The HV3 is designed to be "fit and forget," but basic maintenance keeps it running for decades.

Inside the manual (page 22) is a warranty registration QR code. You must register within 30 days of installation. Without the manual, you might miss this deadline.

The official manual (typically 20–30 pages) covers:

: Connect the overflow pipe from the side of the cabinet. This must run through an outside wall and be visible at its exit. UK Water Softeners Commissioning & Setup

Manually add about 5 liters of water to the cabinet before loading your first salt blocks .