Quick verdict
A stronger feature match for hot drinks, provided you will actually use hot water and accept the appliance footprint.
At a glance
| Format | Countertop reverse osmosis with heated dispensing |
|---|---|
| Rated output | 75 GPD (manufacturer rating) |
| Drain efficiency | 3:1 pure-to-drain claimed by manufacturer |
| Hot dispensing | Yes, room temperature to 95 °C settings |
| Filters | M6RFG cartridge; manufacturer indicates about 12 months |
What everyday use looks like
The M6HG combines countertop RO and adjustable hot-water dispensing. The manufacturer lists selectable temperatures up to 95 °C, a glass pitcher and the same manual-tank approach as the M6SL.
It requires electricity and worktop clearance. If a kettle already meets your needs, the extra feature might not justify its purchase premium.
Ongoing maintenance
Waterdrop states a roughly £69.99 annual filter allowance for the M6HG and lists the M6RFG replacement filter at about £70. Hot-water electricity use depends on how frequently and how much water you heat; our calculator intentionally does not claim a measured electricity rate.
Use the running-cost calculator for a transparent estimate with editable assumptions.
Reasons to skip it
A hot-water RO unit may be overkill if you only pour a glass of cool tap water, have limited counter space or want a low-maintenance appliance.
Our decision checklist
- Measure your available space, including access for filter changes.
- Check the official installation and filter manual.
- Verify prices, included filters, warranty and delivery at checkout.
- Look up your water provider's quality report before assuming RO is necessary.
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Sources & verification
Facts below are taken from the linked sources; product information may change. Last editorial check: 13 November 2026. No hands-on product testing was performed.