About Phase Technology

The Water and Air Specialists

Phase Technology was established in 1993 to provide water treatment and air quality services to the building services, facilities management and healthcare sectors.

Client Focus

The success of the business has been a results of its service provider and compliance focused philosophy that we tailor for every site and client. We go the extra mile for our clients – developing long standing relationships, growing our business through service delivery excellence.

Our service delivery is designed so that all our clients even those with multiple sites in different areas will be looked after by one of our Technical Consultants. The Consultant heads a team providing all the necessary customer support services. We aim to give clients confidence that services are delivered to ensure compliance competently, safely and on time.

To learn more about our water quality services click here, or for more information on air quality services, click here.


Phase Technology Ltd was acquired by Marlowe Plc in August 2022.  Marlowe PLC is the UK leader in specialist services which assure safety and regulatory compliance for its clients.

Its extensive portfolio of group companies manages risks for businesses across individual divisions that focus on health & safety, HR and employment law compliance, fire safety, security, water safety, water treatment, air quality and occupational health services.

As part of the acquisition Phase Technology Ltd will become part of Hydro-X Water Treatment Ltd and join the Marlowe PLC portfolio of Water, Air and Asbestos companies. With collective annual sales in excess of £150m and over 1,500 employees, Marlowe PLC brings together well-established and respected companies: including WCS Group, WCS Services, Guardian Water, B&V Chemicals, WPL, Tersus, Sterling Hydrotech, Santia Asbestos Management, Clearwater and Atana.

Accreditations and affiliations

Legionella Control Association

Phase is a member of the LCA. The LCA was established to ensure users receive a high level of audiatable services that are in full compliance with the guidance set out in L8

Safe Contractor

Phase Technology is accredited by SafeContractor providing our clients peace of mind that the work is undertaken competently and safely

ISO 9001:14001

ISO Environmental & Quality

Phase Technology holds ISO 14001:2015, and has been ISO accredited since 1996 also holding ISO 9001:20015.


Phase Technology is a member of Achilles and achieved the BuildingConfidence Accreditation, demonstrating compliance with the Common Assessment Standard (Desktop), UK Health & Safety Legislation and CDM Regulations 2015.

Human Focus

Phase Technology is accredited at Organisation Level by Human Focus for General Health & Safety Arrangements. This certification scheme has been independently accredited by RoSPA

Cyber Essentials

Phase Technology is Cyber Essentials certified.