Closed System Water Treatment

Feedwater is a manufacturer and supplier of a range of high-quality water treatment chemicals for all types of closed circuit heating, cooling and chilled water systems.

Closed circuit or closed loop water systems are a convenient way of heating or cooling building services applications and industrial and commercial processes. As the name closed loop suggests the intention is generally to retain the same water in the system for an indefinite period which means that without effective water treatment corrosion products and foulants can build up impairing flow and heat transfer and control valves can become blocked and inoperative. Heating systems can become scaled up; chilled water systems can become choked with pseudomonas slime-forming bacteria. A poorly treated closed circuit water system will be wasting your money long before it starts to leak.

To overcome these many potential problems we have developed a comprehensive range of cost effective inhibitors and biocides which are designed specifically for closed systems. If your system is already suffering because of inadequate water treatment don’t despair because we can provide products and services which will restore flow and heat transfer to even heavily fouled systems.

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Closed System Corrosion Inhibitors

Closed circuit inhibitors are matched to the system metallurgy and operating temperature. Most of the inhibitors are designed to protect a range of different metals but particular care needs to be taken if a system contains aluminium.

Corroban 22 is a DEHA based oxygen scavenger which is used in the treatment of HTHW systems. – POA

Corroban 40 is an industry standard nitrite based closed circuit corrosion inhibitor for LTHW and chilled water systems. Not suitable for systems containing aluminium. – Order Online

Corroban 41 is a new generation synergised nitrite closed system inhibitor which gives the same level of protection as traditional treatments but at a much lower dosage rate. It is ideal for MTHW, LTHW and chilled water systems. Not suitable for systems containing aluminium. – Order Online

Corroban 42 is a special synergised nitrite treatment developed specifically for heating and chilled water systems containing aluminium. – POA

Corroban 48P is a highly concentrated nitrite based chilled water corrosion inhibitor that can also be used for LTHW and other closed systems incorporating a pink pH indicator. Not suitable for systems containing aluminium. – POA

Corroban 50 is a synergised molybdate / organic corrosion inhibitor which is ideal for MTHW, LTHW and chilled water systems, including those containing aluminium. Because it is a synergised blend it is able to provide excellent protection at much lower molybdate reserves and much lower cost than conventional molybdate treatments. –Order Online

Corroban 55 is a synergised closed loop corrosion inhibitor which incorporates both nitrite and molybdate. It is ideal for MTHW, LTHW and chilled water systems. Not suitable for systems containing aluminium. – POA

Polytan 4F is a tannin based oxygen scavenger and heating system corrosion inhibitor which is used in the treatment of larger, predominantly steel, systems which can be used across the temperature range from chilled water to HTHW systems. – Order Online

Corroban 50 Molybdate Corrosion Inhibitor

£107.00£182.00 exc. VAT
  • Synergised Molybdate Corrosion Inhibitor
  • Cost effective
  • Non-toxic and easy to use
  • Excellent protection
  • Protects steel, cast iron, copper, brass, aluminium and galvanised steel
  • Can be used in systems with aluminium (see note*)
  • Suitable for chilled water, LTHW and MTHW systems

Safety Data Sheet emailed upon order.

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

Save money with our complete closed system protection bundle, Corroban 50, Biocide & Molybdate Test Kit Click Here

Description and usage instructions below.

Corroban 40 Nitrite Corrosion Inhibitor

£165.00 exc. VAT
  • Traditional nitrite based inhibitor
  • Cost effective
  • Excellent protection
  • Protects steel, cast iron, copper & brass
  • Not recommended for aluminium
  • Suitable for chilled water, LTHW systems

Safety Data Sheet emailed upon order.

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

Save money with our complete nitrite protection bundle, Corroban 40, Biocide & Nitrite Test Kit Click Here

Description and usage instructions below.

Corroban 41 Nitrite Corrosion Inhibitor

£305.00 exc. VAT
  • Synergised nitrite based inhibitor
  • Low dosage rate
  • Highly cost effective
  • Excellent protection
  • Protects steel, cast iron, copper & brass
  • Not recommended for aluminium
  • Suitable for chilled water, LTHW and MTHW systems

Safety Data Sheet emailed upon order.

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

Don’t forget your Biocide and Nitrite Test Kit!

