WPM · ThermoblockKD-310
Hong Kong-made triple-thermoblock semi-automatic with a 58 mm group, dual independent pumps, and simultaneous brew-and-steam capability — a serious feature set in a compact stainless chassis.
The short version
The KD-310 delivers genuine thermoblock temperature stability and simultaneous brew-and-steam at a price point that undercuts most comparable Western semi-automatics.
The trade-off is a proprietary group head that limits portafilter options and a learning curve that rewards patience with dialling in.
Why people buy it
- Triple-thermoblock architecture with independent steam thermoblock allows pulling a shot and texturing milk at the same time without waiting for mode switches.
- Dual-pump system (15-bar coffee, 4-bar steam) maintains stable extraction pressure independent of steam activity.
Why they don’t
- Proprietary 58 mm stainless group head is not E61-compatible, limiting aftermarket portafilter and accessories options.
The full tally
- Triple-thermoblock architecture with independent steam thermoblock allows pulling a shot and texturing milk at the same time without waiting for mode switches.
- Dual-pump system (15-bar coffee, 4-bar steam) maintains stable extraction pressure independent of steam activity.
- Adjustable OPV and programmable pre-infusion (1-10 s) give genuine dialling-in range for a machine in this class.
- Compact 280 mm width punches well above its footprint for anyone wanting semi-professional output on a crowded counter.
- Proprietary 58 mm stainless group head is not E61-compatible, limiting aftermarket portafilter and accessories options.
- Single-walled baskets only in the box — demands a quality separate grinder; any grind inconsistency will show immediately.
- Thermoblock architecture, while fast and stable, does not offer the thermal mass of a brass boiler, which some experienced users notice on extended back-to-back sessions.
What the community knows
Years of owner threads, distilled.
Thermoblock machine with genuine temperature stability and mid-shot pressure control, but non-standard group locks accessories and parts availability depends on official WPM channels; sparse enthusiast documentation and zero r/espresso consensus leave it under-vetted in Western…
Reliability
shows up every morning, year after year
Beginner fit
kind to first-timers
Ceiling per dollar
how far the cup can go, per dollar
All 9 community measures
price-to-performance the community respects
shows up every morning, year after year
parts and repairs — you are never stranded
mods, guides, and community know-how around it
kind to first-timers
years before you outgrow or replace it
how far the cup can go, per dollar
speed and simplicity, day to day
Worth knowing before you buy — Thermoblock precision machine for technique-focused non-standard-group buyer; excellent temperature control but locks you into WPM ecosystem for parts and service.
Known weak points — Thermoblock scale buildup if distilled water not used; group head seal replacement factory-only (non-user serviceable)
“The KD-310GBS is a premium espresso machine and despite the group head not being an E61 the temperature accuracy and stability are outstanding, in fact, amongst the best I've tested.”
The measurements
Scored 0–5 on the same rubric as everything on file — the words matter more than the numbers.
The measurements
0–5, one rubric- Shot ceiling
- capable3
- Steam power
- workable3
- Built to last
- fair3
- Easy daily
- demanding2
Position in the market
Every dot is a rival, measured the same way. The gold one is this.
- Lower half for shot ceiling
- a higher ceiling than 81 of the 238 machines we’ve measured
- Lower half for build
- sturdier than 28% of the field, by the community’s own record
Every dot is a machine measured on the same rubric. See the whole market
Living with it
The part spec sheets skip: counter space, upkeep, and what owners learn later.
The honest note — Owners who outgrow the KD-310 typically want a commercial-spec E61 group or a dual-boiler for faster back-to-back recovery and broader portafilter accessory compatibility — machines like the ECM Synchronika or Bezzera Duo come up in that conversation. The GBS/VPS variants within the KD-310 family offer real-time variable pressure as a nearer step.
The full spec sheet
- Type
- Thermoblock / thermojet
- Heat-up time
- 45 seconds
- Steam power
- 3/5
- Brew + steam at once
- Yes
- Guest recovery
- 3/5
- Shot quality ceiling
- 3/5
- PID temperature control
- Yes
- Milk system
- Manual steam wand
- One-touch drinks
- 2
- Removable brew group
- No
- Hot-water tap
- Yes
- Workflow demand
- 3/5
- Maintenance
- 3/5
- Noise
- 3/5
- Build longevity
- 3/5
- Dimensions
- 28 × 43 × 46 cm
Before it arrives
What completes this machine — the faded pieces can wait.
Descaler & backflush kit — Electric boilers scale up and grouts gunk up — a descaler plus backflush routine is what keeps the machine alive for a decade.
- Descaler & backflush kit — Electric boilers scale up and grouts gunk up — a descaler plus backflush routine is what keeps the machine alive for a decade.
- Coffee scale with timer — Espresso is a ratio. A 0.1g scale with a built-in timer is the single biggest consistency upgrade for any manual machine.
- Espresso cups & glassware — Proper demitasse and latte glasses keep the drink hot and look the part.
Feed it right
Week one is dial-in — and stale beans will lose it.
Coffee more than a few weeks past roast won’t extract predictably, and a new machine gets blamed for it. While you learn it, a forgiving medium-light roast keeps dial-in kind — bright enough to taste progress, sweet enough to drink the misses.
Pick your coffee — any of these dials in beautifully here:
Wild Ember - Ethiopian Buno Dambi UddoSCA 92Medium roast · Odo Shakiso, Guji Zone, Oromia · NaturalBlueberry · MarmaladeSteady and repeatable — right for this setup’s lane.CA$26.83 · roasted to order
Etherea - Ethiopian YirgacheffeSCA 88Medium roast · NaturalJasmine · BergamotSteady and repeatable — right for this setup’s lane.CA$24.16 · roasted to order
Sergio - Brazillian Fazenda Joia Rara Aerobic FermentedSCA 88Medium-light · Cerrado Mineiro · Aerobic FermentedHoney · OrangeSteady and repeatable — right for this setup’s lane.CA$29.18 · roasted to orderNo proper grinder yet? Sort that first — it decides more of the cup than the machine does. We ship whole bean, roast-dated, timed so it lands fresh the week your burrs do.
Roasted to order, daily, in Ajax, Ontario · ships Canada-wide. We’re the roastery behind this database — measuring the machines is how we make sure the coffee gets a fair shot.
On film
How it runs on camera, from around the community.
Common questions
Can the KD-310 brew and steam at the same time?
Yes. The separate supersteam thermoblock and independent 4-bar steam pump allow simultaneous espresso extraction and milk frothing without switching modes or waiting.
What portafilter size does the KD-310 use?
It uses a 58 mm stainless steel group head. However, it is not an E61 group, so standard E61 aftermarket portafilters will not fit directly — check WPM-compatible aftermarket options.
Does the KD-310 have pre-infusion?
Yes. The base KD-310 features 4 pre-soak programs; the GB and GBS variants extend this to 1-10 s programmable pre-infusion.
How quickly does the KD-310 heat up?
The thermoblock architecture heats very quickly — typically ready to brew within 30-60 seconds, though allowing a couple of minutes for full thermal stabilisation is recommended.
Is the KD-310 available outside Asia?
Yes. The KD-310 series is now distributed in Australia, the UK, the USA, and Europe through authorised WPM distributors.
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