Welcome to The Rainwater Guy

With over 16 years of industry experience, we deliver trusted, cost-effective services in rainwater harvesting and sewage treatment systems for both residential and commercial customers.

Our expert team provides a complete range of services, including:

  • Routine maintenance and servicing
  • Installations, commissioning, and system upgrades
  • Professional remedial works and repairs
  • Underground rainwater tank cleaning
  • Tailored consultations for projects of all sizes

Whether you're a homeowner looking to optimise your system or a commercial client seeking dependable long-term support, we bring the same level of dedication, technical expertise, and customer care to every job.

Let our knowledge work for you – ensuring your systems are compliant, efficient, and built to last.

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Maintenance, Servicing  & Remedial Works

Much like any mechanical system, rainwater harvesting and sewage treatment units require regular maintenance to ensure optimal performance. Routine servicing not only minimises the risk of unexpected breakdowns and costly repairs but also ensures your systems remain compliant with environmental regulations and operate at maximum efficiency.

Installations, commissioning, and system upgrades

Our experienced team provides on-site support throughout the installation process, offering expert guidance from start to finish. This includes scheduled visits at key project stages—pre-commencement, mid-installation, and final commissioning—to ensure your system is installed correctly and fully compliant with current standards, including BS 8515 and relevant Water Regulations.

Underground rainwater tank cleaning

Maintaining a clean underground rainwater tank is essential for preserving water quality, reducing unpleasant odours and discolouration, and minimising sediment build-up that can lead to damage or premature wear of internal components. Regular cleaning helps ensure your system continues to operate efficiently and reliably.

Consultations

We provide specialist advice and technical support tailored to your site-specific requirements—whether you're planning a new system, upgrading an existing one, or need expert input to support other teams involved in your project. By working closely with homeowners, contractors, and industry professionals, we deliver effective solutions that align with sustainability targets, ensure regulatory compliance, and help reduce water consumption.

📞  Get in touch today to discuss your requirements or learn more about our full range of services below:

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Rainwater Harvesting Services

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Wastewater Treatment Services

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Commercial

Our portfolio includes a wide range of commercial clients across various sectors, whom we support with the ongoing maintenance and servicing of their rainwater harvesting and wastewater treatment systems.

We work directly with companies, local councils, and housing associations to service systems installed in residential developments, schools, office buildings, warehouses, and industrial facilities.

Additionally, we partner with facilities management companies, ensuring their clients receive the same high standard of service and technical expertise as our direct customers.

Contact us today to discuss how we can support your organisation with reliable, compliant, and cost-effective water system management.

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Housing Developments

We work closely with a number of housing development companies installing rainwater harvesting and sewage treatment systems across their properties.

Our support spans the full project lifecycle - from initial site visits and planning to on-site coordination during construction, through to installation, commissioning, and ensuring systems are fully compliant ahead of handover to new homeowners.

We also provide cost-effective maintenance packages tailored to development sites, giving homeowners confidence that their systems are being managed by a professional and dependable team.

Get in touch today to learn how we can support your development with expert guidance and end-to-end system management.

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  • Friendly, efficient service. They could not be more thorough and helpful. Will definitely be using them for yearly service of our rainwater harvesting system. They went over and above to make sure everything is as it should be and took time to explain everything to me too.
    Sarah Jarman
  • We have a rainwater harvesting system that went faulty. So pleased to have it up and running again thanks to the rainwater guy ltd. Great and prompt service.
    Will Hattersley
  • Great service, friendly and quick replies to our problem today. Thank you
    Doma Hipperson
  • A pleasure doing business with The Rainwater Guy. The level of service has been first class since I first made enquiries; Chloe and Laura in the office and Jamie out on site have all been brilliant. Everything installed and explained properly with some brilliant advice along the way. If you are looking to install a rainwater harvesting system I would thoroughly recommend this team!
    Steven Harding
  • I contacted The Rainwater Guy to get my rainwater harvesting system working. We had tried a few other options first with no luck, as it is a complex system. Within just a few days of contacting The Rainwater Guy we had an engineer on site, who did a comprehensive review of all the equipment and got every component working as it should. I am delighted that the problems are now all resolved, and would recommend The Rainwater Guy. I will certainly use them in future.
    Caroline Lavelle