Postal Water Test Comparison

The table below presents a comprehensive overview of the various chemical testing parameters analyzed in the Fernox postal water testing products. These parameters are carefully selected to assess the overall quality and condition of water within heating and cooling systems.

Each test provides valuable insight into specific aspects of water chemistry—such as pH balance, corrosion potential, scale formation, and inhibitor levels—helping to diagnose potential system issues and ensure optimal performance. By reviewing these results, users can identify imbalances, contamination, or treatment deficiencies, allowing for accurate corrective action and long-term system protection.

	View Product	View Product	View Product	View Product	View Product
	Water Quality Test	Diagnostic Water Test	System Health Check	Commercial Water Quality Test	Commercial Fill Water Test
System Water Test Fields
Appearance	✓	✓	✓	✓	-
pH	✓	✓	✓	✓	-
Conductivity uS/cm	✓	✓	✓	✓	-
M-Alkalinity As CaCo3 mg/L	✓	✓	✓	✓	-
P-Alkalinity as CaC03 mg/L	-	-	-	✓	-
Total Hardness As CaCo3 mg/L	✓	✓	✓	✓	-
Odour	-	-	-	✓	-
Suspended Solids mg/L	-	-	-	✓	-
Hardness Deposition %	✓	✓	✓	-	-
Calcium mg/L	-	✓	-	-	-
Magnesium mg/L	-	✓	-	-	-
Chloride mg/L	-	✓	✓	✓	-
Excess Chloride mg/L	-	✓	✓	-	-
Lithium mg/L	-	✓	✓	-	-
Sodium mg/L	-	✓	✓	-	-
Potassium mg/L	-	✓	✓	-	-
Molybdate mg/L	-	-	-	✓	-
Silicates mg/L	-	-	-	✓	-
Aluminium mg/L	✓	✓	✓	✓	-
Dissolved Iron mg/L	-	-	-	✓	-
Iron mg/L	✓	✓	✓	✓	-
Dissolved Copper mg/L	-	-	-	✓	-
Copper mg/L	✓	✓	✓	✓	-
Total Zinc mg/L	-	-	-	✓	-
Phosphorus mg/L	✓	✓	✓	✓	-
Boron mg/L	-	✓	✓	✓	-
Molybdenum mg/L	✓	✓	✓	-	-
Sebacate mg/L	-	✓	✓	✓	-
Nitrate mg/L	-	✓	✓	✓	-
Nitrite mg/L	-	✓	-	✓	-
Sulphates mg/L	-	✓	-	✓	-
Refractive Index	-	✓	✓	✓	-
Monoethylene Glycol %	-	✓	-	✓	-
Monopropylene Glycol %	-	✓	-	✓	-
Amonia mg/L	-	-	-	✓	-
Main Water Test Fields
Appearance	✓ (1)	✓	✓ (1)	-	-
pH	✓ (1)	✓	✓ (1)	-	✓
Conductivity uS/cm	✓ (1)	✓	✓ (1)	-	-
M-Alkalinity As CaCo3 mg/L	✓ (1)	✓	✓ (1)	-	-
Total Hardness As CaCo3 mg/L	✓ (1)	✓	✓ (1)	-	✓
Calcium mg/L	-	✓	-	-	-
Magnesium mg/L	-	✓	-	-	-
Chloride mg/L	-	✓	✓ (1)	-	✓
Lithium mg/L	-	✓	-	-	-
Sodium mg/L	-	✓	-	-	-
Potassium mg/L	-	✓	-	-	-
Aluminium mg/L	-	✓	-	-	-
Iron mg/L	-	✓	-	-	-
Copper mg/L	-	✓	-	-	-
Phosphorus mg/L	-	✓	-	-	-
Boron mg/L	-	✓	-	-	-
Molybdenum mg/L	-	✓	-	-	-
Sulphates mg/L	-	-	-	-	✓

* Please note that not all postal water testing products are available for sale in all countries. For information, please contact your local Fernox Representative.

⁽¹⁾ For UK System Health Check and Water Quality Test samples, mains results are taken from the Fernox water testing mains database, based on samples for the same postcode.