibitor	Required
Extremely	> 14 gpg	Water Softener	Treatment
Hard	(> 239 mg/L)	Scale Inhibitor	Required

* Install Isolation Valves to allow for flushing.

** Flushing is required if a water treatment device is not installed.

*Install Isolation Valves to allow for flushing.

**Flushing is required if a water treatment device is not installed.