When the service engineer has completed a successful service and safety check, you will be provided with a copy of the Landlord Gas Safety Certificate (CP12) for your own records.
Pan fydd y peiriannydd wedi cwblhau prawf gwasanaethu a diogelwch llwyddiannus, cewch gopi o Dystysgrif Landlord Diogelwch Nwy (CP12) i’w chadw.