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The system corrosion inhibitor concentration must be checked during annual servicing (instant
on-site test kits are available from inhibitor manufacturers) and additional inhibitor MUST be
added if the system is found to be under-dosed. Refer to the inhibitor manufacturer for further
guidance.
Note: All product warranties will be invalidated if the appliance is not serviced annually
by a Warmflow or OFTEC trained and registered technician. Details of the servicing
conducted must be recorded in the OFTEC Boiler Passport.