GCC can provide full, end to end, legionella management and water hygiene services across the UK. This includes legionella risk assessments, legionella testing and disinfection, cold water tank cleaning and all remedials to achieve compliance and all certification required to meet your legal obligations.

GCC can also work with your in-house team or existing partners to provide specific elements of the service to suit your specific requirements.

Contact GCC to discuss your legionella management and water hygiene services requirements.

RPZ Valve Testing

An RPZ (Reduced Pressure Zone) Valve is a device which protects and backflow, providing protecting against the contamination of mains water supply, up to and including fluid category 4.

It is a legal requirement to have Reduced Pressure Zone (RPZ) valves checked on a regular basis, to ensure they provide the backflow protection required. This should be done at least yearly. All installations, commissioning and testing must be carried out in accordance with Water Suppliers’ Approved Installation Method AIM-08-01. Testing must be carried out by a approved and registered RPZ valve tester, qualified in accordance with the Water Supply (Water Fittings) Regulations 1999 (England and Wales).

GCC offers WRAS and WIAPS approved RPZ valve testing and installations by our experienced RPZ valve engineers and cover the whole of the UK. All GCC’s in-house Water Management Technicians are fully compliant and accredited to City and Guilds RPZ Valve Testing. GCC’s RPZ technicians are also registered on the Water Regs UK website .

We can usually arrange to carry out work at short notice and can provide you with certification, valve repair, valve replacement and servicing.

Contact GCC to discuss your exact requirements.

Remote Monitoring

Temperature checking as part of an integrated legionella prevention strategy can also be automated using permanent, on-site monitoring and data-acquisition sensors. Supported by offsite data analysis and alarm functionality, this 24/7 monitoring provides a far more thorough overview of a hot and cold water system. Trend analysis that can identify potential failures before they occur.

Contact GCC to request further details and a demonstration of the system.


Quality is at the heart of everything we do. This is supported by our dedicated back-office team and using ISO accredited processes and procedures.

Did you know that in 2018 GCC was the first company in the UK to successfully achieve simultaneous accreditation for ISO 9001 (Quality Management), ISO 14001 (Environmental Management) and ISO 45001 (Occupational Health & Safety). We’ve successfully retained all our accreditations in a simultaneous audit every year since.


You will be provided with a health and safety pack prior to GCC starting work. This including RAMS, COSHH data sheets and training certification.

Every member of the GCC team is trained to the highest industry standards through GCC’s in-house, British Institute Of Cleaning Science (BICSc) aligned training course. This includes modules covering Health & SafetyCOSHH, correct use of RAMS, NHS colour coded cleaning techniques and environmental training.