Water treatment in closed water systems

Closed water systems are subject to corrosion, scaling, suspended solids and bacterial infection. Any of these may lead to blockages, system failure, operational inefficiency and higher maintenance costs.

Seasonal conditions cause stagnation which can encourage bacterial growth and localised deposition and corrosion under ‘no flow’ conditions. The presence of air in radiators and black sludge in the base of radiators is indicative of inadequate water treatment and should be dealt with immediately if identified.

Guardian Closed Water System services:

The starting point of any water treatment programme is to ensure that the system is as clean as practically possible. Guardian delivers a number of services to create a hygienic environment, at the construction stage and through on-going maintenance:

  • Pre-commissioning cleaning
  • Remediation cleaning
  • Installation of filtration equipment or balanced flushing
  • Water treatment maintenance programme
  • Regular water condition monitoring

By employing Guardian to deliver a total Closed Water System solution, the overall performance of the system will be maintained constantly, ensuring the optimum use of energy and maximising the plant life. Scale build-up and corrosion will be minimised and maintenance costs and downtime to repair the system due to unplanned engineering, reduced.


Innovative solutions

Guardian’s closed water system solutions utilise the best methods and technology available, such as side stream filtration, chemical and non-chemical treatments, and continuous corrosion monitoring using Hevasure.

Hevasure protects expensive HVAC assets and reduces risk by continuously monitoring the parameters that cause corrosion and system failure.

By flagging up any issues before corrosion occurs; such as fluctuations in oxygen levels and the presence of bio-film; water hygiene is improved and potentially damaging conditions can be identified early-on.


All of our clients have access to GuardianCare, an online reporting system that enables works relating to a specific site to be viewed in real-time. No more waiting weeks for paperwork to arrive – all relevant documents, certificates, engineers’ work sheets or any other information can be viewed on-screen and printed instantly.