4rain FLAT S Notice D'installation Et D'entretien page 53

Inspect the entire system for tightness, cleanliness, and stability at least once every three months.
The entire system should be serviced approximately every 5 years. All parts should be cleaned and their
function checked. Maintenance should proceed as follows:
•
Empty tank completelyw
•
Check that all built-in parts are securely mounted
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7 Inspection and maintenance
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