Discover the ideal solution for your needs with our Domestic Wastewater Treatment Plants. For larger, commercial-scale systems, please see below.
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Maintenance Plans
At The Rainwater Guy, we specialize in maintaining Graf wastewater treatment plants, as well as other leading brands, for both domestic and commercial systems. Regular servicing is essential to ensure your system operates efficiently and remains compliant with regulations, which require at least one annual service or as advised by the manufacturer and/or environmental agencies. Neglecting maintenance can lead to health hazards and environmental risks.
Our maintenance plans include:
• Comprehensive inspection and servicing of all system components
• Diagnosis and resolution of system errors
• Monitoring of waste levels with emptying recommendations
• Verifying that all control systems and alarms are functioning properly
• Testing key effluent parameters to ensure optimal system performance.
• Internal visual inspections for signs of wear or damage.
• Expert advice and basic user training
• Detailed service reports with photos after each visit
• Prompt quotes for any necessary repairs
• Free phone support from our engineers
• Exclusive out-of-hours WhatsApp access for urgent assistance
Service frequency is tailored to your system’s size and whether you require chemical dosing, ranging from annual to quarterly visits. Contact us to discuss your needs and receive a bespoke quote.


Commercial Systems
Wastewater treatment systems serving large commercial sites or housing developments often involve greater complexity due to higher usage. These setups may include multiple or oversized compressors, additional tanks, chemical dosing systems, or even separate pumping stations. As a result, they require more frequent and specialised servicing to ensure all components—particularly compressors and dosing units—are operating efficiently, free from excessive wear, and compliant with regulatory standards. We can also coordinate with water quality laboratories if more stringent effluent testing is required for your system.
We provide tailored maintenance packages specifically for commercial systems, with flexible service schedules—typically 2 to 4 visits per year—aligned to your system’s operational demands. Our bespoke solutions are cost-effective and built to reduce interruptions in service, ensuring your treatment plant performs reliably all year round.



