Atlantic water heater does not fill with water or fills very slowly.

Safety: Turn off power. Open a hot water tap to relieve pressure before disconnecting any pipes.

• Verify that the main cold water shutoff valve and the valve on the Atlantic safety group are fully open.
• Check the flexible hose to the heater for kinks or collapse; straighten or replace if necessary.
• Close the inlet valve, remove the safety group or inlet filter (if fitted), and inspect for debris or scale; clean or replace as needed.
• Reassemble, open the inlet valve, and confirm that water flows freely from an open hot tap until all air is purged.