Description and usage instructions below.

Polytan 4F 25KG – Tannin Polymer Alk Blend

£181.00 exc. VAT
  • Traditional Tannin based Corrosion Inhibitor
  • Very cost effective
  • For large, predominantly steel systems
  • Excellent protection
  • Protects steel, cast iron, copper, brass
  • Not suitable for aluminium
  • Suitable for chilled water, LTHW, MTHW and HTHW systems

Safety Data Sheet emailed upon order.

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

Description and usage instructions below.

Closed System Biocides & Antifreeze

If untreated closed heating/cooling systems can become a breeding ground for a range of troublesome microbes such as Pseudomonas, nitrifying and sulphate reducing bacteria. They can cause fouling, destroy closed loop inhibitors and cause MIC (microbially induced corrosion).

A chilled water biocide is essential to prevent slime growth and we would always recommend a closed circuit biocide is incorporated in any system operating below 80 °C.

Biocide ITA is a broad spectrum closed loop biocide which effectively controls all the commonly encountered bacteria in closed water systems. – Order Online

*Use biocides safely. Always read the label and product information before use.*

Glycol Antifreeze’s

Corrofreeze is an inhibited mono-ethylene glycol antifreeze designed specifically for use in chilled water systems in industrial and building services HVAC applications. – Order Online

Corrofreeze BPC is food-grade and pharmaceutical grade propylene glycol. – POA

Corroban 90 and 99 are food-grade inhibited propylene glycol antifreeze’s that can also be used as bacteriostats to safely control microbial growth in food production applications. – Order Online

Biocide ITA General Purpose Biocide

£161.00£299.00 exc. VAT

Open and Closed System Biocide

  • Controls microbial growth
  • Broad spectrum of activity
  • Effective against Pseudomonas
  • Cost effective
  • For chilled water, LTHW and open cooling systems

Description and dosage instructions below.

Safety Data Sheet emailed upon order.

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

Corrofreeze 25KG – Antifreeze

£91.00 exc. VAT

Safety Data Sheet emailed upon order.

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

Description and usage instructions below.

Closed Loop Cleaning Chemicals

We produce a range of heating system cleaning chemicals and closed system chemicals for pre-commission cleaning, descaling and renovation cleaning of all types of closed circuit water systems.

Follow the link to find out more.

Descalers and Chemical Cleaners

Descaler SF 25KG Acid cleaner

£80.00 exc. VAT
  • Based on Hydrochloric Acid
  • Incorporates film forming inhibitor
  • Protects carbon steel, copper & brass
  • Highly effective penetrant
  • Dissolves limescale & rust

Safety Data Sheet emailed upon order.

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

Product description and usage details below.

Neutralising Powder 25KG

£77.00 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.

Acid Descaling Powder 25KG

£206.00 exc. VAT
  • Incorporates protective film inhibitor
  • Protects mild & stainless steel, copper & brass
  • Effective penetrant & dispersant
  • Dissolves limescale

Safety Data Sheet emailed upon order.

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

Product description and usage details below.

Alkbuild 25KG Alkalinity Builder

£80.00 exc. VAT
  • Neutralises acidity
  • Raises pH
  • Increases alkalinity
  • Multiple uses
  • High strength
  • Cost effective

Safety Data Sheet emailed upon order.

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

Product description and usage details below.

Corrosperse 84 Cleaning Agent

£143.00£233.00 exc. VAT

Closed System Cleaning Agent

  • Non-acidic & non-aggressive
  • For pre-commission & older systems
  • Dissolves and disperses
  • Safely discharges to sewer*

Safety Data Sheet emailed upon order.

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

Description and usage instructions below.

Acid Cleaner & Descaling Bundle

£169.00£293.00 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.

own label chemicalsOwn Label Closed System Treatment Chemicals

We can supply you with our closed system water chemicals with your own label on the drum. So if you are a water treatment service company, a closed water system specialist supplier or an FM company looking to increase your added value, why not contact us because we can help you.

Export Distributors Wanted

We are always looking for professional overseas partners and distributors, so if you are a water treatment specialist looking for an alternative supplier for your water treatment products, or you believe you have the capability to establish a high-quality water treatment service operation in your own territory, then please contact us.

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