Cooling Tower Corrosion Inhibitor


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WTPH425 is a halogen resistant corrosion inhibitor designed for soft to low hardness waters which have corrosion potential.

WTPH425 contains background scale inhibitors to protect against hardness, slippage or over-concentration of system water. It contains a synergistic blend of hydroxyphosphonoacetic acid and sodium molybdate to provide excellent corrosion inhibition.

Dosing and Testing

WTPH425 is dosed to maintain a system reserve of 100ppm to 150 ppm.

A Molybdate test is available to determine reserves in the system (WTP TK105) or a phosphonate drop test kit (WTPTK107).

Molybdate as MoO4 X 20 = Reserve as product



Please refer to material safety data sheet for detailed handling/storage instructions. 
  • Avoid contact with eyes, skin and clothing.
  • In case of contact, immediately remove contaminated clothing and wash skin with soap and water.
  • For eyes, flush with plenty of water and seek medical attention.
  • Harmful if swallowed.


WTPH425 treatment can be shipped in 25 Litre and 205 Litre non-returnable containers.


Field Representatives can work closely with customer personnel to ensure the effective application of the water treatment programme. Regular service calls will be provided by qualified personnel.

More Information

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The above information is believed to be correct but does not purport to be all inclusive and shall be used only as a guide. The company shall not be held liable for any damage resulting from handling, contact, mis-use or mis-application of the above product. In all instances the user should satisfy themselves that this product is suitable for the anticipated application and should carry out suitable and sufficient risk/COSHH assessments and a method of use statement.

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