An unvented hot water commissioning certificate records that an unvented hot water storage system has been installed and commissioned correctly in line with Building Regulations Part G3. It confirms the safety devices, pressures and temperatures were checked before the system was handed over.
Because unvented systems store hot water under mains pressure, the work is notifiable and must be carried out by an operative holding a recognised unvented hot water storage systems qualification. A commissioning record provides the evidence that the installation is safe and compliant.
TradePlanr lets you fill in the full commissioning record on your phone or tablet at the point of handover, capture the customer signature and produce a professional PDF certificate without paperwork back at the office.
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A G3 commissioning certificate is required whenever an unvented hot water storage system with a capacity over 15 litres is installed, replaced or significantly altered. The work is notifiable, so building control must be informed or the work self-certified under a competent person scheme.
The operative carrying out and commissioning the system must hold a current unvented hot water storage systems qualification. Without it, the installation cannot be lawfully self-certified.
The certificate should be issued to the customer on completion and kept alongside the manufacturer's documentation, as it may be requested during a property sale, insurance claim or warranty enquiry.
Record the property address, cylinder make, model and capacity, and the type of unvented system installed so the certificate identifies the exact appliance.
Log the expansion vessel charge pressure, expansion and temperature or pressure relief valve settings, thermostat and high-limit cut-out values, and confirm the discharge arrangements.
Tick the checks that confirm the work is notifiable under Part G3 and enter your unvented hot water qualification details for the compliance record.
Capture the customer signature on screen, generate the PDF certificate and store it against the job, ready to email or hand over on the spot.
Installing an unvented hot water storage system over 15 litres is notifiable under Building Regulations Part G3. The commissioning certificate is the record that the notifiable work has been done and self-certified correctly, so it is effectively required for compliant installations.
Only an operative holding a recognised unvented hot water storage systems qualification can lawfully install, commission and self-certify the work. TradePlanr records your qualification details on the certificate.
It covers the safety devices that protect against overheating and overpressure, including the expansion vessel, expansion and relief valves, thermostat, high-limit cut-out, tundish and discharge pipework.
Yes. TradePlanr is built for on-site completion, so you can fill in every field, capture the signature and produce the PDF at the property before you leave.
The HHIC Benchmark commissioning checklist for hot water storage cylinders.
The pressure/soundness test record for new or altered water and heating pipework.
The compliance record for plumbing work under the Water Supply (Water Fittings) Regulations 1999.
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