Londinium · Espresso machineCompressa
A plumb-in-only, pumpless spring-lever heat exchanger built from the R24 chassis — no reservoir, no electronics, no noise — for the home worker who wants genuinely commercial shot quality on tap all day.
The short version
The Compressa strips the R24 to its mechanical core: copper HX boiler, 58 mm sprung lever, and mains water pressure as the sole pre-infusion source.
You must commit to plumbing it in and accept that pre-infusion pressure is whatever your line delivers, ideally shaped with an external regulator.
Why people buy it
- No pump means silent operation during pre-infusion; line pressure gives smoother, uninterrupted flow than a pulsing vibratory pump
- HX design maintains idle shot-ready temperature indefinitely — no flush, no warm-up ritual, no cooling shot required
Why they don’t
- Mandatory plumbing to both mains supply and drain is a hard infrastructure requirement — no tank fallback whatsoever
The full tally
- No pump means silent operation during pre-infusion; line pressure gives smoother, uninterrupted flow than a pulsing vibratory pump
- HX design maintains idle shot-ready temperature indefinitely — no flush, no warm-up ritual, no cooling shot required
- Copper boiler and stainless steel body are fully self-serviceable; Londinium ships any part worldwide in a week via DHL Express
- Simultaneous steaming while the lever extracts is genuine, not a workaround, because the brew chamber isolates from the boiler on lever release
- Mandatory plumbing to both mains supply and drain is a hard infrastructure requirement — no tank fallback whatsoever
- Pre-infusion pressure is dictated by line pressure or an external PRV; anyone wanting precise, electronically adjustable PI (1–6 bar at the press of a button) must step up to the R24
- 15–30 minute heat-up time and 34 kg weight make this decidedly non-portable; the machine is meant to live in one spot and stay on all day
What the community knows
Years of owner threads, distilled — a niche favourite.
A lever-first machine that rewards manual control and operator skill over convenience — the Compressa draws strong loyalty from lever enthusiasts specifically for its mechanical simplicity, line-pressure preinfusion without solenoid complexity, responsive maker support, and…
Parts & serviceability
parts and repairs — you are never stranded
Built to last
years before you outgrow or replace it
Reliability
shows up every morning, year after year
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 — Most owners see this as a long-term manual-control platform, not a stepping stone — the lever investment is THE point, not a trade-up path to pump machines.
“I like the convenience of a plumbed in machine, so the Compressa is perfect for me. I also like the ability to control PI pressure depending on bean that I'm using.”
“There is an additional advantage to the compressa versus the r24, with line pressure pre-infusion you will have a smooth gentle application of pressure/flow for pre-infusion versus a pump kicking on and off.”
The measurements
Scored 0–5 on the same rubric as everything on file — the words matter more than the numbers.
Position in the market
Every dot is a rival, measured the same way. The gold one is this.
Living with it
The part spec sheets skip: counter space, upkeep, and what owners learn later.
The honest note — Owners who want digitally adjustable pre-infusion pressure (1–6 bar) and WiFi scheduling without re-plumbing step up to the Londinium R24. Those wanting multiple group heads for entertaining move to the Londinium I or II.
The full spec sheet
- Brew + steam at once
- No
- PID temperature control
- No
- Removable brew group
- No
Before it arrives
What completes this machine — the faded pieces can wait.
Gooseneck kettle · not optional — Manual and lever machines bring no water of their own — a temperature-stable gooseneck is how you actually pull a shot.
- Gooseneck kettle — Manual and lever machines bring no water of their own — a temperature-stable gooseneck is how you actually pull a shot.
- Water filter / softener — Plumbed-in machines need inline filtration to keep scale out of the boiler — it is cheaper than a repair.
- 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.
- Standalone milk steamer — No steam wand on board — a standalone steamer (Bellman, Subminimal NanoFoamer) is how you get a real flat white.
- Knock box — Somewhere to bang the spent puck that is not your kitchen bin.
- Calibrated tamper — The bundled tamper is usually an afterthought; a fitted, calibrated one makes prep repeatable.
- WDT distribution tool — Breaks up clumps before tamping — a cheap fix for channeling on any portafilter machine.
- Handheld milk frother — The cheapest path to foam for a no-steam machine — fine for casual milk drinks, not latte art.
- 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
Does the Compressa have any internal pump?
No. The Compressa has no internal pump. It uses mains water pressure — typically 2–5 bar depending on your supply — for pre-infusion. The extraction pressure itself is generated by the large spring in the lever group, exactly as on other Londinium spring-lever machines.
Can I use the Compressa without plumbing it in?
Not as sold. The Compressa must be permanently connected to a pressurised mains water supply and a drain. Some owners have used a tank-and-pump accumulator setup (e.g. Shurflo pump with a pressure accumulator) as an alternative to direct mains plumbing, but this requires additional external hardware.
How do I control pre-infusion pressure?
By fitting an external pressure-reducing valve (PRV) and inline gauge between your water supply and the machine's inlet. Londinium recommends 2–3 bar for medium to dark roasts; up to 5–6 bar is used by some for very light or Nordic-style roasts. Without a PRV, your line pressure is the PI pressure.
Do I need to pull warm-up or cooling shots?
No. The HX design maintains the correct idle brew temperature without flushing. Consecutive shots maintain thermal stability indefinitely. This is one of the Compressa's core workflow advantages.
Can I steam milk while pulling a shot?
Yes. Because the brew chamber isolates from the boiler the moment the lever is raised, steam is available throughout extraction and immediately after. Londinium notes that this is why a dual boiler confers no advantage on a lever machine.
What grinder class does the Compressa need?
At minimum a capable midrange espresso grinder with stepless adjustment. Given the machine's shot quality ceiling, a single-dose or premium grinder is a better long-term match.
Worth comparing
Profitec
RIDE
The RIDE is a compact dual-boiler E61 machine from Heidelberg, Germany, that heats both stainless steel boilers simultaneously for a claimed 10–12 minute cappuccino-ready time — a meaningful step forward from its predecessor, the Pro 600.
US$2,599–2,899 · CA$3,165–3,700
Rocket Espresso
Giotto FAST (2025)
Rocket's 2025 redesign of its iconic Giotto, now with an actively heated E61 group that cuts warm-up to around 12 minutes — without abandoning the insulated 1.8L copper HX boiler and rotary or vibratory pump options that made the line.
US$2,400–3,100 · CA$4,595–4,995
LUCCA
M58 Sunto Espresso Machine with Flow Control
A compact E61 dual-boiler built exclusively for Clive Coffee by Quick Mill in Milan, with a cartridge-heated group head, OLED PID, pre-installed flow-control paddle, and a rotary pump — all in a footprint smaller than most E61 dual-boilers.
US$3,295–3,440
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