Test Setup
90cm single-sink cabinet, 52cm depth: 6.6L heater + 400G RO filter + tee. It fits, but pipe order matters.
Recommended Order: Filter First, Heater Second
Mains → tee → raw faucet / filter → heater inlet. The tank fills with filtered water, drastically reducing limescale; use a 400G+ filter.
Layout Tips
- Heater wall-mounted on the side panel, filter at the bottom.
- Route pipes behind the door side.
- Put a leak sensor at the lowest point.