Coolguard 401 Soft Water Inhibitor

£259.00 exc. VAT

Safety Data Sheet emailed upon order.

For business and contractors use only.
Product unsuitable for public & domestic usage.

Product description and usage details below.


Buy 5-10 drums, receive a 10% discount
Buy more than 11 drums, receive a 15% discount

Comes in 25KG drum (Liquid chemical)

COOLGUARD 401 is an alkaline blend of inorganic and organic scale and corrosion inhibitors. The product is stable over a wide range of temperature and pH variations and provides scale and corrosion control over a wide range of water qualities and operational conditions.

Suitable for
Open evaporative recirculating cooling water systems.

Dosage Calculation

The dosage rate required is given by the following:

Dosage (m/m3 of make-up) = Reserve required in recirculation 
                                                         Concentration factor


Reserve required in recirc conc factor  =  100ml/m3
Concentration factor                                =  5

Dosage required (ml/m3)                         =  100ml/m3 / 5 (cf)

Dosage required                                        =  20ml/m3 of make-up

It is recommended at start-up and after system upset the product be dosed at 3 times normal dosage for a period of a week to promote rapid passivation.

InhibitorpHCalcium HardnessTemporary Calcium HardnessInhibitor ConcentrationApplication Notes
Coolguard 185X7.5 - 9.5300 - 600200 - 600100ml/m3 minScale Inhibitor that requires a reasonable Temporary Calcium Hardness level to act as a corrosion inhibitor. Not suitable for use with continuous chlorination/bromination.
Coolguard 4016.5 - 9.5300 max300 max100 - 200ml/m3Whilst product can be used at up to 600 Calcium it is recommended it be limited to 300 and an out and out scale inhibitor be used for higher levels

Related Products

  • Biocide ITA – broad spectrum biocide suitable for the disinfection of closed, chilled and cooling systems.
  • Biocide BQ – suitable for use in cooling systems and swimming pools.
  • Coolguard 185X – corrosion & scale inhibitor suitable for a wider range of pH and temperatures

Servicing options and contracts available

Take advantage of Feedwater’ servicing options and contracts when you buy our chemical products.

Help & Advice on choosing the right inhibitor

Additional information

Weight 25 kg

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